Statistics and Probability Answers

Members of the urban poor receive an average of ₱110 per day with a standard deviation of ₱20. If a random sample of 25 people is taken, what is the approximate mean of the sampling distribution?

Members of the urban poor receive an average of ₱110 per day with a standard deviation of ₱20. If a random sample of 25 people is taken, what is the approximate mean of the sampling distribution?

a school administrator claims that less than 50% of the students of the school are dissatisfied by the community cafeteria service. Test this claim by using sample data obtained from a survey of 500 students of the school where 54% indicated their dissatisfaction of the community cafeteria service. use a 0.05

limh→ 0 (6+h)

2−36

h

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