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1) Find the z-score for which the area to its right is 0.34.
Write only a number as your answer. Round to two decimal places (for example: 0.81).
2) Find z 0.34.
3) Find the z-score for which the area to its left is 0.39.
4) Write only a number as your answer. Round to two decimal places (for example: 0.81).
Consider the following hypotheses:
H0: mean = 5
H1: mean < 5
A test is performed with a sample of size 9. The sample mean was 4.37 with a sample standard deviation of 1.2 . Assume that the population is approximately normal. Use the TI-84 PLUS calculator to compute the P-value.
Round your answer to four decimal places (for example: 0.0138). Write only a number as your answer.
Compute the conditional probability that the first die shows 4, given that the sum of the three numbers showing is 12.
What is the probability that the mean height for the sample is greater than 65 ?inches? Assume sigma s=2.97
For given data, use the 0.05 level in determining whether the treatment effects could all be zero. Using the 0.01 level, evaluate the effectiveness of the blocking variable.
The mean weight of loads of coal placed in train cars by a loading machine is 43.0 tons with a standard deviation of 8.0 tons. Assuming that the weight of loads placed in the train cars by this loader are normally distributed
the data represent the number of driving fatalitites for a certain area by age for male and female drivers.
in a class of 50 students the result of a particular examination is a true mean of 70 and a true variance of 12. it is
Suppose you bought a five-year zero-coupon Treasury bond with $ 1000 face value for $800.
If X is the amount of money (in dollars) that a salesperson spends on gasoline during a day and Y is the corresponding amount of money (in dollars) for which he or she is reimbursed, the joint density of these two random variables is given by
what is the critical f value for a sample of 9 observations in the numerator and 6 in the denominator? use a two-tailed
Some of the Fairly Fun Folks own pets (but only ferrets and fish; no frogs). Of these Folks, 2/5 own fish, 2/20 own both ferrets and fish.
The headlight bulb of a car owned by a professor has an exponential time to failure with a mean of 100 weeks. The professor has fitted a new bulb 50 weeks ago.
If 10 high school students are ramdonly selected. Find the probability that at least 4 will graduate.
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