Problem#5 17. Credit Cards According to a USA Today "Snapshot," 26% NW of adults do not have any credit cards. A simple random sample of 500 adults is obtained. (a) Describe the sampling distribution of p, the sample pro- portion of adults who do not have a credit card. (b) In a random sample of 500 adults, what is the probability that less than 24% have no credit cards? (c) Would it be unusual if a random sample of 500 adults results in 150 having no credit cards? Answers: (a) 0.26, 0.020 (b) 15.40% (c) 2.074

Problem#5 17. Credit Cards According to a USA Today "Snapshot," 26% NW of adults do not have any credit cards. A simple random sample of 500 adults is obtained. (a) Describe the sampling distribution of p, the sample pro- portion of adults who do not have a credit card. (b) In a random sample of 500 adults, what is the probability that less than 24% have no credit cards? (c) Would it be unusual if a random sample of 500 adults results in 150 having no credit cards? Answers: (a) 0.26, 0.020 (b) 15.40% (c) 2.074

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Problem#5
17. Credit Cards According to a USA Today "Snapshot," 26%
NW of adults do not have any credit cards. A simple random sample
of 500 adults is obtained.
(a) Describe the sampling distribution of p, the sample pro-
portion of adults who do not have a credit card.
(b) In a random sample of 500 adults, what is the probability
that less than 24% have no credit cards?
(c) Would it be unusual if a random sample of 500 adults
results in 150 having no credit cards?
Answers: (a) 0.26, 0.020 (b) 15.40% (c) 2.07%

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