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A woman in this age group had a positive mammography in a routine screening. What is the probability that she actually has breast cancer?
What is the probability that the person is 31 or more years old (to 4 decimals)? Is the number of schools applied to independent of age?
Identify three situations where the measured output of a process has a small variation and three situations where the variation is larger (for instance, the time for a phone call to ring the other p
For a sample of 15 PGA Tour players, compute the standard deviation of the number of players who use a Titleist brand golf ball. Round your answer to four decimal places.
A company that manufactures video cameras produces a basicmodel and a deluxe model. Over the past years, 40% of camerassold Have ben of the basic model. Of those buying the basicmodel, 30% purchase
The 70-year long-term record for weather shows that for New York State, the annual precipitation has a mean of 39.06 inches and a standard deviation of 4.28 inches. The annual precipitation amount
Further, the number of books purchased by any customer is independent of the number of books bought by any other customer. What is the probability that (between the two customers currently in line) ex
Birthweights at a local hospital have a normal distribution with a mean of 110 oz. and a standard deviation of 15 oz. The proportion of infants with birthweights below 100 oz. is?
What is your expected value for a game where your probability of winning is 1/6 and you profit is four times your wages?
A men's store purchased a lot of 100 shirts from a certain manufacturer. Although 88 of the shirts were not damaged, the remaining shirts were not suitable to sell. A random sample of 40 shirts is c
What could be a set of null and alternative hypothesis for this experiment? Find MSTR and MSE.
Traditionally, the average price of homes sold in a medium size city in Canada was $220,000. A random sample of 81 homes sold this year showed an average price of $210,000 with a sample sta
When doing an experiment with many groups, what is the problem with doing t test between possible groups without an corrections? Why does use of the analysis of variance avoid that problem?
Find the indicated probabilities using the geometric distribution or poison distrubution. Then determine if the events are unusual, if convenient use the pioson probability table or technology to fi
If the p-value for the interaction term in a Two Factor ANOVA table is 0.057, what do you do? Interaction is significant, so the next step is looking at the main effects.
What is the probability that a 20 year old female will live through her 25th year? What is the probability of dying for males 21-26 years of age?
The mean weight of Lay's mini size chips is 28.3 gram with a standard deviation of 1 gram, what's the probability to get a sample of 30 bags of this kind of chips with an average weight less than 28
How do you find the pooled standard deviation in an ANOVA table?
The mean time to prepare a return is 90 minutes and the standard deviation of the distribution is 14 minutes. Suppose 100 returns from this year are selected and analyzed regarding the preparation.
Use smallest whole number. Example if the ratio was 55,20,20,9 then the expexed ration would be 6:2:2:1 Use smallest whole number.
Develop the linear programming model and determine how many salespersons should be contracted and how should their off-days be allocated.
What is the expected number of cars at the car wash?
An experiment consists of choosing a subset from a fixed number of objects where the arrangement/order of the chosen objects is not important. Determine the size of the sample space when you choose
A box contains 24 yellow, 32 green and 36 red jelly beans. If 15 jelly beans are selected at random, what is the probability that:
Given the returns and probabilities for the three possible states listed here, calculate the covariance between the returns of Stock A and Stock B. For convenience, assume that the expected returns