You collect a random sample of 50 children and compute X¯X¯ , the average height in inches. The sample standard deviation (s) equals 10. Suppose the true mean height μ equals 45 inches. For which of the following values of X¯X¯ will a 99% confidence interval contain the true mean μ? I. X¯X¯ = 47.5 inches II. X¯X¯ = 50 inches III. X¯X¯ = 42 inches

You collect a random sample of 50 children and compute X¯X¯ , the average height in inches. The sample standard deviation (s) equals 10. Suppose the true mean height μ equals 45 inches. For which of the following values of X¯X¯ will a 99% confidence interval contain the true mean μ? I. X¯X¯ = 47.5 inches II. X¯X¯ = 50 inches III. X¯X¯ = 42 inches

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A particular fruit's weights are normally distributed, with a mean of 678 grams and a standard deviation of 14 grams.If you pick 14 fruits at random, then 20% of the time, their mean weight will be greater than how many grams?Give your answer to the nearest gram.
A particular fruit's weights are normally distributed, with a mean of 781 grams and a standard deviation of 38 grams. If you pick 25 fruits at random, then 9% of the time, their mean weight will be greater than how many grams? Give your answer to the nearest gram.
A large population of 5,000 students take a practice test to prepare for a standardized test. The population mean is 146 questions correct, and the standard deviation is 70. What size samples of students should a researcher take to get a distribution of means of the samples with a standard deviation of 10?
Suppose X, the grade on a midterm exam, is normally distributed with mean 80 and standard deviation 10. The instructor wants to give 15% of the class an A. What cutoff should the instructor use to determine who gets an A?
A statistics practitioner took a random sample of 54 observations from a population whose standard deviation is 32 and computed the sample mean to be 109. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 90% confidence. Confidence Interval = C. Estimate the population mean with 99% confidence. Confidence Interval =
For a sample with a standard deviation of s=4, a score of X=35 corresponds to Z= -1.25. what is the sample mean?
A population has a mean μ=88 and a standard deviation σ=28. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=49. μx= (Simplify your answer.)
A sample of n = 15 scores has a mean of M = 6. One person with a score of X = 22 is added to the sample. What is the value for the new sample mean?
The time to travel to school for high school students in South Bend is known to have a normal distribution with a standard deviation of o = 15 minutes. You take a simple random sample of 40 South Bend high school students students, and their average time to travel to school is 25 minutes. Find the 90% confidence interval for the population mean time. O A. (21.91, 28.09) B. (21.96, 28.04) O C. (21.00, 29.00) D. (21.10, 28.90)
A particular fruit's weights are normally distributed, with a mean of 585 grams and a standard deviation of 18 grams.If you pick 15 fruits at random, then 17% of the time, their mean weight will be greater than how many grams?Give your answer to the nearest gram.
A particular fruit's weights are normally distributed, with a mean of 613 grams and a standard deviation of 19 grams.If you pick 20 fruits at random, then 11% of the time, their mean weight will be greater than how many grams?Give your answer to the nearest gram.
If a standard deviation is 1.4 away from a mean of 7.2 what is the z score of an x value of 10