B and C A random sample of 300 male students at PCC shows that 230 of them have internet access athome while a random sample of 350 female students shows that 290 of them have internetaccess at home. Test the claim that the percentage of males who have internet access is largerthan that of females at a 0.05 level of significance.• State the hypothesis:• Find the critical value(s). (Round the nearest hundredths)• Compute the test statistic. (Round the nearest hundredths)• Make a decision.• Summarize your conclusion in a COMPLETE SENTENCE.

Given data : x1= 230.0 n1= 300 x2= 290.0 n2= 350 significance level,…

Answered: A random sample of 300 male students at…

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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In a survey of 470 drivers from the South, 404 wear a seat belt. In a survey of 360 drivers from the Northeast, 292 wear a seat belt. At α=0.07, can you support the claim that the proportion of drivers who wear seat belts is greater in the South than in the Northeast? Assume the random samples are independent Find the critical value(s) and identify the rejection region(s).
It is desired to test the claim that a steady diet of wolfbane will cause a lycanthrope (werewolf) to lose 10 lbs. over 5 months. A random sample of 56 lycanthropes was taken yielding an average weight loss over 5 months of 12.5 pounds, with S = 7 lbs. Identify the critical value suitable for conducting a two-tail test of the hypothesis at the 5% level.
A humane society claims that less than 39% of U.S. households own a dog. In a random sample of 402 U.S. households, 155say they own a dog. At α=0.01, is there enough evidence to support the society's claim? (a) Write the claim mathematically and identify H0 and Ha. (b) Find the critical value(s) and identify the rejection region(s). (c) Find the standardized test statistic. (d) Decide whether to reject or fail to reject the null hypothesis, and (e) interpret the decision in the context of the original claim.
In a Wilcoxon Signed-Ranks test, what is the difference between the critical value and the p-value?
If conducting a two-sided test at level of significance 0.05 based on a sample of size 20, the critical t-value is ?
A computer company stated that children uses their products 6.77 hours per week. You gathered 30 independent samples from a group of children using their products and obtained an average 7.8 hours per week, with a sample standard deviation of 2.9 hours and at alpha = 0.10, compute the critical value
The local swim team is considering offering a new semi-private class aimed at entry-level swimmers, but needs at minimum number of swimmers to sign up in order to be cost effective. Last year’s data showed that during 8 swim sessions the average number of entry-level swimmers attending was 15. Suppose the instructor wants to conduct a hypothesis test. The alternative hypothesis for this hypothesis test is: "the population mean is less than 15". The sample size is 8, σ is known, and alpha =.05, the critical value of z is?
Hauz of Gaz claims that more than two-thirds of the houses in a certain subdivision use their brand. Is there a reason to doubt this claim if 25 out of a random sample of 40 houses in the subdivision use the company's brand? Test the claim at 0.01 level of significance. What is the value of the test statistic? (a) 0.6053 (b) 0.6503 (c) -0.6053 (d) -0.6503 Based on the result on the comparison between critical and computed value, what can be concluded? (a) There is enough evidence to reject the claim that more than two-thirds of the houses in the subdivision use Hauz of Gaz brand (b) There is not enough evidence to reject the claim that more than two-thirds of the houses in the subdivision use Hauz of Gaz brand (c) Accept the null hypothesis (d) The given information is not enough to make any conclusion
A random sample of 54 students from Cabrillo College are selected from a normal population with mu equal to 20 and sigma equal to 5. After a treatment is administered to the students, the researcher calculated the sample mean to be 21. Is there enough evidence to conclude that the treatment had an effect at the 5% significance level? If the z-statistic equals 1.46 and the critical values are -1.96 and 1.96, what conclusion can we make? (a)reject the null hypothesis and accept the alternative hypothesis (b)cannot determine (c)fail to reject the null hypothesis (d)fail to reject the alternative hypothesis
A sample of size n = 20 is drawn from a normal population. Find the critical value tα/2 needed to construct a 99% confidence interval.
The health of employees is monitored by periodically weighing them in. A sample of 54 employees has a mean weight of 183.9 pounds. Assuming that σis known to be 121.2 pounds, use a 0.10 significance level to test the claim that the population mean of all such employees weights is not equal to 200 pounds. State the alternative hypothesis, H1. Compute is the critical value(s)? Compute is the test statistic? State your conclusion.
Follow the steps in Test of Hypothesis including your conclusion and round off the critical value and test statistic into 4 decimal places Two suppliers manufacture a plastic gear used in a laser printer. The impact strength of these gears measures in foot-pounds is an important characteristic. A random sample of 10 gears from supplier 1 results in x1 = 290 and s1 = 12 while another random sample of 16 gears from the second supplier results in x2 = 321 and s2 = 22. Is there evidence to support the claim that supplier 2 provides gears with higher mean impact strength. Use a =0.04, and assume that both populations are normally distributed with equal variances.

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