In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 38 and a standard deviation of 8. Using the Standard Deviation Rule (as presented in the book), what is the approximate percentage of daily phone calls numbering between 30 and 46?

A successful basketball player has a height of 6 feet 11 ​inches, or 211 cm. Based on statistics from a data​ set, his height converts to the z score of 5.17. How many standard deviations is his height above the​ mean?

The distribution of the student heights at a large college is approximately bell shaped. If the mean height is 66 inches,and approximately 95% of the heights fall between 32 and 100 inches, then, the standard deviation of the heightdistribution is approximately equal to

Suppose the exam average in a class is 82% with a standard deviation of 6. What proportion of students scored below 88%? Round to two places.

Consider the following data of 10 exams scores: 28, 57, 58, 64, 69, 74, 79, 80, 83, 85 1. The the mean, median, and mode       2. find the standard deviation without a graphing calculator. Show all your computations

Suppose there is a city where the mean cost per month of a one-bedroom apartment is $1,500, with a standard deviation of $250.  Approximately what percentage of one-bedroom apartments in the city cost between $750 and $1,000?

If the weight of fertilizer in a 40-pound bag is normally distributed with a standard deviation of 0.5 pounds, what is the range of weights of bags of fertilizer within two standard deviations of the mean?

The average McDonald's restaurant generates $2.6 million in sales each year with a standard deviation of 1. Tatiana wants to know if the average sales generated by McDonald's restaurants in Alaska is different than the worldwide average. She surveys 25 restaurants in Alaska and finds the following data (in millions of dollars):3.2, 1.8, 0.9, 3.2, 3.6, 1.7, 4.2, 2, 3.1, 3.9, 3, 2.9, 2.5, 3.5, 3, 3, 2.4, 5, 3.8, 0.9, 2.2, 2.4, 2.6, 2.8, 3.3Perform a hypothesis test using a 10% level of significance.  Find the pp-value of the point estimate. P(p(    <or >    )=  P(z<)=P(    ?    )=)=? p value =?pp-value==

A sample of 75 will be drawn from a population of test takers with a mean of 150 and standard deviation 9. Find the 85th percentile.

The ages of the employees at Solar Systems, Inc. is normally distributed with a mean of 32.7 years and a standard deviation of 1.8 years. What percentage of employees at Solar Systems, Inc. are younger than 30 years old? Round your answer to the nearest tenth of a percent.