A manufacturing machine has a 5% defect rate.

If 8 items are chosen at random, what is the probability that at least one will have a defect?

If 8 items are chosen at random, what is the probability that at least one will have a defect?

remolatg
2021-09-01
Answered

A manufacturing machine has a 5% defect rate.

If 8 items are chosen at random, what is the probability that at least one will have a defect?

If 8 items are chosen at random, what is the probability that at least one will have a defect?

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izboknil3

Answered 2021-09-02
Author has **99** answers

Explanation

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The p-value.

Given: The size of the sample (n) is 15.

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In a recent poll, 45% of survey respondents said that, if they only had one child, they would prefer the child to be a boy. Suppose you conducted a survey of 160 randomly selected students on your campus and find that 79 of them would prefer a boy. Complete parts (a) and (b) below.

Click here to view the standard normal distribution table (page 1).

LOADING...

Click here to view the standard normal distribution table (page 2).

LOADING...

(a) Use the normal approximation to the binomial to approximate the probability that, in a random sample of 160 students, at least 79 would prefer a boy, assuming the true percentage is 45%.

The probability that at least 79 students would prefer a boy is 3636.

(Round to four decimal places as needed.)

Click here to view the standard normal distribution table (page 1).

LOADING...

Click here to view the standard normal distribution table (page 2).

LOADING...

(a) Use the normal approximation to the binomial to approximate the probability that, in a random sample of 160 students, at least 79 would prefer a boy, assuming the true percentage is 45%.

The probability that at least 79 students would prefer a boy is 3636.

(Round to four decimal places as needed.)

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An oil company conducts a geologival survey that indicates an exploratory oil well should have a 23% change of striking oil.

A. What is the probability that the 2nd strike will occur on the 5th attempt?

B. What is the probability that the 7th strike will occur on the 12th attempt?

C. What is the probability that the 11th strike will occur between the 15th and 18th attempt?

A. What is the probability that the 2nd strike will occur on the 5th attempt?

B. What is the probability that the 7th strike will occur on the 12th attempt?

C. What is the probability that the 11th strike will occur between the 15th and 18th attempt?

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