Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 6: Q.1 (page 409)

What is the probability that a randomly chosen subject completes at least 3puzzles in the five-minute period while listening to soothing music?

(a) 0.3 (c) 0.6 (e) Cannot be determined

(b) 0.4 (d) 0.9

Short Answer

Expert verified

P(X≥3)=0.4

Step by step solution

01

Given information

Given in the question that, We need to find the probability that a randomly chosen subject completes at least 3puzzles in the five-minute period while listening to soothing music .

02

Explanation

In the given question the probability of solving at least three puzzles can be rewritten as:P(X≥3)

localid="1650045723902" P(X≥3)=P(X=3)+P(X=4)=0.3+0.1=0.4

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.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

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

A large auto dealership keeps track of sales and leases agreements made during each hour of the day. Let χ= the number of cars sold and γ= the number of cars leased during the first hour of business on a randomly selected Friday. Based on previous records, the probability distributions of χand γare as follows:

DefineD=X-Y

Find and interpret μD.

53. The Tri - State Pick 3Refer to Exercise 42. Suppose you buy a $1 ticket on each of two different days.
(a) Find the mean and standard deviation of the total payoff. Show your work.
(b) Find the mean and standard deviation of your total winnings. Interpret each of these values in context.

79. Sowing seeds Refer to Exercise 69.

(a) Find the probability that exactly17 seeds germinate. Show your work.
(b) If only 12seeds actually germinate, should Judy be suspicious that the company’s claim is not true? Compute P(X≤12)and use this result to support your answer.

Lie detectors A federal report finds that lie detector tests given to truthful persons have probability about 0.2 of suggesting that the person is deceptive. A company asks 12job applicants about thefts from
previous employers, using a lie detector to assess their truthfulness. Suppose that all 12 answer truthfully. Let X=the number of people who the lie detector says are being deceptive.
(a) Find and interpret μX.
(b) Find and interpret σX.

90. Normal approximation To use a Normal distribution to approximate binomial probabilities, why do we require that both np and n(1−p) be at least 10?

See all solutions

Recommended explanations on Math Textbooks

Geometry

Read Explanation

Applied Mathematics

Read Explanation

Pure Maths

Read Explanation

Probability and Statistics

Read Explanation

Discrete 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.

Sign-up for free