Pulse Rates of Men - A simple random sample of 40 men results in a standard deviation of 11.3 beats per minute (based on data set attached). The normal range of pulse rates of adults is typically given as 60 to 100 beats per minute. If the range rule of thumb is applied to that normal range, the result is a standard deviation of 10 beats per minute. Use the sample results with a 0.05 significance level to test the claim that pulse rates of men have a standard deviation greater than 10 beats per minute.

H0:

H1:

Test Statistic [Show procedure.]

P-value:

Conclusion (i.e. decision) about H0 [reject/fail to reject]

Final Conclusion on the claim [Use the wording in Figure 8-7, page 403.]

The solution provides step by step method for the calculation of testing of hypothesis. Formula for the calculation and Interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.

Suppose that on a 100-point test, the goal is for the students' exam scores to have a standard deviation of less than 10 pts. A recent sample of 22 exams has a standard deviation of 12.1. Use alpha = 0.05.
H0: population variance > or = 100
H1: population variance < 100
What is the critical Chi-square value?
For the same

Cross between pure red tomato and yellow tomato produced all red F1 progeny. From the F2 progeny of 400 plants, 90 were yellow. Hypothesize that a single pair of allele is involved such that Y- = Red and yy = Yellow. Test this hypothesis using Chi square test.

A research organization has collected the following data on household size and telephone ownership for 200 U.S. households at the 0.05 level, are the two variables independent? Based on the chi-square table, what is the most accurate statement that can be made about the p-value for the test?

Hybrid Vehicle Gas Mileage. An automotive manufacturer believes that the variance of the gas mileage for its hybrid vehicles is 7.5. You work for an energy conservation agency and want to test this claim. You find that a random sample of the miles per gallon of 25 of the manufacturer's hybrid vehicles has a variance of 8.0. Let

3. A survey of 30 students at a local college found that the sample mean number of hours worked by students is 17 hours per week with a sample standard deviation of 2 hours. Use a 0.05 significance level to test the claim that the sample students come from a population with a standard deviation of 3 hours. (Assume that the sa

Is there an alternative test to the chi squared test? What if my results give an expected frequency below 5, which stats book states that these should be treated with caution? Is there a more appropriate stat test which would be more accurate in working out the significance of the results?

The chi-squaretest. Think of a real-world situation that would best be analyzed using this technique. For this Discussion do the following:
1. Clearly describe the dependent and independent variables you would study;
2. State the research question and statistical null and alternative hypotheses; and
3. Explain why this tes

All of these questions are for my stat's class. I am having a really hard time understanding what needs to be done. I really want to learn what is going on.. I have double the amount of homework than the questions below. I went ahead and took one question from each section to get help with so I can see how to get the answers and

Perform a chi-squaretest on the following data:
(a) Regulation is the best way to ensure a safe workplace.
Managers Blue-Collar Workers
Agree 58 66
Disagree

The annual salaries of 16 randomly chosen actuaries are listed below. At ? = 0.02can you conclude the standard deviation of the annual salaries is greater than $20,000? Use the P-value method to perform the hypothesistest.
"69,264"
"64,696"
"40,288"
"52,648"
"92,784"
"53,072"
"44,272"
"103,400"
"46,952"
"47,640"
"9