For a recent vear, the following are the numbers of homicides that occumred each month in a city, Use a 0.05 significance lervel to test the claim that homicides in the city are uniformly distributed. Based on the resuts, does it appear that homicides in the city occur more often in certain months, that is, that the distribution of homicides in the city is not uniformly distributed? Dec Determine the nul and altemative hypotheses. Calculate the test statistic, x-O (Round to tree decimal places as needed) Caloulate the Pvalue. Pvalue -DRound to thvee decimal places as needed.) What is the conclusion for this hypothesis test? OA Reject Hg. There is insufficient evidence to warrant rejection of the claim that homicides in a city are uniformly distributed. OB. Fail to reject H There is insufficient evidence to warrant rejection of the claim that homicides in a city are uniformly distributed. O C. Fail to reject H. There is sufficient evidence to warrant rejection of the claim that homicides in a city are uniformily distributed. OD. Reject H, There is sufficient evidence to warrant rejection of the claim that homicides in a city are uniformly distributed. Based on the results, does it appear that homicides in the city occur more often in certain months, that is, that the distribution of homicides in the oity is not uniformly distributed? OA Based on the results, it appears that homicides occur more often in certain months. OB. Based on the results. it does not appear that homicides occur more often in certain months.

A travel company is investigating whether the average cost of a hotel stay in a certain city has increased over the past year. The company recorded the cost of a one-night stay for a Friday night in January of the current year and in the previous year for 31 hotels selected at random. The difference in cost (current year minus previous year) was calculated for each hotel. Which of the following is the appropriate test for the company’s investigation?     A one-sample zz-test for a population mean A A one-sample tt-test for a sample mean B A one-sample zz-test for a population proportion C A matched-pairs tt-test for a mean difference D A two-sample tt-test for a difference between means E

Suppose we want to know the mean number of shurikens thrown each night by ninjas in Konoha village. Getting this information from every ninja in the village would take forever. Instead, we randomly select 20 ninjas from the ninja school that is closest to us. a. Describe the statistic of interest in this survey b. The method used to obtain the sample of ninjas above is an example of which of the following  (i) convenience sampling (ii) voluntary response sampling (iii) stratified random sample (iv) multi-stage sampling

A national nursing organization is lobbying congress for sunding to hire more nurses nationwide. One of the arguments is that nurses, on average, work significantly longer than full time duty, assuming full time is 40 hours a week. A sample of n=9 nurses had the following work hours last week:  43, 45,48,41,45,50,50,53,48   Calculate the mean length of work hours for the sample.

QUESTION 5 What is iny 0.8944)? (Use the normal tables and report to two digits.) QUESTION 6 What is 0inyl 0.9878)? (Use the normal tables and report to two digits.)

Make reference to the table below to answer the question that follows: Summary of number of times the child has been placed previously Mean Std. Dev. Freq. physically attacked people never sometimes often Total Source Between groups Within groups 5.5803571 5.9557503 8.7636364 8.7938607 9.8571429 7.8631146 Total 6.9893617 7.2826725 L₂² Analysis of Variance SS df MS 112 55 21 188 F 568.203236 2 284.101618 9349.77549 185 50.539327 9917.97872 187 53.0373194 Bartlett's test for equal variances: chi2(2) = 12.1506 Prob-chi2= 0.002 5.62 Prob > F Does this test violate the assumption of equal variances? 0.0043 O Yes, we are in violation of the assumption of equal variances because p= .002 for Bartlett's test O Yes, we are in violation of the assumption of equal variances because p= .0043 for the difference of means test O No, we are not in violation of the assumption of equal variances because .0043 for the difference of means test No, we are not in violation of the assumption of equal…

It is claimed that the mean household size in the River Terrace neighbourhood is 3.5 persons. A random sample of 25 households is taken. What statistical method will you use to determine if this statement is correct? Student's t-test z-test Chi-Square Test Fisher's Exact Test Leader's 25 lb test

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The shelf life of a photographic film is of interest to the manufacturer, whoobserves the following shelf life for eight units chosen at random from the currentproduction. Assume that shelf life is normally distributed – 108, 134, 124, 116, 128, 163, 159, 134 days. Is there any evidence that the mean shelf life is greater than to 125 days.