According to a food website, the mean consumption of popcorn annually by Americans is 54 quarts. The marketing division of the food website unleashes an aggressive campaign designed to get Americans to consume even more popcorn. Complete parts (a) through (c) below. (a) Determine the null and alternative hypotheses that would be used to test the effectiveness of the marketing campaign. Ho: H;: (Type integers or decimals. Do not round.) (b) A sample of 900 Americans provides enough evidence to conclude that marketing campaign was effective. Provide a statement that should be put out by the marketing department. O A. There is not sufficient evidence to conclude that the mean consumption of popcorn has stayed the same. B. There is sufficient evidence to conclude that the mean consumption of popcorn has stayed the same. OC. There is sufficient evidence to conclude that the mean consumption of popcorn has risen. O D. There is not sufficient evidence to conclude that the mean consumption of popcorn has risen. (c) Suppose, in fact, the mean annual consumption of popcorn after the marketing campaign is 54 quarts. Has a Type I or Type Il error been made by the marketing department? If we tested this hypothesis at the a = 0.01 level of significance, what is the probability of committing this error? Select the correct choice below and fill in the answer box within your choice. (Type an integer or a decimal. Do not round.) O A. The marketing department committed a Type Il error because the marketing department rejected the null hypothesis when it was true. The probability of making a Type || error is

In a study assessing helping behavior among college students on their way to class, you recruit 10 students. You tell some participants that they are late for class and need to rush. You tell others they are right on time. Finally, you tell others they have lots of time before class. As they walk across campus, they come across a man (actually a confederate) who appears to need help. You measure the extent to which the participant noticed that the confederate needed help (1 = did not notice to 9 = really noticed). Which hypothesis test would you calculate? F test Independent sample t-test z test Dependent sample t-test

Do various occupational groups differ in their diets? A British study of this question compared 98 drivers and 83 conductors of London double-decker buses. The conductors' jobs require more physical activity. The article reporting the study gives the data as "Mean daily consumption (+ se)." Some of the study results appear below. Drivers Total calories 2821 +44 Alcohol (grams) 0.24 0.06 Conductors 2844 +48 0.39 ± 0.11 Construct a 99% confidence interval for the difference in mean daily alcohol consumption between drivers and conductors.

Which of the following is not equivalent to the other three? Choose the correct answer below. O Dependent variable Independent variable 000 O Predictor variable O Explanatory variable

Several friends charted a boat for a day's fishing. They caught a total of 51 fish. The table below provides information about the type and number of fish caught. determine the empirical probablity that the next fish caught is a flounder. Grouper - 15 Shark - 17 Flounder - 8 Kingfish - 11

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Lisa's scores on tests for the assessment class are 93, 89, 87, and 83. She needs an 89.5 average to obtain an "A" in the class. Assuming that all tests, including the final, are equally weighted, what score must she obtain on the final exam to earn an "A"? CA Vimsi l

Look at the histogram below, which shows mileage, in miles per gallon (mpg), for a random selection of older passenger cars. (a) Is the shape of the histogram essentially bimodal? Yes, because the histogram has one peak. Yes, because the histogram has two peaks.     No, because the histogram has one peak. No, because the histogram has two peaks. (b) Jose looked at the raw data and discovered that the 54 data values included both the city and highway mileages for 27 cars. He used the city mileages for the 27 cars to make the histogram below. (City.mpg is in photo at bottom) Using this information and the histograms shown above, construct a frequency table for the highway mileages of the same cars. Use class boundaries 16.5, 20.5, 24.5, 28.5, 32.5, 36.5, and 40.5.                     Class Boundaries                                  Frequency                                  -                                      -                                      -…

A survey was done where one question asked of the participants was, “How many meals per week do you typically eat at a restaurant”.  The numerical answers ranged from a low of 0 to a high of 12.  How could you ask a question that would treat this as a categorical variable?  Give the question and give the choices for the answer.