This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The average waiting time at the checkout counter for a large grocery chain is 2.45 minutes with a ... (Read 165 times)

RYAN BANYAN

  • Hero Member
  • *****
  • Posts: 563
on: Jun 24, 2018
The average waiting time at the checkout counter for a large grocery chain is 2.45 minutes with a standard deviation of 24 seconds (0.40 minutes). Assume that the distribution of waiting time is normal. What proportion of the customers are served in between 1 minute and 2.5 minutes?

Question 2

The average SAT score for the 300 students accepted at Tiny College this year is 1050 with a standard deviation of 275 . If a random sample of 40 students is selected from this class, what is the probability that the average SAT score will be between 1060 and 1120?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

frejo

  • Sr. Member
  • ****
  • Posts: 349
Reply #1 on: Jun 24, 2018
Answer to Question 1

0.5517

Answer to Question 2

0.3595


RYAN BANYAN

  • Member
  • Posts: 563
Reply 2 on: Jun 24, 2018
Gracias!

milbourne11

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

Aerial and close-up views of a large biodiversity experiment in Cedar Creek, Minnesota. Each of the Aerial and close-up views of a large biodiversity experiment in Cedar Creek, Minnesota. Each of the
DNA replication is the basis for the perpetuation of life through time DNA replication is the basis for the perpetuation of life through time
Large Yellow Wood Sorrel Large Yellow Wood Sorrel
Students rated their grandparents on a scale from 1 to 4 based on emotional closeness, time spent ... Students rated their grandparents on a scale from 1 to 4 based on emotional closeness, time spent ...
Three-dimensional models of the small and large subunits of ribosomes. Three-dimensional models of the small and large subunits of ribosomes.
Time-of-entry mapping Time-of-entry mapping
Video: PET Scan Animation

For a complete list of videos, visit our video library