Data show that men between the ages of 20 and 29 in a general population have a mean height of 69.3 inches, with a standard deviation of 3.1 inches. A baseball analyst wonders whether the standard deviation of heights of major-league baseball players is less than 3.1 inches. The heights (in inches) of 20 randomly selected players are shown in the table.Test the notion at the α = 0.10 level of significance.What are the correct hypotheses for this test?- The null hypothesis is $ H_0: \sigma = 3.1 $.- The alternative hypothesis is $ H_1: \sigma < 3.1 $.Calculate the value of the test statistic.\[ \chi^2 = 8.632 \] (Round to three decimal places as needed.)Use technology to determine the P-value for the test statistic.The P-value is __________ (Round to three decimal places as needed.)

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Answered: Data show that men between the ages of…

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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The distribution of heights in a population of women is approximately normal. Sixteen percent of the women have heights less than 62 inches. About 97.5% of the women have heights less than 71 inches. Use the empirical rule to estimate the mean and standard deviation of the heights in this population. Mean: K inches Standard Deviation: inches
Newborn babies: A study conducted by the Center for Population Economics at the University of Chicago studied the birth weights of 716 babies born in New York. The mean weight was 3506 grams with a standard deviation of 868 grams. Assume that birth weight data are approximately bell-shaped. Estimate the number of newborns who weighed between 1770 grams and 5242 grams. Round to the nearest whole number. The number of newborns who weighed between 1770 grams and 5242 grams is
The ages in years of a random sample of shoppers at a gaming store are shown. Determine the range, mean, variance, and standard deviation of the sample data set 12,17,23,14,17,16,20,17,13,15
Homework 7 - Ch x Question 12 of 30 × BPS9e Tables Question 13 of 30 X Question 2 of 26 X D2L Re-post -- 3.2 De X x | m/sac/10839544# /10839544/11/1 on 12 of 30 > Resources Suppose that, in fact, the total cholesterol level of all men aged 20-34 follows the Normal distribution with mean μ = 182 milligrams per deciliter (mg/dL) and standard deviation σ = 37 mg/dL. Use Table A if necessary. Side-by-Side © Macmillan Learning < DII 80 F3 F4 F5 F6 F7 F8 $ SA 4 % do5 66 * m New Chro Solution Penalized Al Tutor Try Again Attempt 2 Choose an SRS of 1000 men from this population. Now what is the probability that x falls within ±2 mg/dL of μ? Round your answer to four decimal places. 0.0431 probability: Incorrect Answer ( བ F9 F10 F11 7 8 9 0 D √)) + || F12
The table below summarizes the number of hours a sample of college students spent watching television in the past week. Hours Frequency 10 - 12 4 13 - 15 12 16 - 18 20 19 - 21 14 Find the standard deviation.
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 68 miles per hour, with a standard deviation of 3 miles per hour. Estimate the percent of vehicles whose speeds are between 65 miles per hour and 71 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately nothing% of vehicles travel between 65 miles per hour and 71 miles per hour.
In a recent year, Washington State public school students taking a mathematics assessment test had a mean score of 276.1 and a standard deviation of 34.4. A random sample of 64 students is drawn from this population. Identify the mean and standard deviation of the sample mean scores. 2. Find the probability that the sample mean score is at least 285.
z Scores LeBron James, one of the most successful basketball players of all time, has a height of 6 feet 8 inches, or 203 cm. Based on statistics from Data Set 1 “Body Data” in Appendix B, his height converts to the z score of 4.07. How many standard deviations is his height above the mean?
eText Contents A credit score measures a person's creditworthiness. Assume the average credit score for Americans is 687. Assume the scores are normally distributed with a standard deviation of 46. Study Plan al Determine the interval of credit scores that are one standard deviation around the mean. Video & Resout b) Determine the interval of credit scores that are two standard deviations around the mean. c) Determine the interval of credit scores that are three standard deviations around the mean. Library a) The interval of credit scores that are one standard deviation around the mean ranges from to Accessible Resi (Type integers or decimals. Use ascending order.) Purchase Optic Communicatio Enter your answer In the edit flelds and then click Check Answer (? parts remaining CicckAnswer O Type here to search F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 PriSc Numlk DIO Sar Lk SysRq % 7 7 3 4 8. € 6 9. E R Tab 4. sLock D K
The number of chocolate chips in a popular brand of cookie is normally distributed with a mean of 22 chocolate chips per cookie and a standard deviation of 3.6 chips. When the cookies come out of the oven, only the middle 90% in terms of the number of chocolate chips are acceptable (the rest are considered defective). What are the cutoff numbers for the number of chocolate chips in acceptable cookies? (Give your answers to one decimal place.) Preview and Preview
The Internal Revenue Service reports that the mean federal income tax paid in the year 2010 was $8040. Assume that the standard deviation is $4900. The IRS plans to draw a sample of 1000 tax returns to study the effect of a new tax law. Do you think it would be unusual for an individual to pay a tax of less than $7800? Explain. Assume the variable is normally distributed. Round the answer to at least four decimal places.

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