A researcher wants to estimate the number of teachers who have changed careers after their first year of teaching. How many 1st year teachers does he need to sample in order to be 95% confident that his estimate for the mean number of teachers will be within 3 teachers of the true mean? The standard deviation is 2 teachers.

For each proportion find the unknown number x 1/5/8=×/15

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes

Question 14 (1 point) larry deposits $15 a week into a savings account. his balance in his savings account grows by a constant percent rate.