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- A vehicle quality survey asked new owners a variety of questions about their recently purchased automobile. One question asked for the owner's rating of the vehicle using categorical responses of average, outstanding, and exceptional. Another question asked for the owner's education levels with the categorical responses some high school, high school graduate, some college, and college graduate. The sample data below are for owners who had recently purchased an automobile. Quality Rating Average Outstanding Education Some HS 35 45 HS Grad 20 30 45 Some College 25 20 50 30 College Grad Exceptional With two different methods, test to see if the proportions of Average are same between Some HS and College Grad. You must state the hypotheses, test statistics, p-value, and conclusion, etc. 60 90 65The contingency table below shows the blood types of a sample of patients cross classified by gender. How many women with blood type AB would you expect if there was no association between these two variables? A AB Total Female 42 55 11 4 112 Male Total 55 43 16 120 97 98 27 10 232 O 5.2 O 10 O 4.8 4.Four different beverages are sold at a fast-food restaurant soft drinks, tea, coffee, and bottled water. Answer parts (a) and (b) a. Explain why the type of beverage sold is an example of a categorical variable. Choose the correct answer below OA Type of beverage sold is a categorical variable because the values of the variable arise from a measuring process OB. Type of beverage sold is a categorical variable because the values of the variable can only be placed into categories OC. Type of beverage sold is a categorical variable because the values of the variable arise from a counting process OD. Type of beverage sold is a categorical variable because the values of the variable represent quanteles b. Explain why the type of beverage is a nominal-scaled variable Choose the correct answer below OA Type of beverage sold is a nominal-scaled variable because there are no rankings for the different values of the vanable OB Type of beverage sold is a nominal-scaled variable because the…
- Sophomore, junior, and senior students at a high school will be surveyed regarding a potential increase in the extracurricular student activities fee. There are three possible responses to the survey question - agree with the increase, do not agree with the increase, or no opinion. A chi-square test will be conducted to determine whether the response to this question is independent of the class in which the student is a member. How many degrees of freedom should the chi-square test have?2. Do men with more children have higher blood pressure? In a study, blood pressures of men with more than three children were compared with those of men with three or fewer children. Which of the following is true for this study? a) The response variable is blood pressure. O b) The explanatory variable is blood pressure. c) The explanatory variable is number ofchildren ("more than three" vs. "three or fewer"). d) Both a and c ENGExpress the alternative hypothesis in symbolic form. A psychologist claims that the mean amount of time (in hours) that females spend in talk therapy is more than that of men. Assume that two samples are independent. Let the female talk therapy times be the first population and the male talk therapy times be the second population.
- You are to submit 2 real life examples of statistical statements and state if they are biased or unbiased Example: A toothpaste advertisement states that 3 or 4 people prefer their product. This could be a biased survey, one that is not based on a random sample. They could have asked exactly 4 people about their product. An unbiased sample accurately represents the population. Each member of the population is equally to be chosen Example: A person wants to find out how many people prefer chocolate of vanilla ice cream. To get an unbiased sample, she would pick out a few of the ice cream shops in her town and survey people leaving the establishment.A high school track coach wanted to test whether giving the students an energy drink could affect performance during the 100 meter race. The coach split the 26 boys into two equal sized groups, where Group 1 was given the energy drink and Group 2 was not. The 100 meter race times were recorded during practice and shown in the table below. What inference can be made about the results? Group 1 Group 2 12.2 13 12.5 12.3 13.3 12.8 12.9 13 13 13.8 12.1 13 13 13 13 13 12.1 13 13 13 12.1 13 12.8 13 13 12.6 Mean: 12.7 Mean: 13 Since the simulation shows ( many cases or free cases )? where a mean difference of ( solve for this answer ) or less occurred when the groups were re-randomized, it can be inferred that the mean difference observed in the study was ( very possibly or very unlikely ) ?due to the random assignment of participants into groups, so the results of the study are (…A student compared organic food prices at Grocery 1 and Grocery 2. The same items were priced at each store. The first three items are shown in the accompanying Figure A. Choose the correct accompanying output (B or C) for the appropriate test, explaining why you chose that output. Then test the hypothesis that the population means are not equal using a significance level of 0.05. Assume i Figure A and Outputs Click the icon to view Figure A and the outputs. Which is the correct output (B or C) for the appropriate test? Explain. (Figure A) Food Grocery 1 0.89 Grocery 2 0.99 A. Output B is appropriate because the data are paired samples. Bananas/1 Ib Grape tomatoes/1 Ib Russet potato/5 Ib 4.19 4.49 B. Output C is appropriate because there are two samples. 4.69 4.49 C. Output B is appropriate because n2 25. (Figure B) D. Output C is appropriate because the data are independent samples. N Mean StDev SE Mean Test the hypothesis that the population means are not equal using a significance…
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