A market research firm conducts telephone surveys with a 38% historical response rate. What is the probability that in a new sample of 400 telephone numbers, at least 150 individuals will cooperate and respond to the questions? In other words, what is the probability that the sample proportion will be at least $ \frac{150}{400} = 0.375 $? Calculate the probability to 4 decimals. Use a z-table.

Defines that p is true proportion of telephone numbers that will cooperate and respond to the…

Answered: A market research firm conducts…

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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Suppose that 9% of all athletes in a sport use a banned drug. A test is available that detects 94% of athletes who use the drug. But the test also gives a positive result for 8% of those who do not use the drug. What percent of athletes who test positive for the drug are actually using the drug? Answer: 77.28 %
About 7% of the popular has a mutation. 100 people are randomly selected. What is the mean for the number of people with a mutation?
State the mean and variance of the sampling distribution of the mean?
5: Cal Poly has a vested interest in finding out the level to which its students are content with the various courses offered. They are curious to learn what proportion of students are pleased with the courses they are enrolled in at the moment. The provost believes that 27 % of Cal Poly students are pleased with the courses. A group was asked in front of the library if they were content with the various courses offered. Out of the 113 students asked, 31 students were content with the various courses offered
A teacher asks 200 volunteers to compete a survey. Responses to the question "do you own a car" (yes or no) were recorded. Please explain why this is not a binomial distribution.
The mean salary of 5 employees is $41400. The employee salaries have 2 modes: $33500 and $48000. If the median salary gets a $1600 raise, then what is the new mean and new median?
An insurance company crashed four cars of the same model at 5 miles per hour. The costs of repair for each of the four crashes were $444, $447, $470, and $207 O. Compute the mean, median, and mode cost of repair. Compute the mean cost of repair. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The mean cost of repair is $ (Round to the nearest cent as needed.) O B. The mean does not exist. Compute the median cost of repair. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The median cost of repair is $ (Round to the nearest cent as needed.) O B. The median does not exist. Compute the mode cost of repair. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The mode cost of repair is $ (Round to the nearest cent as needed.) O B. The mode does not exist.
The distances golf balls travel under laboratory testing conditions are normally distributed. The mean is 312 yards. The probability the golf ball travels further than 319 yards is 0.28. Find the probability a randomly selected golf ball travels between 305 yards and 319 yards. Express the answer as a decimal value rounded to the nearest hundredth.

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