Question

20) olesterol levels (in milligrams per deciliter) of 30 adults are listed below. Find Q1 154 156 165 165 170 171 172 180 184 185 189 189 190 192 195 198 198 200 200 200 205 205 211 215 220 220 225 238 255 265 A) 180 D) 184.5 C) 171 B) 200 21) Find the P-value for the hypothesis test with the standardized test statistic z. Decide whether to reject Ho for the level of significance a Right-tailed test z 052 α-005 B) 0.3015; Fail to reject Ho D) 0.0195, Reject Ho A) 0.3015; Reject Ho C) 0.6030; Fail to reject Ho 22) 22) Find the critical value zc that corresponds to a 95% confidence level. D) +2.575 C) +2.33 B) +1.96 A) +1.645 23) Classify the events as dependent or independent. The events of getting two aces when two 23) cards are drawn from a deck of playing cards and the first card is not replaced before the second card is drawn. B) independent 24) The mean score for all NBA games during a particular season was less than 105 points per game. If a hypothesis test is performed, how should you interpret a decision that fails to reject the null hypothesis? A) There is sufficient evidence to support the claim μ < 105. B) There is not sufficient evidence to reject the claim μ < 105 C) There is sufficient evidence to reject the claim μ < 105. D) There is not sufficient evidence to support the claim-105. 24) 25) Find the sample standard deviation 25) 15 42 53 79 12 14 28 47 A) 15.8 B) 29.1 C) 16.6 D) 17.8 26) Assume that the heights of men are normally distributed with a mean of 69.6 inches and a 26) standard deviation of 3.5 inches. If 100 men are randomly selected, find the probability that they have a mean height greater than 70.6 inches. A) 08188 B) 9.9671 C) 0.9005 D) 0.0021 27) An elementary school claims that the standard deviation in reading scores of its fourth grade students is less than 3.65. Determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed. A) right-tailed 27) B) two-tailed C) left-tailed C-4

Answer 1

21)

p value=P(Z>0.52)=P(Z<-0.52) = 0.3015           [ Excel formula =NORMSDIST(z) ]

since, p value >α=0.05, fail to reject Ho

so, answer is option B)