A manufacturer of window frames knows from past experience that 10 per cent of the production will have some type of minor defect that will require adjustment. Suppose 20 window frames are selected at random: a. How many window frames would you expect to have minor defects? b. Calculate the standard deviation for the number of window frames to have minor defects in this random sample of 20 window frames. c. Calculate the probability that exactly 2 window frames will need minor adjustment

A manufacturer of window frames knows from past experience that 10 per cent of the production will have some type of minor defect that will require adjustment. Suppose 20 window frames are selected at random: a. How many window frames would you expect to have minor defects? b. Calculate the standard deviation for the number of window frames to have minor defects in this random sample of 20 window frames. c. Calculate the probability that exactly 2 window frames will need minor adjustment

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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Question

A manufacturer of window frames knows from past experience that 10 per cent of the
production will have some type of minor defect that will require adjustment. Suppose 20
window frames are selected at random:
a. How many window frames would you expect to have minor defects?
b. Calculate the standard deviation for the number of window frames to have minor
defects in this random sample of 20 window frames.
c. Calculate the probability that exactly 2 window frames will need minor
adjustment.
d. What is the probability that more than 3 window frames will need minor
adjustments?

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