Statistics

1) A Motor Company has purchased steel parts from a supplier for several years and has found that 10% of the parts must be returned because they are defective. An order of 25 parts is received. What are the mean and standard deviation of the defective parts?
A) Mean = 3.5; standard deviation = 2.5
B) Mean = 2.5; standard deviation = 1.5
C) Mean = 1.5; standard deviation = 2.5
D) Mean = 2.5; standard deviation = 3.5

2)Given a binomial random variable with n = 15 and = 0.4, find the following probability using the binomial table. P (6 < x < 10)

A) 0.0338
B) 0.1181
C) 0.0947
D) 0.3564

  1. 👍
  2. 👎
  3. 👁
  1. For 1).
    Your values are the following:
    p = .1, q = 1 - p = .9, and n = 25

    To find mean and standard deviation:
    mean = np = (25)(.1) = ?
    standard deviation = √npq = √(25)(.1)(.9)= ?

    I'll let you finish the calculations to answer the question.

    For 2).
    Use the binomial table to determine your answer for the values given.

    I hope this will help get you started.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Advanced Functions

    he value of a new car depreciates at a rate of 12% per year. Write an equation to represent the approximate value of a car purchased for $23 000. Determine the value of the car two years after it is purchased. Approximately how

  2. sceince

    What is the best explanation for the changes in population and steel consumption during the last 50 years on the graph? (1 point) Past construction of things like hydroelectric dams has continued to meet needs without requiring

  3. Statistics

    Use Bayes' theorem to solve this problem. A storeowner purchases stereos from two companies. From Company A, 550 stereos are purchased and 1% are found to be defective. From Company B, 850 stereos are purchased and 6% are found to

  4. statistics

    A manufacturer has a maximum of 240, 360, and 180 kilograms of wood, plastic and steel available. The company produces two products, A and B. Each unit of A requires 1, 3 and 2 kilograms of wood, plastic and steel respectively;

  1. Statistics

    A purchasing agent for a trucking company is shopping for replacement tires for their trucks from two suppliers. The suppliers' prices are the same. However, Supplier A's tires have an average life of 60,000 miles with a standard

  2. statistics

    A manufacturing company produces 10,000 plastic glasses per week. This company supplies plastic glasses to another company, which packages the glasses as part of picnic sets. The second company randomly samples 10 glasses from the

  3. physics

    Two rockets with the same mass are accelerated. Rocket A accelerates twice as quickly as rocket B. Which statement is correct?(1 point) The motor in rocket A is half as powerful as the motor in rocket B. The motor in rocket A is

  4. accounting

    Jan. 1 Purchased a small company and recorded goodwill of $150,000. Its useful life is indefinite. May 1 Purchased for $90,000 a patent with an estimated useful life of 5 years and a legal life of 20 years

  1. statistics

    Use Bayes' theorem to solve this problem. A storeowner purchases stereos from two companies. From Company A, 250 stereos are purchased and 1% are found to be defective. From Company B, 950 stereos are purchased and 10% are found

  2. Managerial accounting

    Han Products manufactures 30,000 units of part S-6 each year for use on its production line. At this level of activity, the cost per unit for part S-6 is as follows: Direct materials $ 3.60 Direct labor 10.00 Variable

  3. Math

    A charter fishing company buys a new boat for $224,000 and assumes that it will have a trade-in value of $115,200 after 16 years. Find a linear model for the depreciated value V of the boat t years after it was purchased.

  4. finance

    Your company is considering a replacement of an old delivery van with a new one that is more efficient. The old van cost $30,000 when it was purchased 5 years ago. The old van is being depreciated using the simplified straight

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