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Help with Stating Null and Alternative hypothesis and the theories that support these hypotheses:
Lemarks Studios is looking for advertiser dollars to help with production costs on its newest blockbuster movie. Lemarks Studios has several companies that want product placement in the film. The films producers wonder how many times a product must be seen in the picture to make an impact on the viewer. We will use probability statistics and research to determine how often a product must be visible to remain memorable to "X" percentage of the viewing audience.
Make final recommendations related to defining and explaining the problem and stating the hypothesis that will be tested.
The mean number of flaws per 100 m of material produced on a certain machine at Blanktown Fabrics is 2. If flaws occur randomly, find the probability that in 50 m of material there will be less than 2 flaws.
Calculate the MEAN and STANDARD DEVIATION for the distribution below:
A manager receives a forecast for next year. Demand is projected to be 600 units for the first half of the year and 900 units for the second half.
To find the necessary sample size to achieve the given level of accuracy of prediction.
(a) At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule. (b) Is this a close decision?
Assume that p-value was 0.07, would you reject null hypothesis of equal mean rates for a Type- I error rate of 5%? (Circle one).
Organize data into a frequency distribution. How many classes would you propose? What value would you propose for class interval?
Describe to a person who has never taken a course in statistics the meaning of a grouped frequency table.
Let's treat race of offenders as the independent variable and race of victims as the dependent variable. If we first ignore the independent variable and try to predict race of victim, how many errors will we make?
Can you think of a policy; political, economic, social, or otherwise, that pushes people toward avoiding one type or another?
Construct a 99% confidence interval on the population mean height of all 1-year-old pine seedlings. What are the confidence limits? What statement can be made about the population mean height using the confidence interval?
Why might driver be tempted not to use seat belt "just on this trip"?
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