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A surbey of 200 workers was asked how much they use the internet at work. 150 said they used it within limits, and 30 said they did not use the internet at work.
Construct a 99% confidence interval estimate for the proportion of all workers who did not use the internet at work
If you want to be 95% confidence of estmating the population mean to within a sampling error of +-4 and the standard deviation is assumed to be 10, what sample size is required?
Derive the standard error of proportion, the margin error and the 95% confidence interval for the proportion indicating preference to flirting.
Use the table to determine whether the correlations are significant and how you would interpret the results. The correlation between speed and strength for 20 women is .567. Test these results at the .01 level using a one-tailed test.
Develop a mathematical programming model and solve. Discuss your results [total profits, total costs, etc].
Using the internal rate of return as a decision criterion, determine whether or not this proposal should be accepted.
A normal population has a mean of 80.0 and a standard deviation of 14.0. Compute the probability of a value between 75.0 and 90.0.
We desire to test at 0.05 level of significance whether modification increases the life of battery. What is our decision rule? Reject null hypothesis if calculated t is less than 1.96.
Is the dependent variable discrete or continuous? interval, or ratio) is used to measure the dependent variable?
Lauren Moore has sold her business for $500,000 and wants to invest in condominium units ( which she intends to rent) and land ( which she will lease to a farmer).
Inventory manager for Itex received wheels bearing from Wheel - Rite a small producer of metal parts , Unfortunately , Wheel -rite can only produce 500 wheel bearings from wheel rite each year.
Suppose there is no cyclical component. Quarterly billing for water usage is shown below describe summer billing for year 5.
More than 13 successes in 19 trials with a 40 percent chance of success. (Round the answer to 4 decimal places.) Fewer than 7 successes in 15 trials with a 40 percent chance of success. (Round the answer to 4 decimal places.)
In a clinical study of an allergy drug, 108 of the 203 subjects reported experiencing significant relief from their symptoms. Using a significance level of .01, test the claim that more than half of all those using the drug experienced relief.
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