1. Questions

statistic

A survey of drivers in the United States found that 15% never use a cell phone while driving. Suppose that drivers arrive at random at an auto inspection station.
a. If the inspector checks 10 drivers, what is the probability that at least one driver never uses a cell phone while driving?
b. Suppose the inspector checks 1000 drivers. Use the normal approximation to the binomial distribution to find the approximate probability that at least 13% of these drivers never use a cell phone while driving.
c. If the drivers are inspected sequentially as they arrive randomly at the inspection station, what is the probability that the first driver who uses a cell phone while driving is the third driver checked?
d. What is the expected number of drivers who must be checked to find the first who never uses a cell phone while driving?
e. What is the expected number of drivers who must be checked to find the first driver who uses a cell phone while driving?
f. If it costs $5 to question each driver, what is the expected cost and standard deviation of questioning up to and including the first driver who uses a cell phone while driving?
g. Will the cost of inspection in part f often exceed $15? Explain.

  1. 👍
  2. 👎
  3. 👁
sasha

  1. I'm not sure..

    1. 👍
    2. 👎
    Riley

Respond to this Question

First Name

Your Response

Similar Questions

  1. social studies

    In which of the following industries are the majority of jobs in the United States and Canada found? 1. A. service------- B. education C. healthcare D. tourism 2. Which role does the government play in the economies of the United

  2. math

    By your cell phone contract, you pay a monthly fee plus some money for each minute you use the phone during the month. In one month, you spent 200 minutes on the phone, and paid $22.45. In another month, you spent 350 minutes on

  3. history

    why was the Open Door Policy important to the United States? a. it gave the United States territory in China b. it gave the United States access to millions of consumers in China c. it increased Chinese investments in the United

  4. Statistics

    Q1:(a) Make a relative frequency table of the data. Enter your answers to three decimal places. Cell Phone Owned Relative Frequency Android smartphone iPhone smartphone Blackberry smartphone Cell phone not smartphone No cell phone

  1. History

    Which of the following statements best summarizes Washington’s viewpoint on American foreign policy? (1 point) The United States can take advantage of Europe’s ambition. The United States should limit interaction with Europe

  2. Social studies

    How do spanish south Americans goverbment compare with that of the united states? A.they have presidental systems, unlike the united states. B. They are mosly democracies like the united states.***** c.they have parliamentary

  3. social studies

    which of the following arguments could have been used to support the us acquisition of Puerto Rico Guam and the Philippines? 1)The united states needed naval bases in the Caribbean and the pacific and new territory for businesses

  4. History

    What role did the United States play in the Indochina War? A.The United States provided supplies and military observers to France. B.The United States sent financial aid to the Democratic Republic of Vietnam’s independence

  1. History

    "Americans had decided how to rule their new territories. When the war with Spain began, the United States pledged to "leave the government and control of cuba to its people." In what way did the United States fail to keep the

  2. Math

    a survey at your school found that 792 in 1,220 students have a cell phone. what percent of the students in have a cell phone? round to the nearest hundredth where necessary 6.49% 54.04% 64.92% 79.20%****

  3. Math

    Which of the following is the best alternative plan to purchasing cell phone insurance? Group of answer choices Buy 2 of the same phone so that you have a backup phone in case the original breaks or needs replacement. Trust that

  4. Social Studies

    1. In which of the following industries are the majority of jobs in the United States and Canada found? A. Service B. Education** C. Healthcare D. Tourism 2. Which role does the government play in the economies of the United

You can view more similar questions or ask a new question.