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If their scores are normally distributed, what are the mean and standard deviation of the scores?
Find the probability using the hypergeometric distribution, then the binomial approximation, and finally the Poisson approximation.
Containers arrive at a stocking station on a conveyor at the rate of five per minute. Container weight is 25 kg. Conveyor height is 50 inches and the stocking point is 70 inches above the ground. Th
What is the probability that at least one component fails in the time interval? Given that at least one component failed, what is the probability that component A failed?
You live on Keswick Ridge and commute to campus. Suppose that you have the option of crossing the river at the dam, the Westmoreland St Bridge, or the Princess Margaret Bridge. You tend to take the
If you could persuade them to try retrieval a second time in the event of a failure, suppose that a second try would have a 0.67 probability of retrieval if the memory chips were dry and a 0.1 proba
You also choose at random a device to do your HW on, but is three times more likely to be the laptop than the iPad. If you can't remember what device you did your HW on, what is the probability that
A weather forecaster predicts that the May rainfall in a local area will be between 1 and 7 inches but has no idea where within the interval the amount will be. Let x be the amount of May rainfall i
You are given a loan on which interest is charged over a 4 year period as follows: an effective rate of discount of 6% for the first year
If it is stipulated that an equal number of men and women are to be selected (6 men from the group of 65 men and 6 women from the group of 35 women), what is the probability that Mary's name will be
In a true/false quiz there are two possible answers to each of 5 questions. A student has not studied for the quiz and must guess the answer to each question.What is the probability the student will
A fair coin is tossed 7 times. What is the probability of tossing a "head" on the 7th toss, given that the 6 preceding tosses were also "heads"?
Find the probability distribution ofX(insert a table or draw your own). Find the expected number of defective flash drives is a sample.
Use appropriate words and statistics to describe the statistical results. Based on this data which food seems to be preferred?
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.