A quality control inspector needs to know if customers are getting fewer ounces of a soft drink than the 28 ounces stated on the label. After the inspector collects data, she is going to conduct a hypothesis test. She should use       A. A two-tailed test.       B. A one-tailed test with the rejection region on the right tail.       C. A one-tailed test with the rejection region on the left tail.       D. Either a one-tailed or a two-tailed test.     Clear selection

Researchers investigated how the size of a bowl affects how much ice cream people tend to scoop when serving themselves. At an "ice cream social," people were randomly given either a 17-oz or a 34-oz bowl (both large enough that they would not be filled to capacity.) They were then invited to scoop as much ice cream as they liked. Did the bowl size change the selected portion size? The summaries are shown. Test an appropriate hypothesis and state your conclusions. For assumptions and conditions that you cannot test, you may assume that they are sufficiently satisfied to proceed. (Assume à significance level of 0.10.) A. Ho: HL-Hs=0 HA: HL-Hs #0 B. Ho: HL-Hs = 0 HA: HL-HS >0 OC. Ho: HL-Hs = 0 HA: HL-Hs <0 D. Ho: HL-Hs #0 HA: HL-Hs = 0 Compute the t-statistic. t= (Round to two decimal places as needed.) = - S Vi (0,0) Small Bowl n. 29 y S More 5.41 oz 1.83 oz Large Bowl n y S 22 6.28 oz 2.95 oz X

A professor believes that his math students have different IQ than the average college students. He collected the IQ scores of 30 students in his class. Then, he compared it to the average IQ score of college students. Provided below is the data that the professor gathered.Sample:Mean: 103 Std. Dev: 7 N: 30 Population: Mean: 100 Std. Dev: 5 A). What is the type of test you will use? (z-test, single-sample t-test, paired-samples t-test, or independent samples t-test) and why (what information provided in the problem) B). What are the hypotheses (Be Specific)

Please see below. I only have one attempt at this. I really need help with this.  Does duct tape work better than cryotherapy for removing warts in children and young adults? Of 26 patients treated with duct tape, 22 showed complete wart remission. In comparison, 15 of the 25 patients treated with cryotherapy achieved complete wart remission. Which test is most appropriate for this scenario? A. 2-sample test for means B. 1-sample z-test for proportions C. 2-sample test for proportions D. matched-pairs  E. 1-sample t-test for means

The midterm and final exam grades for a statistics course are provided in the data set below. Jaymes, a student in the class, scored 86 on both exams. Treat the given data sets as samples. Midterm: 80, 78, 85, 82, 79, 79, 78, 86, 80, 84, 78, 84, 80, 84, 81, 78, 81, 82, 78, 84 Final: 81, 88, 68, 69, 69 81, 82, 86, 76, 71, 72, 68, 77, 86, 68, 83, 84, 71, 81, 87 z-score for midterm: 1.857 z-score for final: 1.181 Based on the z-scores calculated above, which of Jaymes's grades is more unusual, the midterm grade or the final exam grade? Select the correct answer below: A. The absolute value of the z-score for the final exam grade is greater than for the midterm grade, so the final exam grade is more unusual. B. The absolute value of the z-score for the midterm exam grade is less than for the final grade, so the midterm grade is more unusual. C. The absolute value of the z-score for the midterm exam grade is greater than for the final grade, so the midterm grade is more…

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Find the standardized test , z to test the claim that p1 = p2. The sample statistics listed below are from independent samples.

Researchers investigated how the size of a bowl affects how much ice cream people tend to scoop when serving themselves. At an "ice cream social," people were randomly given either a 17-oz or a 34-oz bowl (both large enough that they would not be filled to capacity.) They were then invited to scoop as much ice cream as they liked. Did the bowl size change the selected portion size? The summaries are shown. Test an appropriate hypothesis and state your conclusions. For assumptions and conditions that you cannot test, you may assume that they are sufficiently satisfied to proceed. (Assume à significance level of 0.10.) Identify the null and alternative hypotheses. Choose the correct answer below. A. Ho: HL-Hs = 0 HA: HL-Hs #0 B. Ho: HL-Hs = 0 HA:HL-HS >0 O C. Ho: HL-Hs = 0 HA: HL-HS <0 D. Ho: HL-Hs #0 HA:HL-Hs = 0 Compute the t-statistic. ... t = (Round to two decimal places as needed.) Small Bowl n. 29 y S 5.41 oz 1.83 oz Large Bowl n y S 22 6.28 oz 2.95 oz 14( 18( 12

A boxplot of some data is as follows. 20 40 60 50 100 120 Using this boxplot, answer the following questions. What is the lower quartile? What is the upper quartile? Choose... Choose... Is the boxplot left-skew, symmetric or right-skew? Choose...

The average house has 15 paintings on its walls. Is the mean larger for houses owned by teachers? The data show the results of a survey of 16 teachers who were asked how many paintings they have in their houses. Assume that the distribution of the population is normal. 18, 15, 17, 14, 16, 17, 18, 15, 15, 14, 14, 14, 15, 15, 16, 18 What can be concluded at the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Но: Select an answer v H1: Select an answer v c. The test statistic ? v = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? va f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the population mean is not significantly more than 15 at a = 0.05, so there is sufficient evidence to conclude that the population mean number of paintings that are in…