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
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%
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?
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
Description : Given the following data pairs (x, y), find the regression equation. (1, 1.24), (2, 5.23), (3, 7.24), (4, 7.60), (5, 9.97), (6, 14.31), (7, 13.99), (8, 14.88), (9, 18.04), (10, 20.70) a. y = 0.490 x - 0.053 b. y = 2.04 x c. y = 1.98 x + 0.436 d. y = 0.49 x
Last Answer : c. y = 1.98 x + 0.436
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.
Description : Statistics question. Finding the standard deviation for these numbers: 1, 2, 98, 100, 105.
Last Answer : Hint: There aren’t going to be any trick questions in statistics. There is enough information to calculate the standard deviation.
Description : A statistic is: a. a sample characteristic b. a population characteristic c. unknown d. normally distributed
Last Answer : a. a sample characteristic
Description : A parameter is: a. a sample characteristic b. a population characteristic c. unknown d. normal normally distributed
Last Answer : b. a population characteristic
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
Description : What's the percentage of women who think going out with a man five feet six inches tall is something they would do?
Last Answer : I am 5’1” (as are many other women I know), so I would date a 5’6” guy.
Description : If the expected time of completion of a project is 60 weeks with a standard deviation of 5 weeks, the probability of completing the project in 50 weeks and 65 weeks respectively will be (A) 2.3% and 84.1% (B) 97.7% and 84.1% (C) 97.7 % and 15.9% (D) 15.9% and 97.7%
Last Answer : (A) 2.3% and 84.1%
Description : Maria, Ivan, Leah, Julie, and Scott measured each other’s heights for health class The heights are 42 39 41, 37 and 39 inches Julie is 2 inches shorter than Leah Maria is 1 inch shorter than Scott and 2 inches taller than Leah How tall is each student?
Last Answer : it is 5th grade math
Description : Seven men, five women and eight children were given as assignment of distributing 2000 books to students in a school over a period of three days. All of them distributed books on the first day. One of the second ... distributed on the second day? a) 1000 b) 800 c) 650 d) 900 e) Cannot be determined
Last Answer : Answer: C Sol. Let the books distributed by man, a woman and a child be 5x, 4x and 2x respectively. ∴ No. of books distributed in 1st day = 7 5x+5 4x+8 2x=71x No. of books distributed in 2nd day =7 ... 2x=46x 71x + 57x + 46x = 2000, x = 2000/174 57x=2000/174 57= 655 650 (Approx)
Description : what is the tallness of the building...,,Peter is 2 feet 9 inches away from the mirror and the mirror is 11 feet away from the wall of the building. Peter knew his eye level was exactly 5 ft 6 inches off of the ground, How tall is the building in feet?
Last Answer : 726
Description : What is the standard deviation and what is the probability that a student scored higher than 322 if the mean test score is 312 and 16 percent of the scores are under 307?
Last Answer : Assuming a normal distribution:If 16% are less than 307, then 84% are greater than 307.Using single tailed normal tables we want the z value whichgives 84%-50% = 34% = 0.34 to the left of the mean; this is z ≈ ... 1 - 0.977 = 0.023 = 2.3 % are greater than 322→ probability greater than 322 is 2.3%
Description : How to calculate sample size covering a percent of a population?
Last Answer : http://www.surveysystem.com/sscalc.htm
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%
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.
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
Description : Statistics question on Poisson distribution?
Last Answer : It's been a while, but I recall the Poisson distribution as being more useful in queuing theory. I also recall that it's more useful when you are talking about discrete, rather than continuous intervals. ... have been able to give you a better answer. However, here's Mathworld's page on the subject.
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.
Description : what is simple frequency distribution?
Last Answer : Ans: Number of times a given quantity (or group of quantities) occurs in a set of data. For example, the frequency distribution of income in a population would show how many individuals (or households) have the income of a certain level (say, $5,000 a month)
Description : What is relative frequency distribution?
Last Answer : Ans: The relative frequency is the fraction or proportion of the total number of items belonging to a class. This definition is applicable to both quantitative and categorical (qualitative) data.
Description : What steps should we consider to make a frequency distribution?
Last Answer : Ans: (a) Decide the nature of data as discrete or continuous (b) Find the range (c) Decide in the light of above two steps in which case the given problem falls. Cases are as follows: (1 ... Decide approximate desired number of classes (3) Decide desired size of class (4) Decide the design of class.
Description : What is frequency distribution?
Last Answer : Ans: A frequency distribution is a tabular arrangement of data into classes according to the size or magnitude along with corresponding class frequencies (the number of values fall in each class).
Description : 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50'. What number is missing? -Riddles
Last Answer : 22
Description : Would you be worried about your 18 year old son being raped in the army?
Last Answer : No, it would be the farthest thing on my mind. When my son was in the Navy, the worst thing that happened to him was other men trying to get him to drink alcohol, but he wasn’t interested, and, years later, still isn’t.
Description : In a large random data set following normal distribution, the ratio (%) of number of data points which are in the range of (mean ± standard deviation) to the total number of data points, is (A) ~ 50% (B) ~ 67% (C) ~ 97% (D) ~ 47%
Last Answer : Answer: B
Description : Suppose that experience has shown that only one-third of all patients having a particular disease will recover if given the standard treatment. A new drug is to be tested on a group of 12 volunteers. It is believed that the new drug will increase the individual recovery rate to one-half.
Last Answer : …..
