Preskoči na glavni sadržaj

Sign up for FREE

8.3 Exit Ticket - Normal Distributions

Posljednje ažuriranje about 3 hours ago

3 questions

Applicants for a job had to complete a mathematics test. The time they took to complete the test is normally distributed with a mean of 53 minutes and a standard deviation of 16.3. One of the applicants is chosen at random.

Obavezno

2

Pitanje 1

1.

Find the probability that this applicant took at least 40 minutes to complete the test.

Obavezno

2

Pitanje 2

2.

For 11% of the applicants it took longer than k minutes to complete the test. Find the value of k.

2

Pitanje 3

3.

There were 400 applicants for the job. Estimate the number of applicants who completed the test in less than 25 minutes.