Statistics and Probability Answers

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Find the z-score such that the area under the standard normal curve to the right is 0.11.

A recent study by the American Accounting Association revealed among 30 graduates in accounting 20 students graduating with a major in accounting select public accounting. Suppose we select a sample of 15 recent graduates.

What is the probability that exactly two select public accounting?

What is the probability that exactly five select public accounting?

An aptitude test for selecting officers in a bank was conducted on 1,000 candidates, the average score is 42 and the standard deviation of scores is 24. Assume that the scores are normally distributed, answer the following questions.

What is the probability that the candidates score,

Exceed 65?

Between 40 and 60?

Find the number of candidates whose score,

Exceed 40?

Lie between 40 and 65?

average score is 42 and the standard deviation of scores is 24. Assume that the scores are

normally distributed answer the following questions

What is the probability that the candidates score

A. Exceed 65

B Between 40 and 60

Find the number of candidates whose score

A Exceed 407

A sample of students from an introductory psychology class were polled regarding the number of hours they spent studying for the last exam. The data was used to make inferences regarding the other students taking the course. There data are below:

8 22.7 14.5 9 9 3.5 8 11 7.5 18

20 7.5 9 10.5 15 19 9 8.5 14 20

Compute a 99% confidence interval.

(3,5,7,9).(3,5,7,9).

[[ Set B ]]

1. Find ALL possible samples of size 2 which can be drawn with replacement from the population.
2. Solve for the mean μ
3. x
4. μx of the sampling distribution of means.
5. Solve for the variance σ
6. x
7. 2
8. σx2 of the sampling distribution of means.
9. Solve for the standard deviation σ
10. x
11. σx of the sampling distribution of means.

Round all answers to the nearest hundredths.

A supermarket owner believes that the mean income of its customers is P50,000 per month. One-hundred customers are randomly selected and asked about their monthly income. The sample mean is P48,500 per month and the standard deviation is P3,200. Is there sufficient evidence to indicate that the mean income of the customers of the supermarket is P50,000 per month? Use α == 0.05.

If x represents the number of voys in a family of 7 children, find the probabbility and distribution

Ms Pitts and Mr Oduse are statistics lecturers. Ms Pitts spends 62% of her day in the stats department. Mr Oduse spends 57% of his day in the stats department. Forty-two (42) percent of the time Ms Pitts and Mr Oduse can both be found in the stats department.

Question 15

What is the probability that only one of these lecturers will be in the stats department when you go to have a consultation?

Question 16

What is the probability that neither of the two lecturers will be in the stats department?

Question 17

What is the probability that only Mr Oduse will be in the stats department?