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Assume that salaries are normally distributed, the standard deviation for brand managers in Houston is $19,900, and the standard deviation for brand managers in Los Angeles is $21,800.
Airlines sometimes overbook flights. Suppose that for a plane with 50 seats, 55 passengers have tickets. Define the random variable Y as the number of ticketed passengers who actually show up for th
According to the National Association for College Admissions Counseling and USA Today. 19.8% of college students take at least one class online. What is the probability of randomly selecting a colle
Is it unlikely for someone to use a credit card frequently? How are all of these results affected by the fact that the responses were obtained by those who decided to respond to the survey posted on
In San Francisco, 30% of workers take public transportation daily (USA Today, December 21,2005).
Assume the mean shift is 1.5sigma (sigma is the process standard deviation, that is, the standard deviation of individual observations), what is the probability of type II error under this mean shif
A sample of shoppers was selected and asked questions regarding consumer behavior. One of the questions asked was "Do you enjoy shopping for clothing?" Information regarding the responses is below:
A health researcher is interested in determining whether or not the speed at which people walk is related to their cholesterol levels. He picks 100 adult volunteers at random, checks their cholester
In the game of roulette, a steel ball is rolled onto a wheel that contains 18 red, 18 black, and 2 green slots. If the ball is rolled 25 times, find the probabilities of the following events.
Motorola used the normal distribution to determine the probability of defects and the number of defects expected in a production process. Assume a production process produces items with a mean weigh
The player plays a series of games which ends when the player successfully chooses the winning icon. For such a series of games, find (a) the probability that the player's total score is negative. (
You plan to invest $200,000 in stocks on the Toronto Stock Exchange. If you invest $2000 in any particular stock, your profit will be $400, $200, $0 or -$200 (a loss) with probability 0.25 each. The
Assume that the probability of a failure is the same for any two months and that the occurrence or nonoccurrence of a failure in any month is independent of failures in any other month.
The World Health Organization estimates that 5% of all adults in sub-Saharan Africa are living with HIV/AIDS. A survey takes a random sample of 1600 adults from all over sub-Saharan Africa. What is
While the other manufacturer claims a superior product with a mean of 10V and a standard deviation of only 0.1V If 100 diodes from each manufacturer are measured, what is the probability that their
What is, approximately, the probability of drawing at random a sample of 5 vitamin drops with vitamin content between 60.25 and 60.75 mg? Answer to 3 decimal places.
Using the above data, what is the conditional probability that the death was accidental, given that the victim was male? Please use 3 decimal places.
Seven persons are staying at a hotel. The hotel has twenty-five floors, each with the same number of rooms. Each of the seven persons has been randomly assigned to one of the rooms in the hotel. Wh
A study was conducted to measure the effectiveness of a hypnotism in reducing pain. The measurements are centimeters on a pain scale before and after hypnosis.
Let X be the random variable for the number of times a fair dice is tossed before a six appears. Find E[X]. I tried by making X a geometric distribution and got E[X]=6. However the answer that is gi
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value. Use the
You conducted a Chi-Square Goodness of Fit Test in your ASCI 691 capstone project. Unfortunately, you did not get the sample size you had hoped for during your research. You were able to get 55 in t
The US Senate Committee consists of 8 members. 5 members are Democrates and 3 are Republicans. A subcommittee of size 4 is to be chosen from the members of the Committee. In how ways may this subcom
An online computer retailer sells both desktop and laptop computers. Assume that 8% of the computers that the online retailer sells are desktops.
20 % of all cartons of milk ordered for school lunches are defective in some way. Five such milk cartons are randomly selected. Thus we have independence. What is the probability that none of the sl