EspWatching TV: The 2012 general Social Survey asked a large number of people how much time they spent watching TV each day, The mean number of hourswas 3.09 with a standard deviation of 2.82. Assume that in a sample of 38 teenagers, the sample standard deviation of daily TV time is 2.9 hours, and that thepopulation of TV watching times is normally distributed. Can you conclude that the population standard deviation of TV watching times for teenagers is less than2.827 Use the a -0.05 level of significance.Part 1 of 5State the appropriate null and alternate hypothesesHo-2822.82This hypothesis test is a let tailedv tostPart:1/5Part 2 ol5Fnd the critical value Round the answer to three decenal placesFor a-0.05, the critical value is

Answered: Watching TV The 2012 general Social…

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 mean for life expectancy is 47.6 for White people who were born in 1900 and 33.0 for non-white people. Suppose you randomly sample the death records for people born in 1900 in a certain country. Of the 124 white people, the mean life span is 45.3 years and the standard deviation is 12.7 years. 82 of the non-white people have a mean life span of 34.1 and a standard deviation of 15.6 years. A hypothesis test is needed to see if the mean is the same for both countries for White and Non-White people. Is this a right, left or two-tailed test.
stid Asuccessful basketball player has a height of 6 feet 3 inches, or 191 cm. Based on statistics from a data set, his height converts to the z score of 2.31. How many standard deviations is his height above the mean? The player's height is (Round to two decimal places as needed.) standard deviation(s) above the mean.
The standard deviation of quiz scores in Math 22 of EE courses is 8.6. A professor believes this value to be less. He samples 20 quiz scores and finds that the standard deviation is 6.9. Does this sample provide enough evidence to suggest that the true standard deviation is less than 8.6?
Time to Complete Final Exam. The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. Answer the following questions. Assume that 20% of students did not complete the exam. What was the exam duration?
Test the claim that the standard deviation of the ages of Phychologist in California us 7.3 at 0.01 level of significance. a random sample of 15 psychologist had a standard deviation of 6.9. Find the test value
Watching TV: The 2012 general Social Survey asked a large number of people how much time they spent watching TV each day. The mean number of hours was 3.09 with a standard deviation of 2.7 . Assume that in a sample of 32 teenagers, the sample standard deviation of daily TV time is 4.3 hours, and that the population of TV watching times is normally distributed. Can you conclude that the population standard deviation of TV watching times for teenagers differs from 2.7 ? Use the =α0.10 level of significance.
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
After the pandemic hit and people were forced to spend more time indoors, there have been a suspicion among health professionals. that people are eating more and thus gaining weight. In 2018, the average weight of 192 pounds, and health experts want to know if that average weight of the American male has gone up during this pandemic. d. A sample of 50 American males yeilded a sample average weight of 195 pounds and a sample standard deviation of 14.5 pounds. What is your conclusion at the 5% level of significance? (be sure to state your conclusion in the context of this problem) e. Would your conclusion change if the level of significance were changed to 1%? Briefly explain.
Entrance exam scores at Cititon University are normally distributed with a mean of 552 and a standard deviation of 29. If scholarships are awarded to the top 10% of scores, what is the minimum score needed to guarantee a scholarship?
Watching TV: The 2012 general Social Survey asked a large number of people how much time they spent watching TV each day. The mean number of hours was 3.09 with a standard deviation of 2.9. Assume that in a sample of 37 teenagers, the sample standard deviation of daily TV time is 2.2 hours, and that the population of TV watching times is normally distributed. Can you conclude that the population standard deviation of TV watching times for teenagers differs from 2.9? Use the a=0.10 level of significance.
Watching TV: The 2012 general Social Survey asked a large number of people how much time they spent watching TV each day. The mean number of hours was 3.09 with a standard deviation of 2.73. Assume that in a sample of 32 teenagers, the sample standard deviation of daily TV time is 3.2 hours, and that the population of TV watching times is normally distributed. Can you conclude that the population standard deviation of TV watching times for teenagers is greater than 2.73 ? Use the a= 0.01 level of significance. Part 1 of 5 State the appropriate null and alternate hypotheses. Ho:0 2.73 H1:0 > . 2.73 This hypothesis test is a right-tailed test. Part: 1/5 Part 2 of 5 Find the critical value. Round the answer to three decimal places. For a-0.01, the critical value is 岛国

At a college, the mean height of women is 64 inches with the standard deviation of 5 inches. What is the z-score for a height of 59? What is the z-score for a height of 74? What is the height of a woman with a z-score of 3? Submit Question

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