Define Arithmetic Mean.

Define Arithmetic Mean.
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Ans: It is the most commonly used average or measure of the central tendency applicable only in case of quantitative data. Arithmetic mean is also simply called “mean”. Arithmetic mean is defined as: “Arithmetic mean is quotient of sum of the given values and number of the given values”.
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Related questions

Give merits and demerits of arithmetic mean.

Description : Give merits and demerits of arithmetic mean.

Last Answer : Merits:  It is rigidly defined.  It is easy to calculate and simple to follow.  It is based on all the observations.  It is determined for almost every kind of data.  It is finite ... accurately if any item is missing.  The mean sometimes does not coincide with any of the observed value.

Define Dependent Event.

Description : Define Dependent Event.

Last Answer : Ans: If there are two events i.e. A in sample space 1 (S1) and B in sample space 2 (S2) and occurrence or non-occurrence of one event affects the occurrence and nonoccurrence of other event then it is called dependent event.

Define Independent Event.

Description : Define Independent Event.

Last Answer : Ans: If there are two events i.e. A in sample space 1 (S1) and B in sample space 2 (S2) and occurrence or non-occurrence of one event does not affect the occurrence and non-occurrence of other event then it is called independent event.

Define Equally Likely Event.

Description : Define Equally Likely Event.

Last Answer : Ans: If two events A & B have equal chance of occurrence in sample space S then the event will be Equally Likely Event.

Define Not-Mutually Exclusive events.

Description : Define Not-Mutually Exclusive events.

Last Answer : Ans: If two events A & B have some thing common in sample space S then the event will be Not-Mutually exclusive event.

Define Mutually Exclusive events.

Description : Define Mutually Exclusive events.

Last Answer : Ans: If two events A & B have nothing common in sample space S then the event will be mutually exclusive event.

Define Impossible event.

Description : Define Impossible event.

Last Answer : Ans: An event of sample space contains none of the possible outcome is called impossible event and is denoted by Greek letter φ.

Define possible event.

Description : Define possible event.

Last Answer : Ans: An event of sample space contains at least one possible outcome is called possible event.

Define compound event.

Description : Define compound event.

Last Answer : Ans: An event of sample space contains at least two outcomes is called compound event these may be denoted by any letter A to Z.

Define simple event.

Description : Define simple event.

Last Answer : Ans: An event of sample space contains only one outcome is called simple event.

Define an event. What are its types?

Description : Define an event. What are its types?

Last Answer : Ans: A single result of an experiment or any desired sub set of the sample space is called and event and it may be denoted by any letter A to Z. it has two main types (1) Possible event & (2 ... (1) simple event (2) compound event and compound event has one more type which is sure or certain event.

Define Sample Point.

Description : Define Sample Point.

Last Answer : Ans: The elements of the sample space or possible outcome of a given random experiment is called sample point.

Define Sample Space or possible outcomes.

Description : Define Sample Space or possible outcomes.

Last Answer : Ans: All possible outcomes of an experiment are called sample space and is denoted by “S” i.e. in toss of coin the sample space will be two (Head & Tail) & in throwing a die it will be 6 (1, 2, 3, 4, 5, 6)

Define Probability.

Description : Define Probability.

Last Answer : Ans: Probability is the measurement of uncertainty which consists on occurrence or non-occurrence of an event.

Define an experiment/random experiment/trial?

Description : Define an experiment/random experiment/trial?

Last Answer : Ans: In probability, experiment or trial is simply an action in which the result is uncertain or simply uncertain situation in statistics is called Random Experiment (R.E).

Define price relative.

Description : Define price relative.

Last Answer : Ans: Price in current year divided by price of base year and multiplied by 100 is simply called price relative.

Define link relative.

Description : Define link relative.

Last Answer : Ans: Price of current period divided by price of immediate previous period multiplied by 100 is called link relative.

Define Unweighted index number

Description : Define Unweighted index number

Last Answer : Ans: Unweighted index number is an index in which weights are not assigned to an index.

Define weighted index number

Description : Define weighted index number

Last Answer : Ans: Weighted index number is an index in which weights are assigned to that index.

Define Chain Base method.

Description : Define Chain Base method.

Last Answer : Ans: In this method index number is computed in two steps. As a first step, we calculate link relative by dividing current period price/quantity/value by price/quantity/value of immediate ... relative by link relative of immediate previous period of current period and divide this product by 100.

Define Mode with examples.

Description : Define Mode with examples.

Last Answer : Ans: Most repeated value of the given data is called mode for example if X=2, 2, 3, 4, 5, 5, 5, 6, 8, 10. In this data most repeated value is 5 so our mode will be 5.

