1. A manager wants to test if there is a significant difference in the variance of...

1. A manager wants to test if there is a significant difference in the variance of the output from two similar machines. It has been determined that the output of the two machines is normally distributed. To carry out the hypothesis test about the population variances, the manager takes random samples from the output of each machine. The results are: Machine 1 Machine 2 1x=128.9 2x=159.5 s1= 6.8 s2= 7.2 n1=13 n2=15 a.)What is the observed value of the appropriate test statistic? b.) For a 0.05 level of significance, what is the upper tail critical value for the rejection region?

2. If the test statistic for testing the hypothesis that the difference between two population proportions is greater than zero using data from large samples is 1.30, then...?

3. When using the F-value to test the hypotheses about the population variances one of the major concern is that...?

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orchestra answered 2 years ago

Test if there is a significant difference in death by Hurricanes with category 1 and category...

Test if there is a significant difference in death by Hurricanes with category 1 and category 4. Answer the questions for Assessment. (Pick the closest answer) 7. What is the P-value? a. #DIV/0! b. 0.128060089 c. 0.342038086 d. None of these 8. What is the Statistical interpretation? a. The P-value is too small to have a conclusive answer. b. The P-value is too large to have a conclusive answer. c. The P-value is smaller then 5%, thus we are very...

How does the Fisher’s least significant difference test differ from Tukey’s honestly significant difference test? Provide...

How does the Fisher’s least significant difference test differ from Tukey’s honestly significant difference test? Provide examples of when you would use each, and explain the differences between these two post-hoc test.

1- Test the hypothesis that there is a significant difference between the number of hours older...

1- Test the hypothesis that there is a significant difference between the number of hours older (60 or more) versus younger people watch T.V. Alpha is 05 a) State the assumptions b) State the null and alternate hypotheses c) explain your decision to reject or not reject and formulate your conclusion (Alpha is .05) Show your work. d) what is the mean difference between the two groups? e) what are the lower and upper 95% confidence intervals? f) which group...

As the variance decreases, the power of a significant test……. As the sample size decreases, the...

As the variance decreases, the power of a significant test……. As the sample size decreases, the power of a significance test _________ Distinguish between a parameter and a statistic? What is the relationship between the Z and t distribution?

A researcher wants to determine if there is a significant difference in the mean cost of...

A researcher wants to determine if there is a significant difference in the mean cost of a meal in the world's most expensive restaurants. A survey of 100 people in the most expensive restaurant in the world in Tokyo, Japan produced an average cost per person of $277 and a standard deviation of $35. A survey of 100 people in the second most expensive restaurant located in Toronto, Canada produced an average cost per person of $213 with a standard...

Question 1: Locate the Manufacturer tab. Test to determine if there is a significant difference between...

Question 1: Locate the Manufacturer tab. Test to determine if there is a significant difference between Mean Value Added by the manufacturer and the mean Cost of Materials in manufacturing assuming a 10% level of significance. Must complete all the parts to this problem: PART 1: Use Excel to perform the Test for Equality of Variances. Copy and paste the output from Excel into a word document. PART 2: Write 1 – 2 sentences on the findings from the Test...

A researcher wants to determine if there is a significant difference between men and women in...

A researcher wants to determine if there is a significant difference between men and women in terms of guilty/non guilty pleas submitted by a sample of 50 defendants. Knowing that there are 25 women and 25 men in this sample and that 15 men entered guilty pleas [and 10 no guilty pleas] and 5 women entered guilty pleas [and 20 no guilty pleas]… [Hint: Calculated Chi-Sq. = 8.33] Formulate the null and research/alternative hypotheses. Create a contingency table with 2...

The manager of the Burrard Credit Union wishes to know if there is a significant difference...

The manager of the Burrard Credit Union wishes to know if there is a significant difference between male and female customers’ interest in a proposed new type of savings certificate. A survey of 200 randomly selected customers has yielded the following data: INTEREST SEX Strong Moderate Weak Total Male 30 25 25 80 Female 60 40 20 120 Total 90 65 45 200 (a) What percentage of customers shows a strong or moderate interest in these savings certificates? [2 marks]...

determine whether the difference in the variance values is significant at 95 % confidence level using...

determine whether the difference in the variance values is significant at 95 % confidence level using suitable test.

Test if there is a significant difference in house prices for houses with 4 or more...

Test if there is a significant difference in house prices for houses with 4 or more bedrooms, if compared to houses with 3 or less bedrooms. Answer the questions for Assessment. (Pick the closest answer) 1. What is the P-value? a. 0.074081031 b. 1.85525E-07 c. 0.002738669 d. 0.000144083 2. What is the Statistical interpretation? a. The P-value is too small to have a conclusive answer. b. The P-value is much smaller than 5% thus we are very certain that house...

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