Author Question: On the average, 6.7 cars arrive at the drive-up window of a bank every hour. Define the random ... (Read 98 times)

waynest

  • Hero Member
  • *****
  • Posts: 553
On the average, 6.7 cars arrive at the drive-up window of a bank every hour. Define the random variable x to be the number of cars arriving in any hour.
 a. What is the appropriate probability distribution for x? Explain how x satisfies the properties of the distribution.
  b. Compute the probability that exactly 5 cars will arrive in the next hour.
  c. Compute the probability that no more than 5 cars will arrive in the next hour.

Question 2

The 95 confidence interval estimate of a population variance when a sample variance of 324 is obtained from a sample of 81 items is
 a. 14.14 to 174.94.
  b. 243.086 to 453.520.
  c. 16.42 to 194.35.
  d. 254.419 to 429.203.



af

  • Sr. Member
  • ****
  • Posts: 356
Answer to Question 1

a. Poisson; it shows the probability of x occurrences of the event over a time period.

b. 0.1385
c. 0.3406

Answer to Question 2

b



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

For a complete list of videos, visit our video library