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Q1) For Mineral Mining Company problem, management thinking of leasing one of the following 2 new trucks to replace excising one:
Trunk type
Weight Capacity
Volume capacity
Additional Cost
Tr 22/12
20,000
960
100
Tr 20/13
18,000
1,080
200
Must the company replace old truck? If so which of new trunks must they use? Describe in detail.
Can we conclude that there is a positive association between the size of the home and the selling price? Use the .05 significance level.
Recognize independent variable and dependent variable for this experiment. Think in your head what influences what? Or, what causes what? Cause is independent variable.
The Bunte Auto Repair Shop received a shipment of four carburetors. One is known to be defective. If two are selected at random and tested.
Define the decision rule. Calculate the value of the test statistic.
If level of significance ( α ) is 0.005 in two-tail test, how large is non rejection region under curve of the t distribution?
The sampling distribution of the average score and Suppose x' is your average pay for the 100 weeks. Then x' has approximately
Use normal approximation to determine probability that x = 2. Illustrate all work.
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of two emails per hour. Suppose the arrival of these emails is approximated by the Poisson distribution.
Concept of statistical signi cance
Subjects at both sites were classified as dropouts if they left the study before the conclusion, or completers if they finished the study
A professor of math refutes the claim that the average student spends 3 hours studying for the midterm exam. Which hypothesis is used to test the claim?
Statistics is science of conducting studies to: Solve a system of equations.
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