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Seven popular brands of tea are to be used in a blind taste study for consumer recognition. If four distinct brands are chosen from the seven, and if the consumer is NOT allowed to repeat any answer
A psychology class consists of 14 business students and 21 non-business students. Sixteen students in this class are male. Eight students are both female and business majors. The number of men in t
The table below shows the probability that x households are tuned to Monday Night Football on ABC when it is aired. Determine if this is a probability distribution, and if it is, determine the mean
Money accumulates in a fund at an effective annual interest rate of i during the first 5 years, and at an effective annual interest rate of 2i thereafter. A deposit of 1 is made in the fund at time
Please describe solution in detail, especially the assumptions that must be made, ie. what the standard deviation is:
Construct a 95% confidence interval estimate for the population proportion of adult cellphone owners who report that they use their phone to keep themselves occupied during commercials or breaks in
What is the probability of getting a negative test result? Given that you got a positive test result, what is the probability that you are actually healthy (i.e. that you do not have the disease)?
In many ways, comparing multiple sample means is simply an extension of what we covered last week. Just as we had 3 versions of the t-test (1 sample, 2 sample (with and without equal variance), and
A group of mutual funds earned varying annual rates of return in the last year. These rates of return are normally distributed with a mean of 7% and a standard deviation of 19%.
53% of men consider themselves professional baseball fans. you randomly select 10 men and ask each if he considers himself a professional baseball fan.
Determine the probability mass function of X. Round your answers to four decimal places (e.g. 98.7654).
At a certain gas station, 70% of the customers use regular-grade unleaded gas and 30% use higher-grade unleaded gas. It is also known that among the customers using regular-grade gas, 60% will fill
let x denote the number of ticketed airline passengers denied a flight because of overbooking. Suppse that x is a random variable for which p(x)= c(5-x) for x=0,1,2,3,4. Find the numerical value of
What hypothesis that you have recently heard is the most misunderstood? Why is this misunderstanding to prevalent, and what should be done to correct it?
What are binary variables and when would it be necessary to use binary variables in an optimization problem? Give a specific example from a source other than the text.
If the lie detector test tells the expert that the person is truthful, what is the probability that the person is a liar? If the test indicates that the person is a liar, what is the probability that
A simple linear regression relating expenditure to this index was performed. The estimated intercept and slope were a = 1.96 and b = ?0.0211, the sample correlation coefficient between the two vari
What is the probability that a ve-card poker hand is a three of a kind (three cards of one rank, two cards of di erent ranks, which are not the same rank as each other, for example 3 Kings, 1 Ten an
If 16 students are randomly selected, find the probability that their average systolic blood pressure is between 105 and 125. If 25 students are randomly selected, find the probability that their aver
Alice pays Bob a number of dollars equal to the sum of the values of any dice matching Bob's guess. So, for example, suppose Bob guesses 3.
She also agrees to make annual level deposits into a sinking fund that earns 4% annual effective interest so as to accumulate $10,000 at the end of the twelve years. Bob and Barbara discover they ha
Suppose these 2 million tests were done on a variety of machines. If a machine were picked at random, then ten tests picked at random from these tests performed on that mahine, would it be reasonabl
The labor force is the actual number of people eligible for work, both the employed and the unemployed. In one county, men constitute 60% of the labor force. The rates of unemployment are 5.1% and
Consider an x-bar chart where the x-bar statistic is normally distributed and an associated x-bar control chart exists. If the process is in statistical control then what is the type 1 error rate of
The number of shark attacks and death over a recent 5 year period is shown. Find the mean, median, mode, midrange, range, variance and standard deviation for the data. Which data set is more variabl