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Chapter 8: Q 38. (page 522)

More cheating Refer to Exercise 36. Calculate and interpret the standard error of p^for these data.

Short Answer

Expert verified

The value of standard error is0.0239.

Step by step solution

01

Given Information

It is given that:

n=172

x=19

02

Concept Used

Formula to be used isSEp^=p^(1-p^)n

03

Calculation of Standard Error

Calculation of sample proportion is

p^=xn

=19172

0.1105

Hence, standard error

SEp^=p^(1-p^)n

role="math" localid="1654280036152" SEp^=0.1105(1-0.1105)172

SEp^=0.0239

Standard of error is0.0239.

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Most popular questions from this chapter

Selling online According to a recent Pew Research Center report, many

American adults have made money by selling something online. In a random sample of 4579American adults, 914reported that they earned money by selling something online in the previous year. Assume the conditions for inference are met.

Determine the critical value z* for a 98% confidence interval for a proportion.

b. Construct a 98% confidence interval for the proportion of all American adults who

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c. Interpret the interval from part (b).

Prayer in school Refer to Exercise 5.

a. Explain what would happen to the length of the interval if the confidence level were increased to 99%.

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c. The news article goes on to say: 鈥淭he theoretical errors do not take into account

additional errors resulting from the various practical difficulties in taking any survey of public opinion.鈥� List some of the 鈥減ractical difficulties鈥� that may cause errors which are not included in the 卤3 percentage point margin of error.

Check whether each of the conditions is met for calculating a confidence interval for the population proportion

Salty chips A quality control inspector takes a random sample of 25 bags of potato chips from the thousands of bags filled in an hour. Of the bags selected, 3 had too much salt.

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III. Some people never answered the phone in several calls.

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a. Why is it necessary to check this condition?

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