2357on 2 3 4 15 16 17 18 19 20 211011121314222324252627282930313233344. Suppose that statisticians claim that the population mean is900. Assume that a sample of 200 was taken and provided asample mean equal to 935. Conduct a hypothesis test using a =.01 to check if the actual population mean is different from thehypothetical 900. The population standard deviation o = 180.Follow the 5 step procedure; use the critical value approach.IntroReadu 6023+▬▬=

Claim: The population mean is 900.The null and alternative hypotheses are:As the direction of…

Answered: 4. Suppose that statisticians claim…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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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 statistics students such that it can be said with 90% confidence that the sample mean is within 4 IQ points of the true mean. Assume that o = 16 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation. ... The required sample size is (Round up to the nearest integer.) Would it be reasonable to sample this number of students? No. This number of IQ test scores is a fairly large number. Yes. This number of IQ test scores is a fairly small number. No. This number of IQ test scores is a fairly small number. Yes. This number of IQ test scores is a fairly large number.
Suppose that you are interested in estimating the average number of miles per gallon of gasoline your car can get. You calculate the miles per gallon for each of the next sixteen times you fill the tank. Suppose that in truth, the values for your car are bell-shaped, with a mean of 24 miles per gallon and a standard deviation of 1. Find the possible sample means you are likely to get based on your sample of sixteen observations. Consider the intervals into which 68%, 95%, and almost all of the potential sample means will fall, using the Empirical Rule. (Round all answers to the nearest thousandth.)About 68% of possible sample means will be in the range between_____and_____ .About 95% of possible sample means will be in the range between____and_____.About 99.7% of possible sample means will be in the range between_____and_____.
we want to obtain a sample to estimate a population mean. Based on previous evidence, researchers believe the population standard deviation is approximately 38.7. We would like to be 99% confident that the estimate is within 4 of the true population mean. How large of a sample size is required ?
An IQ test is designed so that the mean is 100 and the standard deviation is 21 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 95% confidence that the sample mean is within 5 IQ points of the true mean. Assume that σ=21 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation.
An IQ test is designed so that the mean is 100 and the standard deviation is 13 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 95% confidence that the sample mean is within 6 IQ points of the true mean. Assume that o = 13 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation. ..... The required sample size is. (Round up to the nearest integer.)
Dylan has collected 20 quarters and wants to compare the age of each coin to the age of all coins in the US. Select all the reasons why a z-test should not be used. Choose all that apply: 1. The sample standard deviation cannot be calculated 2. The sample size is >10 3. We do not have the population standard deviation 4. The sample size is <30 5. The population is <500
Suppose that you are interested in estimating the average number of miles per gallon of gasoline your car can get. You calculate the miles per gallon for each of the next sixteen times you fill the tank. Suppose that in truth, the values for your car are bell-shaped, with a mean of 24 miles per gallon and a standard deviation of 1. Find the possible sample means you are likely to get based on your sample of sixteen observations. Consider the intervals into which 68%, 95%, and almost all of the potential sample means will fall, using the Empirical Rule. (Round all answers to the nearest thousandth.)About 68% of possible sample means will be in the range between_____ and_____.About 95% of possible sample means will be in the range between______ and______ .About 99.7% of possible sample means will be in the range between ____and_____ . You may need to use the appropriate table in the Appendix of Tables to answer this question.
A population has a mean µ = 87 and a standard deviation o=27. Find the mean and standard deviation of a sampling distribution of sample means with sample size n = 81. (Simplify your answer.)
You want to know if a treated sample mean, M, is significantly different from some hypothesized mean, however, you do not have access to the popuation standard deviation, so you estimate it by computing the standard deviation of the sample. Which stats test do you run? a. z test for determining position of a score, x, in a population. b. one-sample t test. c. independent-samples t test. d. z test for determining the position of a mean, M, in a sampling distribution.
Suppose that you are interested in estimating the average number of miles per gallon of gasoline your car can get. You calculate the miles per gallon for each of the next twenty-one times you fill the tank. Suppose that in truth, the values for your car are bell-shaped, with a mean of 27 miles per gallon and a standard deviation of 1. Find the possible sample means you are likely to get based on your sample of twenty-one observations. What are the intervals into which 68%, 95%, and 99.7% of the potential sample means will fall, using the Empirical Rule? (Round your answers to three decimal places.) About 68% of possible sample means will be in the range between___ and___ . About 95% of possible sample means will be in the range between___ and___ . About 99.7% of possible sample means will be in the range between ___and ____.
You would like to make an interval estimate of a population mean from a sample of size 25. Assume the population standard deviation is 6. Assuming 98% Confidence, what is the margin for error for the estimate.
4. You want to estimate the mean weight loss of people one year after using the Atkins diet. How many dieters must be surveyed if we want to be 95% confident that the sample mean weight loss is within 0.20 lb of the true population mean? Assume that the population standard deviation is known to be 10.8 lb.

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