Define cumulative frequency distribution.

Description : Define cumulative frequency distribution.

Last Answer : Ans: A table showing the cumulative frequency distribution is called the cumulative frequency distribution or a cumulative frequency distribution is a summary of a set of data showing the frequency (or number) of items less than or equal to the upper class limit of each class.

Define Histogram.

Description : Define Histogram.

Last Answer : Ans: Histogram is a set of adjacent rectangles in which area of each rectangle is proportional to the corresponding class frequency and class size.

Define class mark.

Description : Define class mark.

Last Answer : Ans: The class marks or mid point is the mean of lower and upper class limits or boundaries. So it divides the class into two equal parts. It is obtained by dividing the sum of lower and upper class limit or class ... . For Example: The class mark or mid point of the class 60 - 69 is 60 69/2 = 64.5

Define class interval.

Description : Define class interval.

Last Answer : Ans: The difference between the upper and lower class boundaries (not between class limits) of a class or the difference between two successive mid points is called size of class interval.

Define class limits.

Description : Define class limits.

Last Answer : Ans: The variant values of the classes or groups are called the class limits. The smaller value of the class is called lower class limit and larger value of the class is called upper class limit. ... 19, the smaller value 10 is lower class limit and larger value 19 is called upper class limit.

Define tabulation.

Description : Define tabulation.

Last Answer : Ans: The process of placing classified data into tabular form is known as tabulation. A table is a symmetric arrangement of statistical data in rows and columns. Rows are horizontal arrangements ... vertical arrangements. It may be simple, double or complex depending upon the type of classification.

Define attribute by giving example.

Description : Define attribute by giving example.

Last Answer : Ans: Attribute represents the quality or character. For example color of eyes, type of mangoes, beauty etc.

Define continuous data and give two examples.

Description : Define continuous data and give two examples.

Last Answer : Ans: Data which can be described by a continuous variable is called continuous data. For e.g. age of persons, speed of car, temperature at a place, income of a person, height of a plant, a life time of a T.V tube etc

Define population and sample.

Description : Define population and sample.

Last Answer : Ans: Total group under discussion is called population. For example height of all class students. A part of population which represents the population is called sample.

Define discrete variable by giving examples.

Description : Define discrete variable by giving examples.

Last Answer : Ans: A variable which can assume only some specific values within a given range is called discrete variable. For e.g. Number of students in a class, Number of houses in a street, number of children in a family etc. it can’t occur in decimal.

Define discrete and continuous variable.

Description : Define discrete and continuous variable.

Last Answer : Ans: A variable which can assume only some specific values within a given range is called discrete variable. For e.g. Number of students in a class, Number of houses in a street, number of children in a family etc. ... at a place, income of a person, height of a plant, a life time of a T.V tube etc.

Define Statistics in your own words.

Description : Define Statistics in your own words.

Last Answer : Ans: Statistics is the science which deals with data. After collection & organization of data, it is further analyzed statistically and interpreted. It is the science of average, counting & probability.

Standard deviation and mean?

Description : Standard deviation and mean?

Last Answer : It is very handy to just memorize the 68 – 95 – 99.7 rule. It means 68% of the population is within +/-1 SD, 95% are within 2 SD and 99.7 are within 3 SD.

Can an IQR, mean or median be negative?

Description : Can an IQR, mean or median be negative?

Last Answer : If your data set consists of negative numbers, I don’t see why not. Average of – 2, – 2, and -3 is -2.333. See? Negative average. Same goes for the median and IQR too.

When people (or Facebook) ask "what is your hometown?" does that mean the town you were born in, the town you grew up in, or the town you live in at present?

Description : When people (or Facebook) ask "what is your hometown?" does that mean the town you were born in, the town you grew up in, or the town you live in at present?

Last Answer : Where you grew up.

How you differentiate ordinary mean from weighted mean?

Description : How you differentiate ordinary mean from weighted mean?

Last Answer : Ans: In situation where al items do not have equal importance, we use weighted mean rather than arithmetic mean and where all items do have equal importance, we use arithmetic mean.

