« previous next »

Author Question: On the average, 6.7 cars arrive at the drive-up window of a bank every hour. Define the random ... (Read 108 times)

waynest

  • Hero Member
  • *****
  • Posts: 553
on: Jun 24, 2018
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
Reply #1 on: Jun 24, 2018
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
« previous next »
 

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Average Chemical Composition of the Geosphere Crust Average Chemical Composition of the Geosphere Crust
Examples of Impacts Associated with Different Amounts of Global Average Temperat Examples of Impacts Associated with Different Amounts of Global Average Temperat
Average Pulse Rates by Age Average Pulse Rates by Age
Pressure Zones Drive Winds Pressure Zones Drive Winds
How to find the average value of a function (Part 2) How to find the average value of a function (Part 2)
Average Years of Schooling versus GDP per Capita Average Years of Schooling versus GDP per Capita
Video: Stretch reflex & Tendon reflex

For a complete list of videos, visit our video library