A Web Usage Snapshot indicated a monthly average of 34 Internet visits of a particular website peruser from home. A random sample of 30 Internet users yielded a sample mean of 35.9 visits with astandard deviation of 4.3.At the 0.05 level of significance, can it be concluded that this differs from the national average?Assume the population is normally distributed.Express your answers correct to 3 decimal places.a) What test should be performed (z or t)? Type the corresponding letter.b) Find the critical value(s). If there are two values (2 –tail test), type the negative value first andseparate them with a comma.c) Calculate the test statisticd) Make a decision. Type R if you choose to "Reject the null hypothesis"; Type F if you choose to"Fail to reject the null hypothesis".e) Choose the correct conclusion (Type 1 or 2):1. At 5% level of significance, there is not enough evidence to support the claim that the mean isdifferent from the national average.2. At 5% level of significance, there is enough evidence to support the claim that the mean isdifferent from the national average.

Answered: Image /qna-images/answer/65d7c051-6dc9-428f-b8e1-de5f339c24b9.jpg

A Web Usage Snapshot indicated a monthly average of 34 Internet visits of a particular website per user from home. A random sample of 30 Internet users yielded a sample mean of 35.9 visits with a standard deviation of 4.3. At the 0.05 level of significance, can it be concluded that this differs from the national average? Assume the population is normally distributed.

A Web Usage Snapshot indicated a monthly average of 34 Internet visits of a particular website per user from home. A random sample of 30 Internet users yielded a sample mean of 35.9 visits with a standard deviation of 4.3. At the 0.05 level of significance, can it be concluded that this differs from the national average? Assume the population is normally distributed.

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

Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean of 260 mg and a standard deviation of 48 mg. In a random sample of 600 adults, how many consume at least 320 mg of caffeine daily?
The shelf life of a battery produced by one major company is known to be Normally distributed, with a mean life of 3.5 years and a standard deviation of 0.75 years. What is the upper quartile of battery shelf life? Use the fact that the middle 50% of the data falls within 0.67 standard deviations from the mean.
The combined math and verbal scores for students taking a national standardized examination for college admission, is normally distributed with a mean of 800 and a standard deviation of 140. If a college requires a minimum score of 900 for admission, what percentage of student do not satisfy that requirement?
The lengths of nails produced in a factory are normally distributed with a mean of 3.343.34 centimeters and a standard deviation of 0.070.07 centimeters. Find the two lengths that separate the top 3%3% and the bottom 3%3%.
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?
A company produces widgets with a mean weight of 10 ounces and a standard deviation of 0.5 ounces. If the weight of widgets is normally distributed, what percentage of widgets weigh between 9.5 and 11 ounces?
In a certain country the heights of adult men are normally distributed with a mean of 67.2 inches and a standard deviation of 2.3 inches. The country's military requires that men have heights between 64 inches and 75 inches. Determine what percentage of this country's men are eligible for the military based on height.
The duration of flights between two locations is normally distributed with a mean of 6 hours and a standard deviation of 45 minutes. Approximately what percentage of these flights can be expected to take between 7 and 8 hours?
Humerus bones from the same species of animal have approximately the same length-to-width ratios. It is known that Species A has a mean ratio of 5.9. Suppose that 100 fossil humerus bones were unearthed at a site where Species A is known to have flourished. (We assume that all bones are from the same species.) The length-to-width ratios of these bones have a sample mean 5.6 and sample standard deviation 0.25. Can we conclude that the mean ratio of these bones is significantly smaller than those of Species A? Test with a 0.01 significance level. What is the standard error?
If IQ scores are normally distributed with a mean of 100 and a standard deviation of 15, what is P85?