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A poll reported that 80% of adults were satisfied with the job major airlines were doing. Suppose 12 adults are selected at random and the number who are satisfied are recorded. find the probability that 9 or more are satisfied with the airlines b)between 3 and 6 adults, inclusive, were satisfied.
Testing for two Proportions - Is the difference between the averages statistically significant?
Discuss why sampling is essential to many research designs, and why, if done correctly may be more accurate than attempting census measurement.
Modify above problem (Problem 8th) so that each hardware vendor now demands seventy-five (75) units. Any units available from the vendors that are not shipped cost nothing.)
Five cards are drawn from an ordinary deck without replacement. Find the probability of getting:
Suppose you want to estimate the sample size for a multiple correlation analysis. There are five predictors in your study.
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
What would you predict the price per share to be if 95 million shares were offered?
Test whether the average cycle of sleeping and waking differs significantly from 24 hours.
Design a Huffman source coding scheme that can achieve lossless transmission with lessthan 90 bit/second.
Five test vehicles of each kind were crashed, with results given below. Research question: Are mean crash damages the same for these 3 vehicles?
Based on the answers to a through d, decide whether or not to reject the null hypothesis at the given significance level. Explain your conclusion in the context of the problem.
During the past six months, 73.2% of US households purchased sugar. Assume that these expenditures are approximately normally distributed with a mean of $8.22 and a standard deviation of $1.10. 80% of the households spent more than what amount?
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