Questions attached

The table below gives the average high temperatures in January and July for 12 random cities in a region with 164 cities. Write a 95% confidence interval for the mean temperature difference between summer and winter in the region. Mean High Temperatures City A B C D E F G ( " F ) July 73 71 76 H 74 90 87 J K L Jan. 36 37 69 89 42 34 74 67 52 52 75 40 86 48 45 44 The confidence interval is (].D) 20 39 (Round to one decimal place as needed.)Do these data suggest that there is a signicant difference in Calories-\"Sewing calories between servings of strawberry and vanilla yogurt? Test an Brand Strawberry appropriate hypothesis and state your conclusion. Don't forget to 1 210 check assumptions and conditions! Remove any outliers before 2 100 performing the test. 3 1m 4 110 5 120 E 130 Select appropriate hypotheses for testing. 0 A. Ho: There is a difference in calories between strawberry and vanilla yogurt. HA: There is no difference in calories between strawberry and vanilla yogurt 0 B. Ho: There is no difference in calories between strawberry and vanilla yogurt. H A: There is a difference in calories between strawberry and vanilla yogurt. 0 6. Ha: There is no difference in calories between strawberry and vanilla yogurt. HA: Strawberry yogurt has more calories than vanilla yogurt. Compute the test statistic. Use Strawberry Vanilla as the difference. The test statistic is |:|. [Round to three decimal places as needed.) Find the Pvalue. The Pvalue is D [Round to four decimal places as needed.) Vanilla 210 110 130 SD 140 140 Brand 10 11 12 Caloriesi'Serving Strawberry lv'anilla 200 140 130 150 140 130 120 150 130 150 160 1m % Researchers wanted to see if a certain image in ads affected people's ability to remember the item being advertised. They found two ads for each of 10 similar items, one with the image and one without Then they showed the ads to 10 randomly selected people for one minute and asked them to list as many of the items as they could. The results for the number of items remembered are shown in the table below. Is there evidence that the image mattered? Use or = 0.05. Bu bject 1 2 3 4 5 6 7 I! 9 10 g. Image 1 5 5 E 4 6 3 6 3 1 No image I [l 3 5 B 4 E 4 5 4 3 Identify the null and alternative hypotheses. Choose the correct answer below. A. H0:|,Ld=[l OB. H0:|,Ld=[l Hzpdii Hzpdco OB. Hozpdii CID. Hozpd