An IQ test is designed so that the mean is 100 and the standard deviation is 16 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of the residents of a state if you want to be 95% confident that the sample mean is within 3 IQ points of the true mean. The required sample size is. (Round up to the nearest whole number.)

Q: One sample of scores has a mean of M = 45 and a sample size of n = 10 scores.  A second sample of…

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Q: For the data in the following sample: 1,1,9,1 A. Find the ss, variane, and standard deviation. B.…

A: Given data: 1,1,9,1

Q: Illustration : The mean and standard deviation of a set c 100 observations were 40 and 5 respective…

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A: It is given that the mean and standard deviation are 50 and 10, respectively.

Q: The mean and standard deviation of a data set are 5 and 7, respectively. If each observation in the…

A: From the provided information, Mean (x̄) = 5 Standard deviation (s) = 7

Q: IQ scores have a mean of 100 and a standard deviation of 15. What percentile corresponds to an IQ…

A: Given that Mean =100  Standard deviation =15  We have to the percentile  corresponding to an IQ…

Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…

A: It is given that mean amount of food is 12 oz and number of dogs is 16. The sum of squared…

Q: 5.) If you choose 50 companies, what is the probability that the percent gain of the company is…

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Q: If your calculator finds both kinds of standard deviation, the sample standard deviation and the…

A: Solution-: If your calculator finds both kinds of standard deviation, the sample standard deviation…

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: The scores at a golf course recorded last year followed a normal distribution with mean 78 and…

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Q: Problem: The scores of 6 job applicants  Given: 6, 12, 9, 10, 6 and 8. Calculate the mean, the…

A: We have given that,  The data set is,  6, 12, 9, 10, 6, 8 We will find the mean, mean deviation and…

Q: After 5 points are added to each score in a sample, the mean is found to be M=45 . What was the…

A: Given data: c = 5 points are added to each score in a sample. New mean, M = 45 Let the original mean…

Q: There are two major tests of readiness for college, the ACT and the SAT. ACT scores are reported on…

A: From the provided information, For ACT score: Mean (µ) = 21.5 Standard deviation (σ) = 5.4 For SAT…

Q: Suppose a variable is normally distributed. What percentage of scores fall between one standard…

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Q: Kelsey Matthau is an advisor for a high school. The high school offers a class for students…

A: The Given hypothesis test for the difference between two means of independent samples is…

Q: the following situation, find the mean and standard deviation of the population. List all samples…

A: See the Excel output

Q: Scores on a test have a mean of 6 and a standard deviation of 9. Michelle has a score of 57. Convert…

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Q: The average and standard deviation for ACT scores are 20 and 3 respectively. average and standard…

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Q: (Simplify your answer.) (Simplify your answer.)

A: It is given that  Mean, μ = 73 Standard deviation, σ = 6 Sample size, n = 36

Q: Use the normal distribution of IQ scores, which has a mean of 75 and a standard deviation of 18 ,…

A: X~N(μ=75,σ=18)

Q: For a statistics test the mean is 63 and the standard deviation is 7.0, and for a biology test the…

A: We know that ,Z-score=x-μσ

Q: Overweight Men For a random sample of 60 overweight men, the mean of the number of pounds that they…

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Q: In an  administration to 2000 student the average score is 65 and the standard deviation is 25.…

A: Given in an administration to 2000 student the average score is 65 and the standard deviation is 25.…

Q: Use the table to find the standard score and percentile of the following data values. a. A data…

A: We will use the given table to solve the problem.

Q: Scores range from 0 to 200. The mean for Canadian college students is about 115, and the standard…

A: The given data is as follows:Population mean, Population standard deviation, Sample size, Sample…

Q: At the Fredericton High School it is estimated that at most 25% of the students ride bikes to…

A: Let, p = proportion of students who ride bikes to school

Q: The mean score on the ACT test was 21.5 and the standard deviation was 5.0. The mean score on the…

A: ACT score μ1 = 21.5σ1 = 5.0x1 = 26SAT score μ2 = 515σ2 = 100x2 = 605 which score will relatively…

Q: Section 2. Assume again that you are a wildlife biologist studying morphological cha turtles. Now…

A: Sample size n=36Sample mean=99Sample standard deviation=16

Q: On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90,…

A: Given that, Mean = 72 Standard deviation = 7

Q: Tony decided that he wants to pursue a master degree in business. One of the requirement is the GMAT…

A: Given that  Tony's GMAT = X = 730 Mean = 556 , Standard deviation = 116

Q: d. The degrees of freedom = e. The test-statistic for this data (Please show your answer to three…

A: d. Degrees of freedom: df=number of categories-1   =4-1   =3

Q: The average number of accidents at controlled intersections per year is 4.3. Is this average less…

A:

Q: ind the percentage of area under a normal curve between the mean and the given number of standard…

A: The mean and standard deviation of the standard normal distribution are 0 and 1.