students; thus the total number of students in the sample equals:
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- .Pick the Test (Z-test, Single Sample T-test, Independent Sample T-test, Paired Sample Ttest, ANOVA): Suppose that two brands of gasoline were being compared for mileage. Samples of each brand were used in identical cars under identical conditions. Nine tests were made of Brand I and six tests of Brand II. Are the two brands significantly different? Test:Using the same question from #3 A survey is done to find out the favorite movies of 500 children. The children are categorized into male and female, and a sample of 50 children is chosen. Answer the following question: If the number of female children is 300, what is the sample size of each stratum? a male sample: 40 and female sample: 10 b male sample; 25 and female sample: 25 c male sample: 30 and female sample: 20 d male sample: 20 and female sample: 30The results: A. Are, or B. Are not significantly: A. High, or B. Low so there: A. is, or B. is not
- Dr. Kijowski is concerned about student phone use, so she collects information on the number of text messages that each student sent on a particular day. The boxplot below shows the results. Based on the boxplot, which of the following is the most reasonable conclusion? a. There are more people with data values below the median than there are people with data values above the median. Selected:b. There are more people with data values between the first quartile and the median than there are people with data values between the median and the third quartile.This answer is incorrect. c. There are fewer people with data values between the first quartile and the median than there are people with data values between the median and the third quartile. d. There are approximately the same number of people with data values between the first quartile and the minimum as there are people with data values between the third quartile and the maximum. e. The data are less spread out between the…Imagine a researcher asks a sample of five people to drive two types of cars and rate each of them on a scale of 1 to 25. The researcher wants to know: Is there is a difference in the ratings of the two types of cars. Below are the data collected: Type A: 20, 10, 11, 23, 7 Type B: 10, 11, 4, 12, 1 what type of T Test would be appropriateA newspaper article claims that 92 percent of teens use social media. To investigate the claim, a polling organization selected a random sample of 100 teens, and 96 teens in the sample indicated that they use social media. Given the data, why is it not appropriate to use a one-sample z-test for a proportion to test the newspaper’s claim? The random sample condition is not met. A The sample is more than 10% of the population. B The observed number of teens in the sample who do not use social media is less than 10. C The expected number of teens in the sample who do not use social media is less than 10. D The distribution of the population is not approximately normal.
- ٩.In a chi square goodness of fit test, a variable has 6 categories, and the sample size is 16. Calculate the degrees of freedom.Which of the following is the domain of a random variable? Choose the correct answer: a. set of whole numbers b. sample space c. set of real numbers d. subset of the outcomes of the experimentA statistical test is conducted to see if there is evidence that the proportion of US citizens who can name the capital city of Mexico is less than 0.6. Use the following possible sample results: Sample A: 19 successes out of 40 Sample B: 22 successes out of 40 Sample C: 24 successes out of 40 Sample D: 26 successes out of 40 State which of the possible sample results provides the most significant evidence for the claim. Sample B Sample D Sample C Sample A
- In a large city, 55% of people pass the drivers' road test. Suppose that every day, 200 people independently take the test a. What is the number of people who are expected to pass? The expected number is. (Round to the nearest whole number as needed.)A class of students each took a sample of 25 reeses pieces. These are their results: Orange Yellow Brown 17 7 7 15 8 2 11 7 7 7 8 10 14 4 7 13 7 5 15 4 6 11 6 8 13 7 5 7 4 14 14 4 7 Take a guess concerning the population proportion of orange candies. Is this the same as the proportion of orange candies from your original sample? Why or why not? Your origional sample is: Orange Yellow Brown 13 7 5 j) Create a 95% confidence interval for the population proportion of orange candies.Point estimate: ? from the class data Critical z value: Standard error:Margin of Error: Lower Bound:Upper Bound:Interpretation:k) Did your guess in…According to the M&M candy company, the expected proportion can be found in the table. In addition, the table contains the number of M&M's of each color that were found in a case of candy. At the 10% level, do the observed frequencies support the claim of M&M? M&M Observed and Proportions Brown Green Blue Orange Red Yellow Total 474 540 333 381 2734 Observed Frequencies 642 364 0.24 0.13 0.16 0.20 Expected Proportion 0.13 0.14 State the hypotheses. Ho: The observed frequencies are consistent with the distribution of colors for M&M candies. consistent with the distribution of colors for M&M candies. Ha: The observed frequencies are not Calculate the x² test statistic. Round expected values to two decimal places. Round x² to three decimal places. x² = Calculate the p-value. Round to four decimal places. p-value = State your decision. Since p-value?a, Select an answer Ho. Interpret the results. At the 10% signficance level there Select an answer enough evidence to conclude that the…
