/*! 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. 3.1 Follow the method shown in the e... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 2: Q. 3.1 (page 124)

Follow the method shown in the examples to answer each of the following questions. Use your calculator or the Normal Curve applet to check your answers.

1. Cholesterol levels above 240mg/dlmay require medical attention. What percent of 14-year-old boys have more than 240mg/dlof cholesterol?

Short Answer

Expert verified

The percentage of 14- years old boys have more than 240mg/dlis 1%

Step by step solution

01

Given Information 

Cholesterol levels may require medical attention =240mg/dlabove

Age of boys =14year old

02

Explanation 

Cholesterol levels above 240mg/dlmay require medical attention.

Find and interpretP(X>240).

P(X>240)=normalcdf(lower:240,upper:9999,渭=170,蟽=30)P(X>240)=0.0098

03

Final Answer

There's about a 1%chance that a randomly selected 14-year old boy will have a cholesterol level above 240mg/dl.

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

Tall or short? Refer to Exercise 19. Mr. Walker converts his students鈥� original heights from inches to feet.

(a) Find the mean and median of the students鈥� heights in feet. Show your work.

(b) Find the standard deviation and IQR of the students鈥� heights in feet. Show your work.

Questions T2.9 and T2.10 refer to the following setting. Until the scale was changed in 1995, SAT scores were based on a scale set many years ago. For Math scores, the mean under the old scale in the 1990swas 470and the standard deviation was 110. In 2009, the mean was 515and the standard deviation was 116 .
T2.10. Jane took the SAT in 1994and scored 500. Her sister Colleen took the SAT in 2009and scored 530. Who did better on the exam, and how can you tell?
(a) Colleen-she scored 30 points higher than Jane.
(b) Colleen-her standardized score is higher than Jane's.
(c) Jane-her standardized score is higher than Colleen's.
(d) Jane-the standard deviation was bigger in 2009.
(e) The two sisters did equally well-their z-scores are the same.

Consider the height distribution for 15-year-old males.

(a) Find its mean and standard deviation. Show your method clearly.

(b) What height would correspond to a z-score of2.5? Show your work.

Computer use Mrs. Causey asked her students how much time they had spent using a computer during the previous week. The following figure shows a cumulative relative frequency graph of her students鈥� responses.

(a) At what percentile does a student who used her computer for 10hours last week fall?

(b) Estimate the median, Q1, and Q3from the graph. Are there any outliers

Baseball salaries Brad Lidge played a crucial role as the Phillies鈥� 鈥渃loser,鈥� pitching the end of many games throughout the season. Lidge鈥檚 salary for the 2008 season was $6,350,000

(a) Find the percentile corresponding to Lidge鈥檚 salary. Explain what this value means.

(b) Find the z-score corresponding to Lidge鈥檚 salary. Explain what this value means.
See all solutions

Recommended explanations on Math Textbooks

Discrete Mathematics

Read Explanation

Decision Maths

Read Explanation

Pure Maths

Read Explanation

Theoretical and Mathematical Physics

Read Explanation

Calculus

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.