a)What is the probability that three cable TV customers subscribe to at least one premium channel? b)What are the mean and standard deviation of cable TV subscribers? C)Assume that when we survey twenty randomly selected cable TV subscribers, we disco that exactly five cable TV customers actually subscribe to at least one premium movie cha Do you believe the executive's claim? Explain your answer with the supporting probabilit letione

a)What is the probability that three cable TV customers subscribe to at least one premium channel? b)What are the mean and standard deviation of cable TV subscribers? C)Assume that when we survey twenty randomly selected cable TV subscribers, we disco that exactly five cable TV customers actually subscribe to at least one premium movie cha Do you believe the executive's claim? Explain your answer with the supporting probabilit letione

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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42)
The standard deviation of monthly rents paid by students in a particular city is assumed to be $ 40. a) If a random sample of 100 students is taken, what is the probability that the sample mean is at least $ 5 higher than the population mean? b) If a random sample of 100 students is taken, what is the probability that the sample mean is at least $ 4 lower than the population mean? c) What should the sample size be so that the probability that the difference between the sample mean and the population mean (negative and positive total) is less than 0.01 $?
We know that football is the favorite sport to watch on television for 36% of adults in the United States. Suppose we take a random sample of 522 adults and obtain their opinions on their favorite sport to watch on television. a) What is the mean of the binomial distribution, rounded to two decimal places? b) What is the standard deviation of the binomial distribution, rounded to four decimal places? c) The probability that 180 to 215, inclusive, will say that football is their favorite sport to watch on television is approximately, rounded to four decimal places, is: d) The probability that 193 or more will say that football is their favorite sport to watch on television, rounded to four decimal places, is approximately
A recent survey of 1011 employees found that 24% of them would lay off their bosses if they could. This is based on arándome sample of 10 employees. a) what is the probability that exactly three employees would lay off their boss? b) what is the probability that three or fewer employees would lay off their bosses? c) what is the probability that five or more employees would lay off their bosses? d) what are the mean and standard deviation for this distribution? The standard deviation of employees that would lay off their bosses is approximately ___. Please help! I have many of these and need help with all steps .
There is a hotel that is opening where guests can rent a single room or double room. 70% of the guests prefer to rent a single room, while the rest prefer to rent a double room. There were 15 guests who were going to stay in the hotel one day. i) What is the mean and the standard deviation of the number of people who prefer to rent a single room? ii) What is the probability that the number of people who want a single room is more than two standard deviations away from the mean ? iii) There are only 13 single rooms and 10 double rooms at the hotel. If the 15 people get checked-in one after another, what is the probability that all of them will be able to rent their preferred kind of room?
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Daily observations for a period of 144 days have been conducted about thenumber of candy bars sold from a vending machine. Using these observations, thesample mean is calculated to be 258 and the sample standard deviation is calculatedto be 60.a.) What is the probability that the sample mean number of candy barssold for the 144-day period is less than 273?b.) What is the probability that the total number of candy bars sold forthe 144-day period is greater than 34,992 but less than 37,872?(c) If the profit per candy bar is 5 cents, what is the probability that theaverage profit per day over the 144-day period is at least $12.65?
An airline knows that the number of suitcases it losses per week is in normal distribution with mean 26,2 and standard deviation - 5.8. Find the probabilities that in one week on the give route it willlose a) Exactly 22 suitcases b) Almost 22 suitcases c) At least 22 suitcases
Q5 A tire manufacturer warranties its tires to last at least 20217 miles or “you get a new set of tires.” In its experience, a set of these tires lasts on average 26217 miles with standard deviation 5062 miles. Assume that the wear is normally distributed. The manufacturer profits Rs. 200 on each set sold, and replacing a set costs the manufacturer Rs. 400. a) What is the probability that a set of tires wears out before 20217 miles? b) What is the probability that a set of tires wears out before 24217 miles and after 20217 miles? c) What is the cutoff value in terms of miles of the top 31% wearing out tires.