According to a survey, only 35% of customers whovisited the web site of a major retail store made apurchase. Random samples of size 50 are selected.What is the probability that the sample proportion willhave between 20% and 30% of customers who willmake a purchase after visiting the web site?O a. None of the aboveO b. 0.0132Oc. 0.2296Od. 0.2164

Given that n =50,p=0.35 P ( 0.20<p^ <0.30 ) =?

Answered: According to a survey, only 35% of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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a.) The probability that the sample mean weight of this sample of 20 is greater than 9.75 is _____? b.) The probability that the sample mean weight of this sample of 20 is between 9.75 and 9.89 is ____? c.) There is only a 5% chance that the average weight of a sample of these 20 cheese wedges will be below _____ (answer the blanks)
Suppose that the speed at which cars go on the freeway is normally distributed with mean 69 mph and standard deviation 7 miles per hour. Let X be the speed for a randomly selected car. Round all answers to 4 decimal places where possible.a. If one car is randomly chosen, find the probability that it is traveling more than 66 mph. b. If one of the cars is randomly chosen, find the probability that it is traveling between 72 and 76 mph. c. 84% of all cars travel at least how fast on the freeway? mph.
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1 V. A randomly selected sample of 1000 college students was asked whether they had ever used the drug STC sixteen percent (16%) of the 1000 students survived said they had. which one of the following statements about the number (0.16) is correct: A. It is a sample proportion. B. it is a population proportion. C.it is a margin of error. D. it is a randomly chosen number
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Q15. PLESE ONLY ANSWER QUESTION "G, and H"
A poll asked people with and without children under 18 years old if they frequently experienced stress. The results are shown in the accompanying table. Complete parts (a) through (c) below. Frequently Experience Stress Yes No Total With child under 296 234 530 18 уears No child under 196 314 510 18 years Total 492 548 1040 a. Find the probability that a randomly chosen person from this group said "Yes," given that the person has a child under 18 years old. (Type an integer or decimal rounded to four decimal places as needed.) b. Find the probability that a randomly chosen person from this group said "Yes," given that the person does not have a child under 18 years old. (Type an integer or decimal rounded to four decimal places as needed.) c. Find the probability that a randomly chosen person from this group said "Yes" or had a child under 18 years old. (Type an integer or decimal rounded to four decimal places as needed.)
Suppose a sample of O-nings waS obtained and the wall thickness (in inches) of each was recorded. Use a normal probability plot to assess whether the sample data could have a a come from a population that is normally distnbuted. 0.190 0.194 0.199 0.205 E 0. 0.214 0.213 0.233 0.249 0.264 0.276 0.288 0.292 306 0.308 0.311 0.317 Click here to vew the table of cntical values for normal probability_plots] to Click here to view page 1 of the standard normal distribution table Click here to vew page 2 of the standard normal distribution table 2 b ◦ Using the correlation coeficient of the normal probability plot, is it reasonable to conclude that the population is normally distnibuted? Select the correct choice below and fll in the answer boxes within your choice. (Round to three decimal places as needed.) ○ A. Yes. The correlation between the expected z-scores and the observed data, Therefore, it is not reasonable to conclude that the data come from a noral population. exceeds the critical…

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