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.
Description : How much time does the average North American spend grocery shopping?
Last Answer : answer:45 to 90 minutes per session, per week, per month? Sometimes I browse for 30 minutes, sometimes I (and my list) are in and out in 10 minutes. I do see some people who stare, ... long time at the 637 different choices of peanut butter, but don't know whether that is habitual behavior.
Description : What are the stats on the percentage of American households that actually have in-home internet access?
Last Answer : 239,893,600 Internet users as of June/10, 77.3% of the population, according to ITU. http://www.internetworldstats.com/am/us.htm
Description : The refractive index of the material of a prism of `60^(@)` angle for yellow light is `sqrt(2)`. Calculate angle of minimum deviation, angle of incide
Last Answer : The refractive index of the material of a prism of `60^(@)` angle for yellow light is ... deviation, angle of incidence and angle of refraction.
Description : The refracting angle of a glass prism is `60^(@)`. The value of minium deviation for light passing through the prism is `40^(@)`. Calculate the value
Last Answer : The refracting angle of a glass prism is `60^(@)`. The value of minium deviation for light passing through the ... prism. Given `sin 50^(@) = 0.766`.
Description : What is that most common reason some women choose to have an abortion?
Last Answer : answer:I don't think that there is a most common reason. I think that it depends on the circumstances. Tragically, something can be wrong with the fetus. Sometimes, a woman is not prepared to ... in sight, too many children already). Sometimes, a pregnancy would put the mother's life in danger.
Description : The class marks of a continuous distribution are 1.04, 1.14, 1.24, 1.34, 1.44,1.54 and 1.64. -Maths 9th
Last Answer : NEED ANSWER
Last Answer : It is not correct. Because the difference between two consecutive class marks should be equal to the class size. Here, difference between two consecutive marks is 0.1 and class size of 1.55-1.73 is 0.18, which are not equal.
Description : Nesha scored 120 out of 150 in English, 120 out of 180 in mathematics and 160 out of 200 in Science. Find Nesha’s score as percentage: (i) in Mathematics (ii) in all the three subjects (on the whole). a) 66 2/3, 78 22/51 b) 71 23/5, 45 7/31 c) 54 13/33, 82 3/4 d) 60 3/4, 76 32/41
Last Answer : Answer: A (i) Percentage scored in Mathematics = 120/180 100 = 12000/180 =1200/18 = 66 2 /3 % (ii) Total maximum of all the three subjects = 150 + 160 + 200 = 510 and Total score in the ... percentage on the whole = (400/510 100) = (40000/510) = 4000/51 = 78 22/51 %
Description : If the average compressive strength is 4000 kg/cm2 and standard deviation is 500, the co-efficient of variation is (A) 10 % (B) 12.5 % (C) 15 % (D) 18.5%
Last Answer : Answer: Option B
Description : A software company needs to develop a project that is estimated as 1000 function points and is planning to use JAVA as the programming language whose approximate lines of code per function point is accepted as 50. Considering a=1. ... ? (1) 11.2 months (2) 12.2 months (3) 13.2 months (4) 10.2 months
Last Answer : Generally, any projects are measured in weeks. However, the complex project might take more time depending on the level of object re-use available.
Description : Insert the missing number: 36/62, 39/63, 43/61, 48/64, ? (A) 51/65 (B) 56/60 (C) 54/60 (D) 33/60
Last Answer : Answer: C Observer 36/62, 39/63, 43/61, 48/64, ? series Upper part is increase by 3, 4, 5, 6 i.e 36+3= 39, 39+4 = 43, 43+5 = 48, 48 + 6 = 54.
Description : Chemical score of milk proteins is (A) 70 (B) 65 (C) 60 (D) 40
Last Answer : Answer : B
Description : How many inches are 275 65 18 tires?
Last Answer : What is the answer ?
Description : I'm 14, 5 feet and 5 inches tall, and weigh 130 pounds, am I overweight?
Last Answer : Nope. If your 130 lbs is composed entirely of flab, maybe get more exercise to tone up and be healthy, but just on the face of it, 130 is not overweight for 5“5”. Welcome to Fluther.
Description : If you had to spend the rest of your life either 50 feet tall or 5 inches tall, which would you choose?
Last Answer : The five incher!.
Description : I am not gaining weight and height, what should I do now ? I am 15 years and 6 months old. Height 5 feet 6 inches. Weight 50 kg. My problem is that I eat and drink properly. I eat milk , ... 'm very tense. Please tell, whats the story of them big puppys ..... I want detailed and accurate answer.
Last Answer : Human height depends on genetic factors. It is not possible to increase or decrease the height if you want. Protein and fat foods can help you gain weight , and you need to drink plenty of water.
Description : Who was the smallest president to be in office at 5 feet and 4 inches tall?
Last Answer : James Madison
Description : How tall is 5 feet 2 inches in inches?
Last Answer : (5 x 12) + 2 = 60 + 2 = 62
Description : How many square inches of paper are needed to cover a box that is 2 feet tall by .5 feet wide by 4 feet long?
Last Answer : 1 ft = 12 in1 sq ft = 1 ft × 1 ft = 12 in × 12 in = 144 sq insurface area cuboid = 2 × (length × width + width × depth +depth × length)= 2 × (4 ft × 0.5 ft + 0.5 ft × 2 ft + 2 ft × 4 ft)= 22 sq ft= 22 × 144 sq in= 3,168 sq in