Author Question: On the average, 6.7 cars arrive at the drive-up window of a bank every hour. Define the random ... (Read 69 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?

Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

For a complete list of videos, visit our video library