Question

In: Statistics and Probability

The following questions require that you conduct appropriate tests of the null hypotheses outlined in each...

The following questions require that you conduct appropriate tests of the null hypotheses outlined in each question using an a=0.05 significance level. In all cases you are expected to use the appropriate inferential statistical test available in the Excel data analysis tool pack. Questions requiring a post hoc means comparison test (ie Scheffe’s or Tukey’s HSD test) are worth 20 marks, otherwise they are worth 10 marks.

A researcher is attempting to determine whether significant differences exist between the mean time spent studying (hours per week) among students in four different undergraduate degree programs at Trent University. Identify and test the appropriate hypothesis for this study. If necessary, complete a means comparison test using the Tukey’s HSD test outlined in the text book (page 103 and Appendix 4).

Professional Programs Natural Sciences Humanities Social Sciences
19 18 16 15
27 16 11 16
24 22 13 22
36 16 15 9
39 12 8 16
13 15 23 16
11 34 26 34
25 10 22 21
21 19 18 26
17 18 24 12
31 17 15 22
25 13 8 25
12 20 16 13
24 31 24 19
29 24 17 24
18 23 7 16
22 29 18 12
24 30 11 16
34 22 9 19
39 19 14 12
16 26 28 12
22 10 16 13
26 26 21 19

Solutions

Expert Solution

orchestra answered 1 year ago
Next > < Previous

Related Solutions

The following questions require that you conduct appropriate tests of the null hypotheses outlined in each...
The following questions require that you conduct appropriate tests of the null hypotheses outlined in each question using an a=0.05 significance level. In all cases you are expected to use the appropriate inferential statistical test available in the Excel data analysis tool pack. Questions requiring a post hoc means comparison test (ie Scheffe’s or Tukey’s HSD test) are worth 20 marks, otherwise they are worth 10 marks. A toxicologist has conducted a study to determine whether a new insecticide will...
The following questions require that you conduct appropriate tests of the null hypotheses outlined in each...
The following questions require that you conduct appropriate tests of the null hypotheses outlined in each question using an a=0.05 significance level. In all cases you are expected to use the appropriate inferential statistical test available in the Excel data analysis tool pack. Questions requiring a post hoc means comparison test (ie Scheffe’s or Tukey’s HSD test) are worth 20 marks, otherwise they are worth 10 marks. A researcher is attempting to determine whether significant differences exist between the mean...
The following questions require that you conduct appropriate tests of the null hypotheses outlined in each...
The following questions require that you conduct appropriate tests of the null hypotheses outlined in each question using an =0.05 significance level. In all cases you are expected to use the appropriate inferential statistical test available in the Excel data analysis tool pack. Questions requiring a post hoc means comparison test (ie Scheffe’s or Tukey’s HSD test) are worth 20 marks, otherwise they are worth 10 marks. A biologist is interested in the nutritional quality of different species of plants...
For each of the following tests of hypotheses, determine whether the null hypotheses should be rejected....
For each of the following tests of hypotheses, determine whether the null hypotheses should be rejected. Use the classical method by finding the lower xL and upper xU limits for two-tail tests (or one of the two for a one-tail test). Additionally, don't forget to use a t-value (rather than a z-value) when n<30. A) Ho: µ = 6,000 Ha: µ ≠ 6,000; n = 70; x = 6,150; σ = 2,600; α = .01 B) Ho: µ = 50...
Following to questions answer the following: - Provide the null and alternative hypotheses with the appropriate...
Following to questions answer the following: - Provide the null and alternative hypotheses with the appropriate symbols. - The significance level of the test. If it is not given use a significance level of 0.05. - The P-value for the test. State whether you reject or fail to reject the null hypothesis. In other words, compare the P-value to the significance level to decide whether to reject or fail to reject the null hypothesis. Question 1: The body mass index...
For each of the following: a) state the null and alternative hypotheses                               &n
For each of the following: a) state the null and alternative hypotheses                                                     b) state the type I & type II errors                                                     c) state the consequences of each error                                                     d) is one more serious? Explain. 1) You have created a new manufacturing method for producing widgets which you claim will reduce the time necessary for assembling the parts. Currently it takes 75 seconds to produce a widget. The retooling of the plant for this change is very expensive...
For each of the dependent means t-tests below: 1) State the null and alternative hypotheses 2)...
For each of the dependent means t-tests below: 1) State the null and alternative hypotheses 2) Set the criteria for a decision (i.e. state alpha, one- or two-tailed test, degrees of freedom and the cutoff score(s) 3) Compute: The mean of the difference scores, the sum of squares, the estimated population variance of difference scores, the variance of the distribution of means of difference scores and the standard deviation of the distribution of means of difference scores (show all work)...
1: Conduct the following hypothesis test. Specify the null and alternative hypotheses, and clearly state the...
1: Conduct the following hypothesis test. Specify the null and alternative hypotheses, and clearly state the conclusion of the test. Use the data from 6.3.3 (?̅ = 31.7, ? = 8.7, ? = 5). Is there enough evidence to conclude that the mean thymus weight is greater than 25mg? Set ? = 0.05 2: Suppose we used a two-tailed alternative for the previous test instead (thymus weight is not equal to 25mg). How would the p-value of the test change?...
State the null and alternative hypotheses for each of the following situations (each ½ point): a)...
State the null and alternative hypotheses for each of the following situations (each ½ point): a) A guideline for a telemarketing company states the mean time for completed calls should not exceed four minutes. Each month the company’s owner selects a random sample of call logs to determine whether the call-time goal is being met. b) General Crunch Corporation distributes Mini-Oats Cereal in boxes with a stated weight of 18 ounces. To determine whether the filling machine should be adjusted,...
Write the null and alternative hypotheses for each of the following examples. Determine if each is...
Write the null and alternative hypotheses for each of the following examples. Determine if each is a case of a two-tailed, a left-tailed, or a right-tailed test. Also determine the sampling distribution for the hypothesis test. a.To test if the mean number of hours spent working per week by college students who hold jobs is different from 20 hours. b.To test whether or not a bank’s ATM is out of service for an average of more than 10 hours per...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT