Author Question: Determine P(-2.45 z 1.69), assuming a standard normal ... (Read 56 times)

jenna1

  • Hero Member
  • *****
  • Posts: 568
Determine P(-2.45  z  1.69), assuming a standard normal distribution.

Question 2

The amount of time spent by American adults playing sports per day is normally distributed with a mean of 4 hours and standard deviation of 1.25 hours. Find the probability that if four American adults are randomly selected, their average number of hours spent playing sports is more than 5 hours per day.



jointhecircus

  • Sr. Member
  • ****
  • Posts: 343
Answer to Question 1

0.9474

Answer to Question 2

0.0548



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

For a complete list of videos, visit our video library