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Police on a heavily traveled highway claim that the average car exceeds the speed limit of 65 mph by at least 10 mph. A random sample of 50 cars is evaluated and found to have an average speed of 82.5 mph with a standard deviation for this sample of 7.3 mph. Determine the 95% confidence interval for this example, state the null and alternative hypothesis about the police's claim and determine if the claim is indeed correct at a significance level of α=0.05
Using the above database, compute a t-test comparing males' and females' heights. You must determine which type of t-test to compute. Write a short interpretation of the results.
HI6007 - Business Research Report Proposal A business research topic. Strengthen and improve initial proposal and a brief literature review of the research topic. Produce 2 to 3 pages on background information on your research topic.
Let X be the number obtained on the blue die minus the number obtained on the red die. Draw a histogram for its probability function and a graph for its distribution function.
Below we have comparative boxplots and overlayed normal probability plots for the salivary flow rate. Is it reasonable to assume that the populations are normal? Do we have significant evidence at a = 5% that the mean salivary flow rate are different..
Find the proportion of working days in which anywhere from 750 to 850 tons is mined. Find the probability that on a given day, the yield will be below 665 tons.
Classify the four states as to recurrent or transitive, and for each pair (i, j) of transitive states find the expected number of times the process will be in j starting from state i.
Consider a constraint that represents the use of an essential nutritional resource in an LP. There are 3 variables-- X, Y, and Z. The resource constraint is a nutritional requirement for iron in a diet. It states that each unit of each variable..
Using this information, calculate Beta risk (probability of Type II error) if the true population mean really is 77.
Should Mark use the study? Why? What is the maximum amount Mark should be willing to pay for this study? What is the maximum amount he should pay for any study?
Write a summary describing the distribution of these data with respect to shape and direction of any skew.
The company wants a strategy that will maximize the expected net present value (NPV) of total cash flow for the next three years, where a 15% interest rate.
use the given data to find the minimum sample size required to estimate the population proportion.margin of error 0.044
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