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A machine fille 8-ounce bottles with soda. A consumer suspects that the machine is not filling the bottles completely. A sample of 8 bottles is taken. Is there enough evidence to support the consumer's conjecture at alpha=.10? 7.2 8.1 7.8 7.4 8.0 8.2 8.1 7.9
Suppose a stock analyst wants to determine whether there is a difference in the mean rate of returns for three types of stock - utility, retail, and banking.
What would that evaluation be and what is the margin of error?
The following payoff matrix has been developed for the decision problem. What is the opportunity loss when "A" is Investment alternative and "Decline" is state of nature?
Assume that the bricks used are randomly chosen from a population of bricks whose mean length is 10 inches and whose standard deviation is 1/32 inch.
To conclude the effect of a new fertilizer on productivity of tomato plants one group of plants is treated with the new fertilizer as a second group is grown without such treatment. The number of ripe tomatoes produced by each group is counted.
Is there a significant difference in the average prices for these two different supermarket chains? Test at α = 0.05
Set up null hypothesis for associated F test.
A certain component is critical to the operation of medical device and must be replaced immediately upon failure. If the mean lifetime of this type of component is 100 hours and its standard deviation is 30 hours, how many of these components must..
The assembly time for a product is uniformly distributed between 6 to 10 minutes.
A statistical analysis of 1,000 long-distance calls made from the headquarters of the Bricks and Clicks Computer Corporation indicates that the length of these calls is normally distributed with μ = 240 seconds and σ = 40 seconds.
What type of error would result in that case? Respond to at least two of your classmate's postings.
Suppose the people have weights that are normally distributed with a mean of 164lb and a standard deviation of 30lb. Find the probability?
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