Question

18. The weight of crackers in a box is estimated to be 17 ounces. The amount that the packaging machine puts in the boxes is believed to have a Normal model with a mean of 16.85 ounces and a standard deviation of 0.4 ounces. What is the probability that the weight of a case of crackers is below 17 ounces? B) 0.99C) 0.65 A) 2.37 D) 0.0089E) None of the Above 19. Determine if the given value is a statistic or a parameter: a sample of 68 dogs at the Humane Society has a mean age of 2 yrs 8 months E) None of the Above B) Sample C) Statistic D) Population A) Parameter 20. Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate: the salaries of 37 randomly selected CEO's A) Nominal B) Interval C) Ratio D) Ordinal E) None of the Above 21. A random sample of 12 students at a college has a mean GPA of 2.6 with a standard deviation of O. 3 Find the 99% confidence interval for the true mean GPA of all students. A) (2.44, 2.76) B) (2.41, 2.79) C) (2.46, 2.74) D) (2.33, 2.87) E) None of the Above 22. A disgruntled student claims that pretty much everybody failed the test, that the average was below 60. A random sample of 14 tests had a mean of 59 and a standard deviation of 1.2. Is there enough evidence to support the student's claim? Use a = 0.05 A) IEETR B) IEETS C) NEETR D) NEETSE) None of the Above

Answer 1

b.4 S evidence to support Plwc17) e/w- 16.85 17-16.85) P(240 1.375) 0.65 19) statistic. 20 Ratio a because the ratio of employee significant 20 2-6 t 0.3 X 3.106 JIZ I 0.269 (2.33 2.87 t- 5 - u 59-60 - 3.118 critical t > O.OS with 13 df is -1.771 - 3.118 < -1.771 1-2/ There enough the claim.