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The average length of life of a brand of light bulb is 2000 hours with a population standard deviation of 120. A sample of 100 light bulbs is to be taken. What is the probability of the sample mean being less than 2020 hours? P(xbar< 2020)
Normally distributed with an average of 125 minutes and a standard deviation of 18 minutes. What is the probability that a student taking this test will finish in 100 minutes or less?
At other casinos, the dealer is required to take a hit on soft 17, but must stay on all other hands with a value of 17, 18, 19, 20, or 21. For this situation, determine the probability of the ending value of the dealer's hand.
a study of the attendance at the university of alabamas basketball games revealed that the distribution of attendance
Estimate the population mean
Determine the probability the transmission will break down between 100,000 and 200,000 miles?
The average number of calories in a small chocolate bar is 225. Suppose that the distribution of calories is approximately normal with 10. Find the probability that a randomly selected chocolate bar will less than 200 calories.
To compile the record chart it is necessary to know the correct average weekly sale to within 1% of its true value. How large a sample size is required?
the weights in pounds of discarded plastic from a sample of households summary statistics are n62 x1.911 s1.065 use a
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
The distribution of box weights is normally distributed with a mean of 9 ounces and a variance of 0.01 ounces. What is the probability of randomly selecting a box containing less than 8.9 ounces?
q1. determine whether a statistical analysis should best involve examination of the population or of a sample in each
city records indicate that the average age of the houses on the west side of town is 43 years with standard deviation
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