-ANSWER 1 OPTION ONLY FROM A B C D (MULTIPLE CHOICE QUESTIONS)

Post by **answerhappygod** » Tue Jul 12, 2022 11:29 am

-ANSWER 1 OPTION ONLY FROM A B C D (MULTIPLE CHOICEQUESTIONS)

: Answer 1 Option Only From A B C D Multiple Choice Questions 1 (393.81 KiB) Viewed 40 times

: Answer 1 Option Only From A B C D Multiple Choice Questions 2 (240.92 KiB) Viewed 40 times

1. What does a normal distribution curve look like? A. Half curve B. Round curve C. Bell curve D. Square curve 2. A Small, Medium and Enterprise company's average number of bankruptcy each week is 6.4, with a standard deviation of 1.5. In what percentage of weeks do you expect to have fewer than five bankruptcy? A. 0.6915 B. 0.1762 C. 0.8238 D. −0.93 3. The z-score indicates.... A. the amount of standard deviations a data value is above or below the mean. B. the percentile the data value is above or below the mean. C. the amount of standard deviations a data value is above or below the median. D. the percent the data value is above or below the mean. 4. Female long jumpers leap a mean of 263 inches and a standard deviation of 14 inches, which are approximately normal. Consider a 75th percentile jump by a girl long jumper. What was the duration of her leap? A. 0.67 inch B. 263 inches C. 272.44 inches D. 277.25 inches 5. A product life-span is normally distributed, with a mean of 12 days and a standard deviation of three days. What percentage of items have a life-span of 12 to 15 days? A. 68% B. 34% C. 16% D. 2.5%
6. The average number of accidents per week in a country is 9.6 with a standard deviation of 1.3. What part of the week do you expect to have fewer than 10 accidents? A. 0.6179 B. 0.6217 C. 0.3783 D. 0.3783 7. The standard deviation for teenage female waist size is 2.2 inches. Estimate the percentage of adolescents who will have a waist size more than 30 inches if waist sizes are regularly distributed. A. 96.5%
8. The typical life of an automobile break pad is 30,000 kilometres. 2,000 km is the standard deviation. Then, 68 percent of all brake pads will last between kilometres and kilometres. A. 28,000 and 32,000 B. 24,000 and 34,000 C. 26,000 and 34,000 D. 27,000 and 31,000 9. According to a previous study of 750 Internet users in Malaysia, men made up 35% of the total. What is the 95% confidence interval for the true percentage of Malaysian men who use the Internet? A. 0.321<p<0.379 B. 0.316<p<0.384 C. 0.309<p<0.391 D. 0.305<p<0.395 10. A total of 28% of Faculty of Computing and Informatics students anticipate Friday will be wet. You poll 50 students and discover that 15 of them predict Friday will be wet. What does the number 50 mean? A. n B. P C. p-hat D. standard deviation 11. Calculate the Margin of Error if n=120 and p−hat=0.70 with a confidence level of 90%. A. 0.0029 B. 0.0704 C. 14.4876 D. 0.082 12. What sample size is needed to ensure our margin of error is 5% at 95% confidence level. P− hat =0.25. A. 289 B. 277 C. 140 D. 98
13. Increasing the sample size the confidence interval. A. increases B. decreases C. does not affect D. there is not enough evidence to determine the answer 14. In a recent research, 42 youngsters watched an average of 19.6 hours of television per week. Assume that the population's standard deviation is 5.8 hours. Find the population mean's 98 percent confidence interval. A. (14.1,23.2) B. (18.3,20.9) C. (17.5,21.7) D. (19.1,20.4)
15. The average height of ten guys who were chosen at random was determined to be 63.4 inches. The standard deviation of is 2.4, and the height measurement population is a normal distribution, according to the prior study. Create a 95% confidence interval around the population mean. A. (61.9,64.9) B. (58.1,67.3) C. (59.7,66.5) D. (60.8,65.4) 16. The annual energy cost of a refrigerator was reported in the newspaper. According to the article, a sample standard deviation of $3.90 was found in 14 randomly selected refrigerators. Build a confidence interval for the population standard deviation using the 99 percent confidence level. A. 2.575<σ<7.447 B. 6.631<σ<55.464 C. 14.097<σ<198.862 D. 198.724<σ2<39546 17. The null and alternative hypotheses can be the same. A. Yes B. No C. Maybe D. All the above 18. H0:μ=k H1:μ=k A. Left-tailed test B. Two-tailed test C. Right-tailed test D. No-tailed test 19. H0:μ=k H1:μ<k A. Left-tailed test B. Two-tailed test C. Right-tailed test D. No-tailed test
20. What are the steps in the hypothesis testing procedure? A. State the hypotheses and identify the claim - Find the critical value - Compute the test value Summarize the results - Make the decision (reject or not reject) B. State the hypotheses and identify the claim - Compute the test value - Find the critical value Make the decision (reject or not reject) - Summarize the results C. State the hypotheses and identify the claim - Find the critical value - Compute the test value Make the decision (reject or not reject) - Summarize the results D. State the hypotheses and identify the claim - Compute the test value - Find the critical value Summarize the results - Make the decision (reject or not reject) 21. A 5% level of significance means that: A. There's a 5% chance we're wrong B. There's a 5% chance we'll be wrong if we fail to reject the null hypothesis C. There's a 5% chance we'll be wrong if we reject the null hypothesis. D. There's a 5% chance you'll get an A on the test.
22. In a hypothesis test with a null hypothesis, μ=6.9, a sample of 16 items was randomly selected. The mean of the sample was 7.1, while the standard deviation was 2.4. At a=.05., It is reasonable to assume that the population is a normal distribution. A. Reject Ho B. Reject Ha C. Fail to reject Ho D. Fail to reject Ha 23. According to a grocery store, the average line wait time is less than 1.9 minutes. The mean time for a random sample of 20 clients was 1.7 minutes, with a standard deviation of 0.8 minutes. If a=0.05, use the P-value to test the food store claim. A. Reject Ho B. Reject Ha C. Fail to reject Ho D. Fail to reject Ha 24. What does the term "null hypothesis" mean? A. The independent variable has no effect on the dependent variable for the population B. The independent variable does have an effect on the dependent variable C. The dependent variable has no effect on the independent variable D. The dependent variable does have effect on the independent variable 25. What does it indicate when your confidence level is 95% ? A. 95 percent of the times the researcher is correct B. 95 percent of the time the researcher can get the correct data C. 95 percent of the time the researcher cannot go wrong D. None of the above