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The diameter of a brand of Ping-Pong balls is approximately normally distributed, with a mean of 1.32 inches and a standard deviation of 0.04 inch. A random sample of 4 Ping-Pong balls is selected.
A) What is the probability that the sample mean is less than 1.27?
B) What is the probability that the sample is between 1.27 and 1.32 inches?
C) The probability is 54% that the sample mean will be between what two values, symmetrically distributed around the population mean? The Lower bound is __ inches. The upper bound is __ inches.
D) What is the sampling distribution of the mean?
If they didn't launch new mixing plant another alternate can contribute twenty five million profit for the same period (i.e. estimated 6 years). Draw the complete decision tree and determine whether the product should be launched or not.
An election coming up next week promises to be very close. In fact, assume that 50% are in favor and 50% are against. Suppose you conduct a poll of 791 randomly selected likey votes. Approx. how different will the percent in favor (from the poll) ..
The value of the z-score that is obtained for a hypothesis test is influenced by several factors. Some factors influence the size of the numerator of the z -score and other factors influence the size of the standard error in the denominator.
Graphical method to solveout the linear programming problem. Describe where the following TEO constraints intersect.
currently available medication is -9.4 minutes with a standard deviation of 2.8 minutes. Construct a 95% CI for the mean difference in times between the experimental and currently available medication.
One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on his bus. Compute the expectations and variances of X and Y?
he life expectancy of a brand of hair dryer is normally distributed wiht a mean of four years and a standard deviation of 8 months.
A vending machine that dispenses coffee into cups must fill the cups with 7.8oz of liquid. Before selling the vending machine to a college or business, the company tests the machine to be sure it is dispensing an average amount of 7.8oz of coffee.
a survey of 90 recently delivered women enrolled in medicaid determined that 28 of them had a history of post partum
Does this data indicate that the sentiment for increasing the speed limit is different for the two groups of residents? Let p1 refer to the urban population.
The nation health department has concerns with the chlorine level of 0.4% mg/mL at a local water park raises to unsafe level.
a refrigerated delivery truck has a load of perishable goods worth 10000. if the refrigeration unit is not cold enough
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