# The time it takes to train a newly hired telephone sales representative is normally distributed with...

The time it takes to train a newly hired telephone sales representative is normally distributed with a mean of 136 hours and a standard deviation of 8.9 hours.

What time represents the 20th percentile of the times to train a newly hired telephone sales representative?

Z score for 20th percentile = Z20 = -0.84

Z = (X - mean) / sd

or, X = mean + Z * sd

or, X = 136 - 0.84 * 8.9

or, X = 128.5 hours

##### Add Answer of: The time it takes to train a newly hired telephone sales representative is normally distributed with...
Similar Homework Help Questions
• ### The patient recovery time from a particular surgical procedure is normally distributed with a mean of...

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.5 days and a standard deviation of 1.6 days. What is the 85th percentile for recovery times? (Round your answer to two decimal places.) Is there a way to do it on TI-84? Please show steps!

• ### 2. The time it takes you to come to school is approximately normally distributed with a...

2. The time it takes you to come to school is approximately normally distributed with a mean of 45 minutes and a standard deviation of 3 minutes. What time must you leave home in the morning so that you are 95% sure of arriving at school by 9:00 AM? (5 pts.) ISCQ5 STAT120SLW15

• ### The time it takes to assemble a component on a factory assemble line is normally distributed...

The time it takes to assemble a component on a factory assemble line is normally distributed with a man of 3.1 minutes and a standard deviation of 0.6 minutes. Find the probability that a randomly selected employee will take between 2.0 and 2.3 minutes? Answer In a Sentence Question 7: The following data gives the information of the number of children that could complete an activity in the specified time. Construct a histogram with probabilities. Time No. of Children 30...

• ### The time it takes a student to cycle to school is normally distributed with a mean of 15 minutes and a variance of 2

1. The time it takes a student to cycle to school is normally distributed with a mean of 15 minutes and a variance of 2. The student has to be at school at 8.00a.m. At what time should the student leave her house so that she will be late only 4% of the time?2. In a study for Health Statistics, it was found that the mean height of female 20-25 years old was 64.1 inches. If height is normally distributed...

• ### The patient recovery time from a particular surgical procedure is normally distributed with a mean of...

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 4 days and a standard deviation of 1.8 days. Let X be the recovery time for a randomly selected patient. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-N | b. What is the median recovery time? days c. What is the Z-score for a patient that took 5.7 days to recover? d. What is the...

• ### The finishing times for a long-distance race are normally distributed, with an average finishing time of...

The finishing times for a long-distance race are normally distributed, with an average finishing time of 3.25 hours and a standard deviation of 0.5 hours. If Bob is running this race, what time does heed to finish in order to beat 80% of the other participants? Full step by step on how to complete. On Ti-84 and by hand.

• ### 15) Assume that z scores are normally distributed with a mean of 0 and a standard...

15) Assume that z scores are normally distributed with a mean of 0 and a standard deviation 15) of 1. If P(z> c) 0.109, find c. olve the problem. 16) 16) Scores on an English test are normally distributed with a mean of 37.4 and a standard deviation of 7.9. Find the score that separates the top 59% from the bottom 41% 17) Suppose that replacement times for washing machines are normally distributed with a 17) mean of 10.9 years...

• ### The wait time for a table at a particular restaurant are normally distributed, with a mean...

The wait time for a table at a particular restaurant are normally distributed, with a mean of 25 minutes. Seventy-five percent of the parties who dine there wait less than 30 minutes for a table. What is the standard deviation of wait times at the restaurant?What percent of the parties wait for more than 15 minutes?

• ### The time required to assemble an electronic component is normally distributed with a mean and a...

The time required to assemble an electronic component is normally distributed with a mean and a standard deviation of 21 minutes and 10 minutes, respectively. [You may find it useful to reference the z table.] a. Find the probability that a randomly picked assembly takes between 13 and 22 minutes. (Round " value to 2 decimal places and final answer to 4 decimal places. Probability b. It is unusual for the assembly time to be above 35 minutes or below...

• ### Suppose x is normally distributed with a mean of 130 and a standard deviation of 25

Suppose x is normally distributed with a mean of 130 and a standard deviation of 25. Twenty-six percent of the values are less than what value? 123.5 114 136 146

Need Online Homework Help?