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Q1) In particular region of Cape Cod, it is known that lobstermen trap on average of 32 pounds of lobster per day with standard deviation of four pounds. If random sample of 30 lobster fishermen is chosen, determine the probability that their average catch is less than 31.5 pounds?
Q2) Mean weight of loads of coal placed in train cars by loading machine is 43.0 tons with standard deviation of 8.0 tons. Suppose that weight of loads placed in train cars by this loader are normally distributed, if random sample of 9 loads is selected for a weight check, determine the probability that mean weight of those loads is more than 40.60 tons.
The first unit produced after the calibration effort to be found to be defective. What is the probability that machine is in adjustment?
What is the 95% confidence interval estimate of the mean television viewing time per week during the 8:00 p.m. to 11:00 p.m. time period?
What is the distribution of X? State its mean and variance.
What is the distinction between a one-sided and a two-sided hypothesis test in this problem?
The standard deviation is estimated to be 0.279. Use the 99% level of confidence.
Recent actual and forecasted data for product XYZ is given in the following table.
A committee of three is selected at random from a set consisting of five Democrats, eight Republicans, and two Independents.
To determine whether two categorical variables are independent, one should use the:
Three times each year, the procurement manager at Phoenix contacts National\'s marketing department to place a monthly order for each of the coming four months.
If an urn is selected at random and a ball is drawn, find the probability it will be red.
What is the city mileage standard deviation for this SUV model?
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
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