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Kitti wants to study the effectiveness of the Statistics course to improve students' scores included a pre-testing score and post-testing score of each student. To compare the differences, I computed (post-testing score - pre-testing score). Seven students were randomly selected and completed both tests. The results follow. Let 1-α = 0.99 and α = 0.01. Students Pre-Testing score Post-Testing score 1 6 8 2 5 5 3 10 10 4 7 10 5 6 8 6 5 6 7 2 8 *Make sure that you set up the hypothesis testing correctly (two-tails, left-tail or right tail)
a. What are the null and alternative hypotheses?
b. Draw the picture of the distribution of the test statistic. Include region (s) of rejection and non- rejection.
c. What is the critical value of the test statistic?
d. What is the value of the test statistic to test for differences in the tests?
e. What is the P-value for differences in the tests? f. State the decision rule and your conclusion.
the average age for licensed drivers in a county is micro 42.6 ? 12 and the distribution is approximately normal. a
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Conduct t-test analysis, using guidelines in the instructions provided - Write your results in a report, using the outline provided
At the 5% significance level, does the proportion of Supporting the policy differ from that of women? alternative hypothesis
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an experiment consists of tossing three unfair coins where the probabilty of tossing a head on each is 25. construct
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Is there an effect due to development time? Plot the mean density for each developer strength for each development time.
a cola dispensing machine is set to dispense 9 oz. of cola per cup with a standard deviation of 1 oz. the manufacturer
What would the interpreter print in response to evaluating each of the following
Suppose 1 in 100,000 is a correct estimate of the chance of such a failure. If a shuttle was launched every day, about how many failures would one expect.
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