The average salary for American college graduates is $44, 300. You suspect that the average is different for graduates from your college. The 61 randomly selected graduates from your college had an average salary of $44,099 and a standard deviation of $4,460. What can be concluded at the a0.10 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Họ: ? Select an answer Ha: ? Select an answer c. The test statistic (please show your answer to 3 decimal places.)

A national publication reported that a college student living away from home spends, on average, no more than $15 per month on laundry. You believe this figure is too low and want to disprove this claim. To conduct the test, you randomly select 17 college students and ask them to keep track of the amount of money they spend during a given month for laundry. The sample produces an average expenditure on laundry of $19.34, with a population standard deviation of $4.52. Use these sample data to conduct the hypothesis test. Assume you are willing to take a 10% risk of making a Type I error and that spending on laundry per month is normally distributed in the population

Of interest is whether the percent of managers at High Tech Inc. that pay over $8 per day for lunch is the same as the percent of technicians. Sixty managers are surveyed and forty-six of them pay over $8 per day for lunch. One hundred forty-nine techniciansare surveyed and ninety-eight of them pay over $8 per day for lunch. The hypothesis test to use is????   independent group means, population standard deviations known   independent group means, population standard deviations unknown   matched or paired samples   two proportions

Which of the following is the correct p-value for this test?

Write your answers for this question on paper and then upload: From sampling 40 taxicab rides in New York City, a survey found that the mean cost of the taxi fare from the sample was $12.04. If the population standard deviation is $8.36, test the claim that the mean cost of a taxicab ride in New York City is less than $15.00. (a) State the null and alternative hypothesis. (b) By hand, find the test statistic z-score. Round to two decimal places. (c) Sketch the sampling distribution labeling the test statistic found in part (b) and compare it to the critical value z-score found in the previous question to make a decision to either reject or fail to reject the null hypothesis. Upload Choose a File

According to the College Board, scores on the math section of the SAT Reasoning college entrance test for the class of 2010 had a mean of 516 and a standard deviation of 116. Assume that they are roughly normal.One of the quartiles of the scores from the math section of the SAT Reasoning test is 438. The other quartile is _______.

Do political science classes require less writing than history classes? The 43 randomly selected political science classes assigned an average of 14.6 pages of essay writing for the course. The standard deviation for these 43 classes was 5.9 pages. The 52 randomly selected history classes assigned an average of 15.4 pages of essay writing for the course. The standard deviation for these 52 classes was 4.5 pages. What can be concluded at the a= 0.01 level of significance? For this study, we should use t-test for the difference between two independent population means a. The null and alternative hypotheses would be: Ho: 1 H₁: 1 C O μ2 C Add Work μ2 b. The test statistic t c. The p-value = 0.2279 d. The p-value is ? a e. Based on this, we should Select an answer the null hypothesis. f. Thus, the final conclusion is that ... 0.749 (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) O The results are statistically insignificant at a = 0.01, so there…

Can you help me determine the P-value for the following hypothesis test?

Tina catches a 14-pound bass.  She does not know the population mean or standard deviation.  So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds.  Find the t and calculate a 95% (α = .05) confidence interval.

An auditor, pressed for time and on a low budget, is concerned with account errors on customer credit. She takes a sample of 25 accounts, and finds the account error, on average, is $-23, with a standard deviation of $16. Is the claim of the manager that errors average only $-10 supported? In this case, the null hypothesis is what?