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A sample consisting of four pieces of luggage was selected from amoung those checked at an airline counter, yeilding the following data on x=weight (in pounds): x 1 33.5, x2 27.3, x3 36.7, x4 30.5 Suppose that one more piece is selected; denote its weight by x5. Find a value of x5 such that X = smaple median.
In each of the following cases, decide whether or not a binomial distribution is an appropriate model, and give your reasons.
What is the probability of obtaining 4 ones in a row when rolling a fair, six-sided die? Interpret this probability.
For each problem, compute a Welch F-statistic and determine whether or not significant differences exist among the treatment conditions.
The life expectancy of computer terminals is normally distributed with a mean of 4 years and a standard deviation of 10 months. What is the probability that a randomly selected terminal will last more than 5 years?
The payouts for the Powerball lottery and their corresponding odds arean probabilities of occurrence are shown below. The price of a ticket is $1.00. Find the mean and standard deviation of the payout.
The diameters of bolts produced by a certain machine are normally distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches. What percentage of bolts will have a diameter greater than 0.32 inches?
A sample of 81 account balances of a credit company showed an average balance of $1,200 with a sample standard deviation of $126. You want to determine if the mean of all account balances is significantly different from $1,250. Use a .05 level of ..
Accident records given by an insurance company give the following information. The probability that an insured driver has an accident is 0.15. If an accident occurs, the damage to the vehicle amount to 20% of its market value 80% of the time
Five black and five white marbles are in a box. without looking, three marbles are taken from the box without replacement. what is the probability that all three are black?
Use the table to determine whether the correlations are significant and how you would interpret the results. The correlation between speed and strength for 20 women is .567. Test these results at the .01 level using a one-tailed test.
How would you use the "margin of error" in estimating the percentage of all adults who think that Venetian blinds are the hardest to clean?
A group of children can be classified according to eye color (blue, brown, green), gender (male, female), and hobby (collecting stamps, collecting baseball cards, collecting shells, collecting stickers).
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