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Question: a middle school chess club has 5 members: adam, bradley, carol, dave, and ella. two students from the club will be selected at random to participate in the county chess tournament. what is the probability that adam will be selected?
Construct the ninety-five percent confidence interval for the difference in the portion of the populations who prefer MACs.
If you were using the relative frequency of an event to estimate the probablility of the event, would it be better to use 100 trials or 400 trials according to the law of large numbers?
(a) What is an appropriate method for graphing the data? (b) Why is it appropriate?
Racehorse. A man buys a racehorse for $20,000 and enters it in two races. He plans to sell the horse afterward, hoping to make a profit.
If yes, what type of rating errors did Sanders commit? Describe why you think he committed these rating errors.
A national survey of engineering school graduates indicates that only 10% of them have had a course in statistics. (a) Find the probability that in a random sample of five engineering grad uates exactly two have had a course in statistics.
an automobile manufacturer is concerned about a fault in the braking mechanism of a particular model. the fault can on
The assembly time for a product is uniformly distributed between 6 to 10 minutes. The probability of assembling the product between 7 to 9 minutes is
(a) Describe the x distribution and compute the mean and standard deviation of the distribution.
Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major.
What are the critical values X2/L and X2/R that correspond to a 99% confidence level and a sample size of 30?
It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot. What is the standard deviation for the sample proportion?
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