/*! 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 45. Feeling sleepy? Students in a hi... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 1: Q 45. (page 47)

Feeling sleepy? Students in a high school statistics class responded to a survey designed by their teacher. One of the survey questions was 鈥淗ow much sleep did you get last night?鈥� Here are the data (in hours):

Part (a). Make a dotplot to display the data.

Part (b). Experts recommend that high school students sleep at least 9 hours per night. What proportion of students in this class got the recommended amount of sleep?

Short Answer

Expert verified

Part (a)

Part (b) 0.1785

Step by step solution

01

Part (a) Step 1. Given information.

A survey designed by their teacher was completed by students in a high school statistics class.

02

Part (a) Step 2. Create a number line.

Put a dot above the corresponding number on the number line for each given data value.

03

Part (b) Step 1. This class's students got the recommended amount of sleep.

We can see in the dotplot that there are three dots at nine, one at ten, and one at eleven, for a total of five dots that correspond to at least nine hours of sleep per night.

Furthermore, we note that there are 28 dots in total in the dotplot, implying that 5 of the 28 students in the study slept at least 9 hours per night.

528鈮�0.1785

Thus, 0.1785 of the students in the study slept for at least 9 hours per night.

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

Pulse rates Refer to Exercise 88.

(a) Find the range of the pulse rates for all 19 students and the range of the pulse rates excluding the student with the medical issue.

(b) Explain what part (a) suggests about using the range as a measure of variability for a distribution of quantitative data.

You look at real estate ads for houses in Naples, Florida. There are many houses ranging from \(200,000 to \)500,000 in price. The few houses on the water, however, are priced up to $15 million. The distribution of house prices will be

a. skewed to the left.

b. roughly symmetric.

c. skewed to the right.

d. single-peaked.

e. too high.

ShakespeareThe histogram shows the distribution of lengths of words used in Shakespeare鈥檚 plays.

(a) Find the median word length in Shakespeare鈥檚 plays from the histogram. Explain your method clearly.

(b) Calculate the mean of the distribution. Show your work.

Ranking colleges Popular magazines rank colleges and universities on their 鈥渁cademic quality鈥� in serving undergraduate students. Describe two categorical variables and two quantitative variables that you might record for each institution.

Multiple Choice Select the best answer.

Exercises 9 and 10 refer to the following setting. At the Census Bureau website www.census.gov, you can view detailed data collected by the American Community Survey.

The following table includes data for 10 people chosen at random from the more than 1 million people in households contacted by the survey. 鈥淪chool鈥� gives the highest level of education completed.

The individuals in this data set are

(a) households.

(b) people.

(c) adults.

(d) 120 variables.

(e) columns
See all solutions

Recommended explanations on Math Textbooks

Discrete Mathematics

Read Explanation

Applied Mathematics

Read Explanation

Logic and Functions

Read Explanation

Calculus

Read Explanation

Pure Maths

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.