The continuity correction factor is the name given to the .5 adjustment necessary when estimating the binomial with the normal distribution.
A) True B) False
Q. 2The university police department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with a mean of 8.9.
Find the probability that exactly four tickets are written on a randomly selected day.
A) .964344 B) .058433 C) .941567 D) .035656
Q. 3A study of college students stated that 25 of all college students have at least one tattoo. In a random sample of 80 college students, let x be the number of the students that have at least one tattoo.
Can the normal approximation be used to estimate the binomial distribution in this problem?
A) Yes B) No
Answer the question True or False.
Q. 4A newspaper reported on the topics that teenagers most want to discuss with their parents.
The findings, the results of a poll, showed that 46 would like more discussion about the family's financial situation, 37 would like to talk about school, and 30 would like to talk about religion. These and other percentages were based on a national sampling of 545 teenagers. Estimate the proportion of all teenagers who want more family discussions about school. Use a 90 confidence level.
A) .63 .034 B) .37 .034 C) .37 .001 D) .63 .001
Q. 5The university police department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with a mean of 9.2.
Find the probability that fewer than six tickets are written on a randomly selected day.
A) 0.189165 B) 0.104074 C) 0.810835 D) 0.895926
Q. 6Which of the following is not a condition required for a valid ANOVA F-test for a completely randomized experiment?
A) The samples are chosen from each population in an independent manner.
B) The variances of all the sampled populations are equal.
C) The sample chosen from each of the populations is sufficiently large.
D) The sampled populations all have distributions that are approximately normal.
Q. 7When the points on a normal probability plot lie approximately on a straight line, the data are approximately normally distributed.
A) True B) False
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