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A public relations intern realizes that she forgot to assemble the consumer panel her boss asked her to do. She panics and decides to randomly ask (independent) people if they will work on the panel for an hour. Since she is willing to pay them for their work, she believes she will have a 75% chance of people agreeing to work with her. Let Y be the number of people she needs to ask until she nds 5 people for her panel.
a) What are the distribution and parameters of Y ?
b) How many people should she expect to ask to ll her panel?
c) What is the probability she needs to ask 8 people before she nds 5 to ll her panel?
d) What is the probability she needs to ask no more than 7 people before she lls her panel?
National polls are often conducted by asking the opinions of a few thousand adults nationwide and using them to infer the opinions of all adults in the nation. Explain who is in the sample and who is in the population for such polls. Please use a ..
Use the above survey results to test the claim that less than half of all Ohio State female students who, if they had a cell phone, would be willing to walk somewhere after dark that they would normally not go. What is the value of the test statis..
Nine randomly selected statistics quiz scores are listed below. Use a .10 level of significance to test the claim that the variance of all scores in the population is more than 9. 15,18,10,19,11,12,15,17,15
Consider the two-period repeated game in which this stage game is played twice and the repeated-game payo s are simply the sum of the payo s in each of the two periods.
You are given the information that P(A) = 0.30 and P(B) = 0.40 (a) Do you have enough information to compute P(A or B)? Explain. (Events A and B are mutually b) If you know that events A and B are mutually exclusive, do you have enough information..
It costs each company Brokely $3,000 per period to use filters that avoid polluting the lake. However, each company must use the lake's water in production
The Candle Company and the Wick Corporation are the only manufactures of a very sophisticated type of flammable material.
If an applicant to a university has taken test A and scored 910 and another student has taken test B and scored 33, compare these students score using Z-values. Which one has a higher relative score?
A famous hypnotist performs to a crowd of 350 students and 180 non-students. The hypnotist knows from previous experience that one half of the students and two third on the non-students are hypnotizable.
An injection molding machine produces golf tees that are 20.0% nonconforming. Using the normal distribution as an approximation to the binomial, find the probability that, in a random sample of 360 golf tees, 65 or less are nonconforming. Show you..
In an enterprise the unit cost of the product is 200 dollars in 2000, 160 dollars in 2005, please calculate the average annual decline rate of unit cost during the period from 2000 to 2005. If in 2010 the unit cost of the product down to 112 dolla..
A worker faces a review every year. He prefers to spend time making if he will be reviewed; otherwise he would prefer to use time somewhere else.
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