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Find out if a difference between two response sets is significant. I asked 98 boys what modalities they thought were attractive to girls. 35 said athletes; 25 said tough guys. The rest endorsed other modalities at lesser rates.
For the samples summarized below, test the hypothesis at ∞ =.05 that the two variances are equal. Variance Number of data values Sample 1 19 8 Sample 2 9 18
Elephant came up twice as often as any other animal but that all the other animals came up equally often. Assuming there results were true, the probability of tossingan elephant is?
Give a 99% confidence interval for the mean increase in pay for all corporate CEOs.
Suppose that the actual mean value in the population is , what is the probability of a Type II error (incorrectly accepting a false null hypothesis)?
What are some conditions under which business decisions are made using subjective probability concepts? Could you please cite two examples of subjective probability.
Describe ways in which the use of MS Excel as a tool for interpreting data can be used by a manager of an organization.
The mean number of cargo ships that arrive at a port is 3 per day. The port has staff and facilities to handle up to 6 ships in a day. Using the Poisson distribution, find the probability that, on a given day,
If only one bolt is chosen, determine the probability that it will be found defective for only 1 reason (that is. it is either too large or has poor workmanship, but not both.)
If the selected coin is flipped twice and comes up heads twice in a row, what is the probability that the coin is two-headed?
Why is statistical significance not necessarily of practical important difference to a business decision? Give an example and explain.
For each of the following populations, would a score of X = 50 be considered a central score (near the middle of the distribution) or an extreme score (far out in the tail of the distribution)?
Explain the difference between a discrete and a continuous random variable. Give two examples of each type of random variable.
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