Please all solve the question
Extracted text: A test to verify that there is no difference between two populations means of dependent samples, based on a sample of 53 observations, resulted in a test statistic of 1,759 and a variance of the difference between sample means of 7.985. The difference between the two sample means is... Select one: A. 4.53 В. 1.93 С. 0.26 D. 0.68 p-values can only be determined for hypothesis tests about one mean, not differences in means. Select one: A. More information is needed. B. False. C. True. You perform a test on the difference between two population means and obtain statistic of 2.5. you know ox = 7.1, ơy = 5.44, nx = 20, ny = 20 and y = 9, then x is... Select one: A. 14.0 B. 10.97 C. 13.0 D. 10.56 There can only be an upper-tail or two-tail test when testing for the variance of a normal population. Select one: A. More information is needed. B. False O C. True.
Extracted text: Two different food preservatives are applied to different cuts of meat to see how many days they go before spoiling. Suppose 18 cuts of meat are treated with preservative A and 14 are treated with preservative B. The results are summarised as follows: Preservative Preservative A B Sample means 85.25 90.50 Sample standard deviation 11.45 9.55 To test if there is a difference in the population variances, the appropriate degrees of freedom (in the correct order) for the critical value are.. Select one: O A. 18, 14 В. 17, 13 ОС. 13, 17 D. 14, 18 When testing for the difference between two population proportions, if fo = 0.35, ny = 51, ny = 56 and fy= 0.39, what is the value of fy? (Hint: fo is the weighted average of the two sample proportions.) Select one: A. 0.29 В. 0.33 C. 0.31 D. 0.35 When looking at an F table, assuming that sy < sy, the appropriate degrees of freedom are.. select one: o a. ny + ny - 2 and numerator. b. nx as numerator and ny as denominator. o c. nx - 1 as numerator and ny - 1 as denominator. o d. nx - 1 as denominator and ny - 1 as numerator. an instructor is interested in the ability of students to predict their grades. the instructor claims that the population mean prediction is 80 percent. to verify this, ten students were asked to predict their grades with the following results... number of standard variable observations mean deviation prediction 10 74 6.8 if the instructor wants to test the claim at the 10 percent level of significance (with a corresponding critical value of 2.862), the appropriate test statistic and conclusion of the test are... select one: a. t= 2.790; do not reject ho- b. t= -2.790; reject ho. o c. t= -2.647; reject ho- od. t= -2.647; do not reject ho. sy,="" the="" appropriate="" degrees="" of="" freedom="" are..="" select="" one:="" o="" a.="" ny="" +="" ny="" -="" 2="" and="" numerator.="" b.="" nx="" as="" numerator="" and="" ny="" as="" denominator.="" o="" c.="" nx="" -="" 1="" as="" numerator="" and="" ny="" -="" 1="" as="" denominator.="" o="" d.="" nx="" -="" 1="" as="" denominator="" and="" ny="" -="" 1="" as="" numerator.="" an="" instructor="" is="" interested="" in="" the="" ability="" of="" students="" to="" predict="" their="" grades.="" the="" instructor="" claims="" that="" the="" population="" mean="" prediction="" is="" 80="" percent.="" to="" verify="" this,="" ten="" students="" were="" asked="" to="" predict="" their="" grades="" with="" the="" following="" results...="" number="" of="" standard="" variable="" observations="" mean="" deviation="" prediction="" 10="" 74="" 6.8="" if="" the="" instructor="" wants="" to="" test="" the="" claim="" at="" the="" 10="" percent="" level="" of="" significance="" (with="" a="" corresponding="" critical="" value="" of="" 2.862),="" the="" appropriate="" test="" statistic="" and="" conclusion="" of="" the="" test="" are...="" select="" one:="" a.="" t="2.790;" do="" not="" reject="" ho-="" b.="" t="-2.790;" reject="" ho.="" o="" c.="" t="-2.647;" reject="" ho-="" od.="" t="-2.647;" do="" not="" reject="">