How to calculate sample size covering a percent of a population?

How to calculate sample size covering a percent of a population?
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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

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?

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.

A statistic is: a. a sample characteristic b. a population characteristic c. unknown d. normally distributed

Description : A statistic is: a. a sample characteristic b. a population characteristic c. unknown d. normally distributed

Last Answer : a. a sample characteristic

A parameter is: a. a sample characteristic b. a population characteristic c. unknown d. normal normally distributed

Description : A parameter is: a. a sample characteristic b. a population characteristic c. unknown d. normal normally distributed 

Last Answer : b. a population characteristic

If two samples are different in size, like 20 to 60, is it a good idea to apply two sample t-tests and chi-square tests?

Description : If two samples are different in size, like 20 to 60, is it a good idea to apply two sample t-tests and chi-square tests?

Last Answer : answer:If the data is continuous (or close to it), then I would use this version of the two-sample t-test. You would not have to downsize the sample. The number of degrees of freedom is hard to ... you can use the smaller sample size, minus one, as a conservative estimate. In this case, df > 19.

Can you give me a sample question of a College Statistics Class?

Description : Can you give me a sample question of a College Statistics Class?

Last Answer : Select several of these choices and see the answers and discussions.

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)

What is Sample?

Description : What is Sample?

Last Answer : Ans: A part of population which represents the population is called sample.

Distinguish a complete enumeration from sample survey

Description : Distinguish a complete enumeration from sample survey

Last Answer : Ans: Complete enumeration is the study of whole population in specified time while sample survey is the statistical study of the part of population.

Why sample survey is preferred over census?

Description : Why sample survey is preferred over census?

Last Answer : Ans: Sample survey is preferred over census because it is cost and time effective over census.

Differentiate census from sample survey.

Description : Differentiate census from sample survey.

Last Answer : Ans: In the census, data is collected at a specified time from the entire population but in survey data is collected partly from the population.

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

How do I calculate the odds of this? (Statistics and probability question)

Description : How do I calculate the odds of this? (Statistics and probability question)

Last Answer : It seems to me that the odds would be 0.001X0.81=0.00081 (0,001X0,81=0,00081: in the US we use commas to denote our decimal points) or i.e., 0,081%

How does the banker calculate his offers in the tv show Deal or No Deal?

Description : How does the banker calculate his offers in the tv show Deal or No Deal?

Last Answer : Yeah I’d really like to understand this too. You’re right though, its got to be some sort of statistical function of the amount player has already acquired, the amount remaining and the number of cases that remain.

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

Using the data from 16, calculate the correlation coefficient. a. r = 0.490 b. r = 0.985 c. r = 0.971 d. r = 0.240

Description : Using the data from 16, calculate the correlation coefficient. a. r = 0.490 b. r = 0.985 c. r = 0.971 d. r = 0.240

Last Answer : b. r = 0.985

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

Does the lesbian and gay community seriously account for 10% of the population?

Description : Does the lesbian and gay community seriously account for 10% of the population?

Last Answer : The Gallup organization estimates in this 2002 article that 10% of the adult male population is gay. The number is less for adult women.

What is population?

Description : What is population?

Last Answer : Ans: The total group under discussion is called population. For example height of all class students.

Observational studies allow: a. population inference b. causal inference c. both types of inference d. neither type of inference

Description : Observational studies allow: a. population inference b. causal inference c. both types of inference d. neither type of inference

Last Answer : d. neither type of inference

Randomly assigning treatment to experimental units allows: a. population inference b. causal inference c. both types of inference d. neither type of inference

Description : Randomly assigning treatment to experimental units allows: a. population inference b. causal inference c. both types of inference d. neither type of inference

Last Answer : b. causal inference

Why you would probably obtain inaccurate results if you used the titration data you collected in this experiment to calculate the actual percent of C3H5O(COOH)3 in a juice sample?

Description : Why you would probably obtain inaccurate results if you used the titration data you collected in this experiment to calculate the actual percent of C3H5O(COOH)3 in a juice sample?

Last Answer : Need answer

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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?

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Description : Stats homework question?

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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.

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Can a Powerball ticket be called an investment when the payoff is above $600 Million?

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Description : Standard deviation and mean?

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Description : What are a list of countries that don't have a debt or deficit?

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What's the difference between a percentage of a sum and a percentage less than a sum?

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Description : How do I do this statistical calculation?

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