Determining probability of selecting a non-senior

Assignment Help Basic Statistics

Reference no: EM1312129

Q1) Assume there are 15 males and 35 females in the class. Out of the 15 males, 6 are seniors. Out of the 35 females, 13 are seniors.

Assume you arbitrarily choose one person from the class.

a) Given that the student you choose is a senior, determine the probability of selecting a female?

b) Given that the student you choose is a senior, find out the probability of selecting a non-senior?

Q2) In 1992, FAA performed 86,991 pre-employment drug tests on job applicants who were to be occupied in safety and security-related jobs, and determined that 1,143 were positive.

(a) Create a 95% confidence interval for population proportion of positive drug tests.

(b) Why is normality assumption not problem, in spite of very small value of p?

Reference no: EM1312129

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