/*! 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. AP1.3 A large set of test scores has m... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 4: Q. AP1.3 (page 293)

A large set of test scores has mean 60and standard deviation 18. If each score is doubled, and then 5is subtracted from the result, the mean and standard deviation of the new scores are

a. mean 115and standard deviation 31.

b. mean 115and standard deviation 36.

c. mean 120and standard deviation 6.

d. mean 120and standard deviation 31.

e. mean 120and standard deviation 36.

Short Answer

Expert verified

The standard deviation of the new scores are (b) mean115and standard deviation36.

Step by step solution

01

Given Information

We have been given that the mean (渭) = 60and standard deviation (蟽) =18. All scores are then doubled and decreased by 5.

02

Simplification

Since the mean is a measure of a center, it is influenced in the same way that the scores are, so the mean is doubled and reduced by 5.

渭new=2渭-5

渭new=2脳60-5

渭new=115.

Since the standard deviation is also the measure of spread, the standard deviation is also doubled but not decreased by 5.

localid="1653802755720" 蟽new=2蟽=2脳18=36

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

Your statistics class has 30students. You want to ask an SRS of 5students from your class whether they use a mobile device for the online quizzes. You label the students 01,02,...,30. You enter the table of random digits at this line: 1445926056314248037165103622532249061181

Your SRS contains the students labeled

a. 14,45,92,60,56

b. 14,31,03,10,22

c. 14,03,10,22,22

d.14,03,10,22,06

e.14,03,10,22,11

Cocoa and blood flow A study of blood flow involved 27healthy people aged 18to 72. Each subject consumed a cocoa beverage containing 900milligrams of flavonols daily for 5days. Using a finger cuff, blood flow was measured on the first and fifth days of the study. After 5 days, researchers measured what they called 鈥渟ignificant improvement鈥� in blood flow and the function of the cells that line the blood vessels. What flaw in the design of this experiment makes it impossible to say if the cocoa really caused the improved blood flow? Explain your answer.

Eating on campus The director of student life at a small college wants to know what

percent of students eat regularly in the cafeteria. To find out, the director selects an SRS of

300 students who live in the dorms. Describe how undercoverage might lead to bias in this

study. Explain the likely direction of the bias.

A farmer is experimenting to determine which variety of apple trees, Fuji or Gala, will produce more fruit in his orchard. The orchard is divided into 20equally sized square plots. He has 10trees of each variety and randomly assigns each tree to a separate plot in the orchard. What is the experimental unit (s) in this study? a. The trees; b. The farmer; c. The plots d. The orchard e. The apples

Rude surgeons, Is a friendly surgeon a better surgeon? In a study of more than 32,000

surgical patients from 7 different medical centers, researchers classified surgeons by the number of unsolicited complaints that had been recorded about their behavior. The researchers found that surgical complications were significantly more common in patients whose surgeons had received the most complaints, compared with patients whose surgeons had received the fewest complaints. What conclusion can we draw from this study? Explain your reasoning.
See all solutions

Recommended explanations on Math Textbooks

Probability and Statistics

Read Explanation

Geometry

Read Explanation

Mechanics Maths

Read Explanation

Decision Maths

Read Explanation

Applied Mathematics

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.