question 1

Data from Ivy Tech's advising center shows the wait times as a normal distribution with the average as 20 min and a standard deviation as 5 min.

Using the empirical rule, what percent of students wait between 15 and 25 minutes?

What percent wait more than 20 min?

Question 6

This is used for the next few questions: The rating for the new scary movie has a scale of 0 to 10. The average response was that the regular movie attendant enjoyed the movie with 8.3 points and a standard deviation of 0.5 points.

What is the percent of people who gave the movie a rating between 6.8 and 8.8?

(Write the number as a percent only without a percent sign.)

Question 7

This is used for the next few questions: The rating for the new scary movie has a scale of 0 to 10. The average response was that the regular movie attendant enjoyed the movie with 8.3 points and a standard deviation of 0.5 points.

What percent of people gave the movie a 9.8 or better?

(Write answer as a percentage without a percent sign.)

Using the empirical rule, what is the chance that someone waits less than 5 min?

Question 1

A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what percentage of students spend less than 12 hours in class?

Question 2

If an hourglass takes an average of 1 hour to empty a full cycle, what probability of time does it take longer than 72 minutes if the standard deviation is 5 minutes?(Make sure to use a percentage!)

Question 3

On average, the printer uses 500 sheets of paper each day with a standard deviation of 10 sheets. What is the probability that the printer uses more than 508 sheets of paper?

Question 5

A homeowner stays in a single location for an average of 20 years with a standard deviation of 5.7 years. What are the chances (percentage) that someone lives in their home for 40 years or more?

Question 6

Employees at Executive Management Co. spend an average of 80 minutes on the phone each day. If the standard deviation is 8 minutes, what percentage of people spend less than 1 hour on the phone?

Question 7

The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances that someone is earning more than $20 an hour?

Question 8

Red pens comes with a certain amount of dye #2 from the factory. The average pen needs approximately 1 gram of dye with a standard deviation of 0.083 g. What is the percentage that a pen has dye #2 above 1.1 g?

Question 10

The Alpha company takes a survey of the age for all employees. The average age is 35 with a standard deviation of 3.2 years. The results for a normal distribution curve. If the company has 985 workers, how many are over 44 years old?