A telemarketing agency uses equipment that dials residential phone numbers in that a city at random Of the rst 200 numbers dialed, 67 are unlisted. This is not surprising because 30% of all phone numbers are unlisted. Are the numbers 67 and 30% parameters or statistics? A. 67 is a parameter and 30% is a statistic. B. 30% is a parameter and 67 is a statistic. C. 67 and 30% are both parameters. D. 67 and 30% are both statistics. Consider the following box-and-whisker plot: HE 10 20 45 65 80 Approximately what percent of the data lies between 45 and 80? A. 25 B. 35 C. 50 D. 75 3. Which of the following is a biased survey question about the rating of a book? A. Is this an enjoyable book? B. On a ve-point scale, how would you rate this book? C. Would you recommend this book to a friend? D. Is this boring book too long? A survey is conducted where a proportional number of students from each grade level in the school are surveyed. Which sampling method best describes this sampling technique? Stratied Sampling Clustered Sampling Convenience Sampling papa? Simple Random Sampling 5. The student population of Pablo Art School this year is given in the table. Girls Boys Total Grade 10 150 250 400 Grade 11 200 100 300 Grade 12 225 175 400 Total 575 525 1100 If a student is selected at random from this school find the probability that the student is not a Grade 11 girl. A. B. 11 C. D.Using the Standard Normal (2) Distribution Table, what is the area under the standard normal curve to the left of 1.25? A. 0.1056 B. 0.3944 C. 0.6056 D. 0.8944 Last year a plumber earned on average $250 per day, and she thinks she is already making more money this year. To test her theory, she randomly selects 10 days from this year and performs a hypothesis test. What parameter is she testing? A. The true proportion of customers who returned this year. B. The true mean difference in daily revenue this year versus last year. C. The true mean daily revenue being generated this year. D. The true mean daily revenue that is generated last year JJ&P Corporation makes jams, jellies and fruit preserves. A supervisor of a manufacturing facility wants to know if there is a difference in the proportion of leaky jar lids produced by two different machines. Of a random sample of 200 lids from each machine, 10 from Machine #1 were leaky and 14 from Machine #2 were leaky. Determine if there a significant difference in the proportion of leaky lids produced by the two machines. Use a 0.05 level of significance. Assuming the 90% confidence interval for p1 - P2 is [-0.09 to +0.03], what are the decision and conclusion of the test at the significance level of 0.10? A. Fail to reject the null hypothesis, conclude there is insufficient evidence of proportion difference between two machines. B. Reject the null hypothesis, conclude there is evidence of proportion difference between two machines. C. Reject the null hypothesis, conclude there is no evidence that the proportion of Machine #1 is greater than Machine #2. D. Reject the null hypothesis, conclude there is insufficient evidence of proportion difference between two machines.9. Researchers in education are performing a study to see if listening to soothing music while taking a standardized math test increases the mean test score. The hypotheses are Ho: H = 79 versus Ha: H > 79, and the p-value for the hypothesis test was 0.035. At the 5% significance level, what should the researchers conclude? A. There is sufficient evidence to conclude that listening to soothing sounds increases the mean test score. B. There is insufficient evidence to conclude that listening to soothing sounds increases the mean test score. C. There is insufficient evidence to conclude that listening to soothing sounds decreases the mean test score. D. none of the above10. For which of the following hypotheses tests is the p-value the same whether the sample mean is 44 or 46? I. Ho: H = 45 Ha: H # 45 II. Ho: H = 45 Ha: ( > 45 III. Ho: H = 45 Ha: u