The distribution of heights of American women aged 18 to 24 is approximately normally distributed with a mean of 65.5 inches and standard deviation of 2.5 inches. Calculate the z-score for a woman six feet tall. a. 2.60 b. 4.11 c. 1.04 d. 1.33

Description : The distribution of heights of American women aged 18 to 24 is approximately normally distributed with a mean of 65.5 inches and standard deviation of 2.5 inches. Calculate the z-score for a woman six feet tall. a. 2.60 b. 4.11 c. 1.04 d. 1.33

Last Answer : a. 2.60

The histogram above represents the lifespan of a random sample of a particular type of insect. Determine the relationship between the mean and median. a. mean = median b. mean ≈ median c. mean < median d. mean > median

Description : The histogram above represents the lifespan of a random sample of a particular type of insect. Determine the relationship between the mean and median. a. mean = median b. mean ≈ median c. mean < median d. mean > median

Last Answer : d. mean > median

Using the data in question 7, calculate number of observations that are two or more sample standard deviations from the sample mean. a. 0 b. 1 c. 2 d. 3

Description : Using the data in question 7, calculate number of observations that are two or more sample standard deviations from the sample mean. a. 0 b. 1 c. 2 d. 3

Last Answer : a. 0

Using the data in question 7, calculate the 95% confidence interval for the mean ACT score based on the t-distribution. a. -∞ to 23.05 b. -∞ to 23.15 c. 18.07 to 23.63 d. 18.22 to 23.48

Description : Using the data in question 7, calculate the 95% confidence interval for the mean ACT score based on the t-distribution. a. -∞ to 23.05 b. -∞ to 23.15 c. 18.07 to 23.63 d. 18.22 to 23.48

Last Answer : c. 18.07 to 23.63

Provided that the ACT is reasonably normally distributed with a mean of 18 and standard deviation of 6, determine the proportion of students with a 33 or higher. a. 0.0062 b. 0.0109 c. 0.0124 d. 0.0217

Description : Provided that the ACT is reasonably normally distributed with a mean of 18 and standard deviation of 6, determine the proportion of students with a 33 or higher. a. 0.0062 b. 0.0109 c. 0.0124 d. 0.0217

Last Answer : a. 0.0062

A national random sample of 20 ACT scores from 2010 is listed below. Calculate the sample mean and standard deviation. 29, 26, 13, 23, 23, 25, 17, 22, 17, 19, 12, 26, 30, 30, 18, 14, 12, 26, 17, 18 a. 20.50, 5.79 b. 20.50, 5.94 c. 20.85, 5.79 d. 20.85, 5.94

Description : A national random sample of 20 ACT scores from 2010 is listed below. Calculate the sample mean and standard deviation. 29, 26, 13, 23, 23, 25, 17, 22, 17, 19, 12, 26, 30, 30, 18, 14, 12, 26, 17, 18 a. 20.50, 5.79 b. 20.50, 5.94 c. 20.85, 5.79 d. 20.85, 5.94

Last Answer : Katie earned 84,92,84,75 and 70 on her first 5 tests. What is the minimum grade Katie needs to earn on the next test to have a mean of 84?

Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of 15, the proportion of people with IQs above 130 is: a. 95% b. 68% c. 5% d. 2.5%

Description : Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of 15, the proportion of people with IQs above 130 is: a. 95% b. 68% c. 5% d. 2.5%

Last Answer : d. 2.5%

Does your state list all covid cases in your state?

Description : Does your state list all covid cases in your state?

Last Answer : My county reports to the state of Georgia, and the numbers are based on the number of positive tests in the county. This assembled from both medical offices (hospitals, doctors offices, etc.) ... the state). There is no subcategory in the statistics for state residents versus non-state residents.

When it comes to the COVID pandemic, what statistics are important to you?

Description : When it comes to the COVID pandemic, what statistics are important to you?

Last Answer : 1. Daily positive cases in my state and the positivity rate 2. I am also interested in knowing where the likely sources of positivity came from: tourists versus community transmission. 3. Percentage of beds ... Dept. of Health, and we provide some of these data points daily. I trust the department.

Stats homework question?

Description : Stats homework question?

Last Answer : Read your course notes or follow this tutorial. https://www.mathsisfun.com/data/binomial-distribution.html

In a game where a random success rate is offered (as opposed to a game that is 100% winable) what should you expect as a success rate?

Description : In a game where a random success rate is offered (as opposed to a game that is 100% winable) what should you expect as a success rate?

Last Answer : LOL! Interesting question. But you missed a spot on the floors. Well, you have to factor in that it’s not just random success. There is some strategy involved too.

What topics are covered in university math statistics ?

Description : What topics are covered in university math statistics ?

Last Answer : Today is your lucky day amigo. One of the finest universities in all of the US is offering you, RedDeerGuy1, a special chance to take a real, college level, Statistics class, free of charge, ... statistically speaking, people who start the course are at least 50% more likely to finish it. Get some.

Not understanding p value (chi square statistic problem)

Description : Not understanding p value (chi square statistic problem)

Last Answer : The p value is a test of your data as it applies to your claim about that population of data or your null hypothesis (what you are testing for). It tells you whether or not your claim is valid. A p value ... or less couldn't tell with the term cut off ) than 3.841 (the claim), the p value being