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Consider the following results for two samples randomly taken from two populations.
Sample A Sample B
Sample Size 150 150
Sample Mean 412 405
Sample Std Deviation 128 54
A. At a .01 level of significance, test whether there is a difference between the 2 sample means.
b. Construct a 99 percent confidence interval estimate of the difference between the two sample means.
Normal adult Mean Temperature is 98.2 and standard deviant is 0.62 with normal distribution. If 16 people are randomly selected determine the probability that their mean body temp is below 98.5 degrees.
The following table describes the asset allocation of your portfolio with the corresponding return in percentage, X, and the proportion of that specific asset in the portfolio, P(X).
Research question : At α = . 05, is cockpit noise level independent of flight phase?
Find out: The slack on all activities. The critical activities. The critical path.
A portfolio manager believes that tomorrow's foreign exchange rate of German marks per US dollar will be Normally distributed with mean 2.03 and standard deviation 0.08. Using the manager's numbers:
We will test to determine if there evidence of an improvement on the final examination, at the 1% significance level. What is the alternate hypothesis?
Results of study are summarized below. Use a 5% level of significance and test claim that opinion is independent of brand.
Calculate a 3-month moving average forecast for months 4 through 9 also Compare the two forecasts by utilizing MAD. Which forecast appears to be more accurate.
Find the minimum amount of water pumped in 30 days. Let y be the total number of gallons pumped x days after pumping being. Note that (0,0) is on graph of the equation.
The following table shows the number of miles driven in each trial.
A flour mill produces flour in small bags before distributing them to wholesalers. The average weight of each bags is 8 kg with a standard deviation of 0.5 kg.
Polls showed the two main candidates in 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has a margin of error of less than 1%.
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