/*! 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. 2 Genetics There are many married ... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 5: Q. 2 (page 308)

Genetics There are many married couples in which the husband and wife both carry a gene for cystic fibrosis but don鈥檛 have the disease themselves. Suppose we select one of these couples at random. According to the laws of genetics, the probability that their first child will develop cystic fibrosis is 0.25.

a. Interpret this probability as a long-run relative frequency.

b. If researchers randomly select 4such couples, is one of these couples guaranteed to have a first child who develops cystic fibrosis? Explain your answer.

Short Answer

Expert verified

a) We find that the firstborn kid will get cystic fibrosis in about 25%of them.

b) The sample size must be quite large in order for the probability to be closely reflected in the sample.

Step by step solution

01

Part (a) Step 1: Given information

We have to interpret this probability as a long-run relative frequency.

02

Part (a) Step 2: Explanation

When we look at numerous couples when both the husband and wife have this gene, we find that the firstborn kid will get cystic fibrosis in about 25%of them.

03

Part (b) Step 1: Given information

We have to explain the answer about first child who develops cystic fibrosis.

04

Part (b) Step 2: Explanation

  • If the family has four children, the sample size is four, which is relatively tiny.
  • The sample size must be quite large in order for the probability to be closely reflected in the sample.

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

Free-throw practice At the end of basketball practice, each player on the team must shoot free throws until he makes 10of them. Dwayne is a 70%free-throw shooter. That is, his probability of making any free throw is 0.70. We want to design a simulation to estimate the probability that Dwayne make10 free throws in at most 12shots. Describe how you would use each of the following chance devices to perform one trial of the simulation.

a. Slips of paper

b. Random digits table

c. Random number generator

Matching suits A standard deck of playing cards consists of 52 cards with 13 cards in each of four suits: spades, diamonds, clubs, and hearts. Suppose you shuffle the deck thoroughly and deal 5 cards face-up onto a table.

a. What is the probability of dealing five spades in a row?

b. Find the probability that all 5 cards on the table have the same suit.

Smartphone addiction? A media report claims that 50%of U.S. teens with smartphones feel addicted to their devices. A skeptical researcher believes that this figure is too high. She decides to test the claim by taking a random sample of 100U.S. teens who have smartphones. Only 40of the teens in the sample feel addicted to their devices. Does this result give convincing evidence that the media report鈥檚 50%claim is too high? To find out, we want to perform a simulation to estimate the probability of getting 40or fewer teens who feel addicted to their devices in a random sample of size 100from a very large population of teens with smartphones in which 50% feel addicted to their devices.

Let 1= feels addicted and 2= doesn鈥檛 feel addicted. Use a random number generator to produce 100random integers from 1to 2. Record the number of 1鈥檚 in the simulated random sample. Repeat this process many, many times. Find the percent of trials on which the number of 1鈥檚 was40 or less.

In an effort to find the source of an outbreak of food poisoning at a conference, a team of medical detectives carried out a study. They examined all 50 people who had food poisoning and a random sample of 200 people attending the conference who didn鈥檛 get food poisoning. The detectives found that 40% of the people with food poisoning went to a cocktail party on the second night of the conference, while only 10% of the people in the random sample attended the same party. Which of the following statements is appropriate for describing the 40% of people who went to the party? (Let F = got food poisoning and A = attended party.)

a. P(F|A) = 0.40

b. P(A|FC) = 0.40

c. P(F|AC) = 0.40

d. P(AC|F) = 0.40

e. P(A|F) = 0.40

Crawl before you walk (At what age do babies learn to crawl? Does it take

longer to learn in the winter, when babies are often bundled in clothes that restrict their

movement? Perhaps there might even be an association between babies鈥� crawling age and

the average temperature during the month they first try to crawl (around 6months after

birth). Data were collected from parents who brought their babies to the University of

Denver Infant Study Center to participate in one of a number of studies. Parents reported

the birth month and the age at which their child was first able to creep or crawl a distance

of 4feet within one minute. Information was obtained on 414infants208boysand206girls. Crawling age is given in weeks, and average temperature (in degrees Fahrenheit) is

given for the month that is 6months after the birth month.

a. Make an appropriate graph to display the relationship between average temperature and

average crawling age. Describe what you see.

Some computer output from a least-squares regression analysis of the data is shown.

b. What is the equation of the least-squares regression line that describes the relationship

between average temperature and average crawling age? Define any variables that you

use.

c. Interpret the slope of the regression line.

d. Can we conclude that warmer temperatures 6months after babies are born causes them

to crawl sooner? Justify your answer.
See all solutions

Recommended explanations on Math Textbooks

Probability and Statistics

Read Explanation

Statistics

Read Explanation

Logic and Functions

Read Explanation

Calculus

Read Explanation

Discrete Mathematics

Read Explanation

Theoretical and Mathematical Physics

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.