/*! 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.38 Identify the following:a. x=____... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 8: Q.38 (page 479)

Identify the following:

a. x=_______

b. sx =_______

c. n =_______

d. n 鈥� 1 =_______

Short Answer

Expert verified

Identify the following:

  1. Thesample mean waiting time was1.5hours, that is,x炉=1.5
  2. The sample standard deviation is 0.5
  3. The total number n= 70
  4. n-1=69

Step by step solution

01

Part (a) Step 1: Given Information 

Given that the sample mean was 1.5 hours with a sample standard deviation of 0.5 hoursand sample size 70

02

Part (a) Step 2: Explanation

The sample mean is the average (or mean) value of a group of numbers drawn from a larger population of numbers, where "population" refers to all relevant data, whether or not it has been gathered.

Here, the sample means waiting time was 1.5 hours.

03

Part (b) Step 1: Given Information

Given that the sample mean was 1.5 hours with a sample standard deviation of 0.5 hoursand sample size 70

04

Part (b) Step 2: Explanation of (b)

The standard deviation is a measurement of a set of values' variation or dispersion.

According to the information, the sample standard deviation of the waiting time is 0.5 hours .

05

Part (c) Step 1: Given Information

Given that the sample mean was 1.5 hours with a sample standard deviation of 0.5 hoursand sample size 70

06

Part (c) Step 2: Explanation

The number of subjects included in a sample size is referred to as the sample size in market research. Here, the total number of patients surveyed by the investigation committee is 70.

07

Part (d) Step 1: Given Information 

Given that the sample mean was 1.5 hours with a sample standard deviation of 0.5 hoursand sample size 70

08

Part (d) Step 2: Explanation

If the total [patient surveyed is 70 thenn-1=69If the total patients surveyed is70, then the value ofn-1is69, that is,n-1=69

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

List two difficulties the company might have in obtaining random results, if this survey were done by email.

Suppose that 14children, who were learning to ride two-wheel bikes, were surveyed to determine how long they had

to use training wheels. It was revealed that they used them an average of six months with a sample standard deviation of

three months. Assume that the underlying population distribution is normal.

a.i.x虅=__________ii.sx=__________iii.n=__________iv.n鈥�1=__________

b. Define the random variable Xin words.

c. Define the random variable Xin words.

d. Which distribution should you use for this problem? Explain your choice.

e. Construct a 99%confidence interval for the population mean length of time using training wheels.

i. State the confidence interval.

ii. Sketch the graph.

iii. Calculate the error bound.

f. Why would the error bound change if the confidence level were lowered to 90%?

The data in Table 8.10 are the result of a random survey of 39 national flags (with replacement between picks) from various countries. We are interested in finding a confidence interval for the true mean number of colors on a national flag. Let X = the number of colors on a national flag.

Construct a 95% confidence interval for the true mean number of colors on national flags.

Using the same x炉 , sx , and n = 39, how would the error bound change if the confidence level were reduced to 90%? Why?

Using the same mean, standard deviation, and sample size, how would the error bound change if the confidence level were reduced to 90%? Why?

A poll of 1,200 voters asked what the most significant issue was in the upcoming election. Sixty-five percent answered the economy. We are interested in the population proportion of voters who feel the economy is the most important.

Construct a 90% confidence interval, and state the confidence interval and the error bound.
See all solutions

Recommended explanations on Math Textbooks

Discrete Mathematics

Read Explanation

Geometry

Read Explanation

Applied Mathematics

Read Explanation

Calculus

Read Explanation

Logic and Functions

Read Explanation

Probability and Statistics

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.