A confidence interval was used to estimate the proportion of statistics students who are female. A random sample of 72 statistics students generated the following 90 confidence interval: (0.438, 0.642).
Based on the interval, is the population proportion of females equal to 58?
A) Yes, and we are 90 sure of it.
B) Maybe. 58 is a believable value of the population proportion based on the information above.
C) No, the proportion is 54.
D) No, and we are 90 sure of it.
Q. 2
The number of traffic accidents that occur on a particular stretch of road during a month follows a Poisson distribution with a mean of 6.5. Find the probability that fewer than two accidents will occur on this stretch of road during a month.
What will be an ideal response?
Q. 3
In an experiment with 10 treatments, how many pairs of means can be compared?
A) 45 B) 20 C) 90 D) 100
Q. 4
A confidence interval was used to estimate the proportion of statistics students who are female. A random sample of 72 statistics students generated the following 99 confidence interval: (0.438, 0.642).
State the level of reliability used to create the confidence interval.
A) between 43.8 and 64.2 B) 99
C) 64.2 D) 72
Q. 5
A certain baseball player hits a home run in 7 of his at-bats. Consider his at-bats as independent events. Find the probability that this baseball player hits at most 42 home runs in 800 at-bats?
A) 0.0307 B) 0.93 C) 0.9693 D) 0.07
Q. 6
A small life insurance company has determined that on the average it receives 4 death claims per day. Find the probability that the company receives at least seven death claims on a randomly selected day.
What will be an ideal response?
Q. 7
The number of homeruns hit during a major league baseball game follows a Poisson distribution with a mean of 3.2. Find the probability that a randomly selected game would have exactly 5 homeruns hit.
A) 0.895 B) 0.105 C) 0.114 D) 0.219