Referring to Table 1, the null hypothesis will be rejected at 1% level of significance. Question 28 options: 1) Do not know 2) No 3) Yes Table 1A problem with a phone line that prevents a customer from receiving or making calls is upsettingto both the customer and the telecommunications company. The file "Phone" contains samples of20 problems reported to two different offices of a telecommunications company and the time toclear these problems (in minutes) from the customers' lines:Central Office I Time to Clear Problems (minutes)1.48 1.75 0.78 2.85 0.52 1.60 4.15 3.97 1.48 3.101.02 0.53 0.93 1.60 0.80 1.05 6.32 3.93 5.45 0.97Central Office II Time to Clear Problems (minutes)7.55 3.75 0.10 1.10 0.60 0.52 3.30 2.10 0.58 4.023.75 0.65 1.92 0.60 1.53 4.23 0.08 1.48 1.65 0.72Assuming that the population variances from both offices are equal, is there evidence that themean waiting time at Central Office I is different with that at Central Office II?You may download file "Phone".

Assuming that the population variances from both offices are equal.

Answered: Table 1 A problem with a phone line…

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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2. Use the following scenario to conduct a hypothesis test. Then use that to answer questions a- g. You would like to determine if the use of a new teaching intervention helps to improve attention in 5- year-old boys. To test this hypothesis, you have separated 35 5-year-old boys into two groups, one with the intervention (treatment group) and the other given normal class time (the control group). You would like to test if the treatment group had longer attention times (in minutes) than the control group. (The significance level of the test is .05) The following are the data for the two groups: Control Group (Group 1) 7 11 6 6 8. 11 14 7 8. 2 Treatment Group (Group 2) 11 12 14 16 18 14 11 8 7 10 11 Answer the following questions to run the hypothesis test. You should use the notation and methods described in the course: a. What test should you run? b. What is the null hypothesis in sentences and symbols? c. What is the alternative hypothesis in sentences and symbols? d. What is the…
please answer a, b, c
Are freshmen psychology majors more likely to change their major before they graduate compared to freshmen business majors? 432 of the 627 freshmen psychology majors from a recent study changed their major before they graduated and 459 of the 726 freshmen business majors changed their major before they graduated. What can be concluded at the X = 0.01 level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Ho: Select an answer H1: Select an answer Select an answer Select an answer b. The test statistic ? = c. The p-value = d. The p-value is ? ✔ α e. Based on this, we should f. Thus, the final conclusion is that ... Select an answer Select an answer (please enter a decimal) (Please enter a decimal) (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) Select an answer the null hypothesis. O The results are statistically significant at a = 0.01, so there is sufficient evidence to…
A concerned group of citizens wanted to know if the proportion of armed robberies in Texas was different in 2011 than in 2010. Their research showed that of the 113,231 violent crimes in Texas in 2010, 7,622 of them were armed robberies. In 2011, 7,439 of the 104,873 violent crimes were in the armed robbery category. Test at a 5% significance level.a) The null and alternative hypothesis would be: �0:�2010=�2011�1:�2010≠�2011 �0:�2010=�2011�1:�2010<�2011 �0:�2010=�2011�1:�2010≠�2011 �0:�2010=�2011�1:�2010>�2011 �0:�2010=�2011�1:�2010>�2011 �0:�2010=�2011�1:�2010<�2011 b) Determine the test statistic. Round to two decimals.�=c) Find the p-value and round to 4 decimals.p = d) Make a decision. Fail to reject the null hypothesis Reject the null hypothesis e) Write the conclusion. There is not sufficient evidence to support the claim that the proportion of armed robberies is different in 2011 than 2010. There is sufficient evidence to support the claim that the…
20. Which of the following is a null hypothesis? a. Pregnant women who drink cranberry juice will have lower urine bacterial counts than those who do not drink cranberry juice. b. The urine bacterial count of pregnant women who drink cranberry juice will be lower or equal to that of pregnant women who do not drink the juice. c. There will be a difference between ingestion of cranberry juice and among pregnant women who do and do not have high urine bacterial counts.
Suppose we are interested in the relationship between individuals’ place of residence (rural versus urban) and their political affiliation (Republican versus Democrat). A random sample of 100 individuals yields the following crosstabulation: Political Affiliation Place of Residence Republican Democrat Rural 21 29 Urban 14 36 a) In words, what is the null hypothesis to be tested? b) Is the relationship between place of residence and political affiliation statistically significant at the .05 level? (Be sure to show the statistics that lead to your decision.) c) Compute and interpret an appropriate measure of association for the relationship between these two variables.
A study found that 13% of Americans have seen or sensed the presence of an angel. A contingent doubts that the percent is really that high. It conducts its own survey. Out of 76 Americans surveyed, only two had seen or sensed the presence of an angel. As a result of the contingent's survey, would you agree with the study? Will you reject the null hypothesis or not?
A university has decided to introduce the use of plus and minus grading as long as there is evidence that 60% of the faculty is in support of this change. Write an appropriate null hypothesis and alternate hypothesis to test if the proportion is greater than 60%.
a statistics instructor belives that fewer than 25% of NRCC students have a cable TV subcription and instead prefer streaming content. What is the correct NULL hypothesis for this scenario? a. p< .25 b. p< or equal to .25 c. p >.25 d. p > or equal to .25

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