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An average american family spends 927 dollars on christmas gifts with Standard Deviation of 200.
What is the probability that an average christmas spending for a sample of 500 families differs from the average by less than 15 dollars? (assume normal distribution)
If the sum of squares total is 800 and the sum of squares error is 170. What is the r-squared value?
A loan application is received this morning. What is the probability that:
The appropriate probability concepts and your application of them to find resulting data to limit the uncertainty within this business decision.
How many free throws must the second player make in a row in order to confidently reject the same null hypothesis? Use the 95% level of confidence for both players.
Is 0.21, the probability that his wife will vote in the referendum is0.28, and the probability that both the husband and wife will voteis 0.15. What is the probability that: at least one member of a married couple will vote?
find the contribution margin per haircut. with the barbers compensation at a fixed cost what are the totals?find the
The random variables, X and Y, have a probability density function given by: By transformation of variables, find the probability density function of Z=X+Y.
Assume that each shipment contains a random sample of bearings. a. What is the probability that a given shipment is acceptable?
In the following study, participants were randomly assigned to receive humanistic therapy, psychodynamic therapy, or behavioral therapy for their depression.
Use the information given to calculate the standard error of the mean. Mean systolic blood pressure for a sample of n=324 men is =123.5, and the standard deviation is s=9.
The average price for a new home in a certain neighborhood is $275,000 with a standard deviation of $20,000. What is the probability that a particular home will cost between $280,000 and $300,000?
one of the requirements of a probability distribution is that the sum of the probabilities must be 1 with a small
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