/*! 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} Q4 Symbols Identify the symbols use... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 3: Q4 (page 107)

Symbols Identify the symbols used for each of the following: (a) sample standard deviation;(b) population standard deviation;(c) sample variance;(d) population variance.

Short Answer

Expert verified

The following symbols are used:

(a) Sample standard deviation:s

(b) Population standard deviation:蟽

(c) Sample variance:s2

(d) Population variance:蟽2

Step by step solution

01

Parameter and statistics

The various mathematical measures computed for the population are called theparameters, and those computed for the sample are called thestatistics.

The mean and variance of a population are categorized as parameters.

The mean and variance of a sample are categorized as statistics.

02

Symbols for parameter and statistics

Different symbols are used to denote parameters and statistics. Some of the commonly used symbols are as follows:

(a)

The notation s is used for the standard deviation of the sample.

(b)

The notation蟽is used for the standard deviation of the population.

(c)

The notations2is used for the sample variance.

(d)

The notation蟽2is used for the population variance.

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

In Exercises 5鈥�20, find the range, variance, and standard deviation for the given sample data. Include appropriate units (such as 鈥渕inutes鈥�) in your results. (The same data were used in Section 3-1, where we found measures of center. Here we find measures of variation.) Then answer the given questions.

Diamond Ring Listed below are the amounts (dollars) it costs for marriage proposal packages at the different Major League Baseball stadiums. Five of the teams don鈥檛 allow proposals. Are there any outliers, and are they likely to have much of an effect on the measures of variation?

39 50 505055 55 75 85 100 115 175 175 200 209 250 250 350 400 450 500 500 500 500 1500 2500

In Exercises 29鈥�32, find the mean of the data summarized in the frequency distribution. Also, compare the computed means to the actual means obtained by using the original list of data values, which are as follows: (Exercise 29) 36.2 years; (Exercise 30) 44.1 years; (Exercise 31) 224.3; (Exercise 32) 255.1..

Blood Platelet Count of Males (1000 cells / )

Frequency(f)

0-99

1

100-199

51

200-299

90

300-399

10

400-499

0

500-599

0

600-699

1

In Exercises 33鈥�36, use the range rule of thumb to identify the limits separating values that are significantly low or significantly high

Body Temperatures Based on Data Set 3 鈥淏ody Temperatures鈥� in Appendix B, body temperatures of adults have a mean of 98.20掳F and a standard deviation of 0.62掳F. (The data from 12 AM on day 2 are used.) Is an adult body temperature of 100oF significantly low or significantly high?

In Exercises 21鈥�24, find the mean and median for each of the two samples, then compare the two sets of results.

Parking Meter Theft Listed below are amounts (in millions of dollars) collected from parking meters by Brinks and others in New York City during similar time periods. A larger data set was used to convict five Brinks employees of grand larceny. The data were provided by the attorney for New York City, and they are listed on the Data and Story Library (DASL) website. Do the limited data listed here show evidence of stealing by Brinks employees?

Collection Contractor Was Brinks 1.3 1.5 1.3 1.5 1.4 1.7 1.8 1.7 1.7 1.6

Collection Contractor Was Not Brinks 2.2 1.9 1.5 1.6 1.5 1.7 1.9 1.6 1.6 1.8

In Exercises 5鈥�8, express all z scores with two decimal places.

PHL Data Speeds Repeat the preceding exercise using the Verizon data speed of 0.8 Mbps at Philadelphia International Airport (PHL).
See all solutions

Recommended explanations on Math Textbooks

Probability and Statistics

Read Explanation

Calculus

Read Explanation

Theoretical and Mathematical Physics

Read Explanation

Statistics

Read Explanation

Logic and Functions

Read Explanation

Geometry

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.