/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q.1.2. About 75%聽of young adult intern... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 7: Q.1.2. (page 437)

About 75%of young adult internet users (ages18-29)watch online video. Suppose that a sample survey contacts an SRS of 1000young adult Internet users and calculates the proportion of p铃�in this sample who watch online video.

Find the standard deviation of the sampling distribution of p铃�.check that the 10%condition is met.

Short Answer

Expert verified

The standard deviation is0.0137

Step by step solution

01

Step-1 Given Information

Given in the question that

population proportion (P)=75%=0.75

Sample size(n)=1000we have to find the standard deviation.

02

Step-2 Explanation

The standard deviation of the sampling distribution p铃�is:

localid="1650022496391" 蟽p=p(1-p)n=0.75(1鈭�0.75)1000=0.0137

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

According to government data, 22%American children under the age of six live in households with incomes less than the official poverty level. A study of learning in early childhood chooses an SRS of 300children. Find the probability that more than 20%of the sample is from poverty households. Be sure to check that you can use the Normal approximation.

Airport security The Transportation Security Administration (TSA) is responsible for airport safety. On some flights, TSA officers randomly select passengers for an extra security check before boarding. One such flight had 76 passengers -12 in first class and 64 in coach class. TSA officers selected an SRS of 10 passengers for screening. Let p^be the proportion of first-class passengers in the sample.

(a) Is the 10%condition met in this case? Justify your answer.

(b) Is the Normal condition met in this case? Justify your answer.

Which one of the following would be a correct interpretation if you have a z-score of +2.0on an exam?

(a) It means that you missed two questions on the exam.
(b) It means that you got twice as many questions correct as the average student.
(c) It means that your grade was two points higher than the mean grade on this exam.
(d) It means that your grade was in the upper 2%of all grades on this exam.
(e) It means that your grade is two standard deviations above the mean for this exam.

Cold cabin? The Fathom screenshot below shows the results of taking 500SRSs of 10temperature readings from a population distribution that鈥檚 N(50,3)and recording the sample minimum each time.

(a) Describe the approximate sampling distribution.

(b) Suppose that the minimum of an actual sample is 40掳F. What would you conclude about the thermostat manufacturer鈥檚 claim? Explain.

How tall? A random sample of female college students has a mean height of 64.5 inches, which is greater than the 63-inch mean height of all adult American women.
See all solutions

Recommended explanations on Math Textbooks

Decision Maths

Read Explanation

Probability and Statistics

Read Explanation

Geometry

Read Explanation

Calculus

Read Explanation

Statistics

Read Explanation

Logic and Functions

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.