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Desrcribe situations where a normal distribution provides a good approximatioon of the sampling distribution of the mean?
For a sample of 36 students in a class the mean score in Mathematics is 72 with a standard deviation of 7. Find the 95% confidence interval for the mean score.
If 100 stolen cars are randomly selected, what is the mean and standard deviation of the number of cars recovered after being stolen?
an experiment is conducted in which 60 participants each fill out a personality test but not according to the way they
low reliability of the variables reduces the correlation coefficient becausea. the deviation scores are less likely to
The outcome of the toss is announced to II. Then II must guess whether I chose the fair or biased coin. If II is correct there is no payoff. If II is incorrect, she loses 1. Draw the game tree.
a new integrated computer system is to be installed worldwide for a major corporation. bids on this project are being
Describe the factors that might cause variation in weight of Tootsie Rolls during manufacture.
Forecast sales for the next day using a three-day weighted moving average where the weights are 3, 1, and 1 (the highest weight is for the most recent number).
We will examine the association between the weight of the car (in thousand of pounds) and the fuel efficiency (in miles per gallon). Shown is the regression output.
you are an engineer in charge of aircraft safety. you want to ensure that the probability of failure between
how much oil wells in a given field will ultimately produce is key information in deciding whether to drill more
explain what will happen to the width of a confidence interval increase decrease or remain the same as a result of
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