9.44 Vegetarians' Weights The mean weight of all 20-ycar-old worhen is 128 pounds (http://www.kidsgrowth.com). A randomsample of 40 vegetarian women who are 20 years old showcd asample mean of 122 pounds with a standard deviation of 15 pounds.The women's mcasurements were independent of each other.a. Determine whether the mean weight for 20-year old vegetarian womenis significantly less than 128, using a significance level of 0.05.b. Now suppose the sample consists of 100 vegetarian women who are 20years old, and repeat the test.c. Explain what causes the difference between the p-values for parts a and b.

a. Assume that μ is the population mean weight of all 20-year-old women.

Answered: 9.44 Vegetarians' Weights The mean…

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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) Tom scored a 122 on a measure of math ability and a 39 on a measure of verbal ability. The means and standard deviations on the measure of math ability and verbal ability are M = 105, s = 15 and M = 36, s = 2.95, respectively. In which area did Tom do better?
Q6
At least 99.61% of the data in any data set lie within how many standard deviations of the mean? Explain how you arrived at your answer. Explain how the number of standard deviations could be found for any data set. Choose the correct answer below. O A. Use Chebychev's Theorem. O B. Use the Empirical Rule. O C. Use the Coefficient of Variation. Find the number of standard deviations. k = E (Round to the nearest integer as needed.)
In the 1992 presidential election, Alaska's 40 election districts averaged 2125 votes per district for President Clinton. The standard deviation was 564. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers to two decimal places. a. What is the distribution of X? X - N( b. Is 2125 a population mean or a sample mean? | Select an answer c. Find the probability that a randomly selected district had fewer than 1995 votes for President Clinton. d. Find the probability that a randomly selected district had between 2187 and 2311 votes for President Clinton. e. Find the third quartile for votes for President Clinton. Helpful videos: P(x a number) 2, P(x is between two numbers) 2, Finding a percentile 2, Using the invNormal with greater than problems 2, Finding the IQR Hint 7…
A population has a mean 75 and standard deviation 12. a. A random sample of 125 are taken. Find the mean and the standard deviation of the sample mean. b. How would the answer to part (a) change if the size of the sample were 500 instead of 125?
Are Older men Shorter than younger men? According to a national mean report the theight arus men IS 69.4 Inches. In a sample Between ages 60 and 300 men 69 The mean theight was I 68.7 Inches. Public Health Officials Want to determine whether the mean theight 14 108 For alder men is less than the mean Height All adult men of population standard deviation is Use a=0.65 level of 3.42 Signifigance, and the pratue
Researchers collected information on the body parts of a new species of frog. The thumb length for the female frog has a mean of 8.04 mm and a standard deviation of 0.54 mm. Let x denote thumb length for a female specimen. a. Find the standardized version of x. b. Determine and interpret the z-scores for thumb lengths of 8.8 mm and 7.3 mm. Round your answers to two decimal places. a. Find the standardized version of x. X- 8.04 0.54 (Do not simplify. Use integers or decimals for any numbers in the expression. Do not round.) b. Determine and interpret the z-scores for thumb lengths of 8.8 mm and 7.3 mm. Round your answers to two decimal places. Determine and interpret the z-score for a thumb length of 8.8 mm. The z-score for a thumb length of 8.8 is |. This is standard deviations the mean thumb length. (Round to two decimal places as needed.)
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How can I analyze these graphs?
Researchers collected information on the body parts of a new species of frog. The thumb length for the female frog has a mean of 8.28 mm and a standard deviation of 0.78 mm. Let x denote thumb length for a female specimen. a. Find the standardized version of x. b. Determine and interpret the z-scores for thumb lengths of 10.3 mm and 7.1 mm. Round your answers to two decimal places. a. Find the standardized version of x. z=enter your response here

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