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1) Every time you go to a beach for vacation, you take home a little sand to keep as a souvenir. Over your lifetime, you have done this exactly 100 times. On each visit the weight of sand you take home (measured in ounces), varies, but follows a U(10-sqt(48)/2, 10+sqt(48)/2) distribution. Assuming the amounts you take home on each trip are independent, estimate the probability that you have collected at least 980, but no more than 1030 ounces of sand.
2) You have a list of chores to do at home, but are expecting family to arrive shortyly. The amount of tie until their arrival (measured in hours) can be modeled as an Exp(2) random variable. Your list of chores contains 4 activities each of which take 15 minutes to complete. Let X be the (whole) number of chore you complete before your family arrives. Find the CDF of X.
3) Let X and Y be independent random variables with X~U(0,12) and Y~Exp(1). What is Cov(X,Y)?
Random sample with a normal distribution with a mean of 60,000 and standard deviation of 2300. What warranty should the company us if they want 96% of the tires to outlast the warranty?
Construct a 95% confidence interval for the proportion of people disagreeing with the statement.
Black Hole Pizza Parlor instructs its cooks to put a "handful" of cheese on each large pizza. A random sample of six such handfuls were weighed.
It was found that the correlation is about .80 and the regression equation is handspan = 3 + 0.35 height What is the predicted handspan for someone 5 feet tall?
question 1 a researcher wants to study the physical activity levels among adults. the mean weight of adult torontonians
a researcher uses a hypothesis test to evaluate h0 micro 80. which combination of factors is most likely to result in
What is the probability that an assembly chosen at random will have a combined dimension in excess of 262?
Determination of expected value of a random variable. Harrington Health Food stocks 5 loaves of Neutro-Bread. The probability distribution for the sales of Neutro-Bread.
What is the sampling distribution of sample means? What is the mean of the sampling distribution of sample means?
What does r 2 of .73 tell us? Is this a strong or weak correlation? How can you tell?
computing the probability values using normal distribution.information from the department of motor vehicles indicates
Then turn up cards from the top until the first ace appears. What is the expected value of the number of cards required to produce the first ace?
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