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Perform the following steps:
a. state the hypotheses and identify the claim.b. find the critical valuesc. compute the test valued. make the decision.e. summarize the results.
The dean of students wants to see ehether there is a significant difference in ages of resident students and commuting students. She selects a sample of 50 students from each group. The ages are shown below.
Resident Students22 25 27 23 26 28 26 24 25 2026 24 27 26 18 19 18 30 26 1818 19 32 23 19 19 18 29 19 2218 22 26 19 19 21 23 18 20 1822 21 19 21 21 22 18 20 19 23Commuter Students18 20 19 18 22 25 24 35 23 1823 22 28 25 20 24 26 30 22 2522 21 18 20 19 26 35 19 19 1819 32 29 23 21 19 36 27 27 2020 21 18 19 23 20 19 19 20 25
At a = 0.05, decide if there is enough evidence to reject the claim of no difference in the ages fo the two groups. Compute and use the standard deviations from the samples.
Consider the following properties of real numbers: Commutative Property of Addition [6] Commutative Property of Multiplication
How to explain the influences on z-scores with constant variables in hypothesis tests with
A college accepted 512 of the 1,600 applicants one year, and 520 of the 1,300 applicants the next year. Can we conclude that the admissions rate was higher the second year than the first year?
Of the 250 students in a blind taste test, 150 (60%) preferred Milwaukee's Best over Natural Light. Then the 90% confidence interval for the student population proportion preferring Milwaukee's Best is:
Twenty air samples were obtained and the carbon monoxide concentrations were recorded. the results in ppm (parts per million) were:
If the voice identifications were made by random guess, find the probability that all 9 victims would select the same person?
Iindicate all samples are approximately Normal with no outliers. Is the ANOVA appropriate?
A sample of size 9 is drawn at random from a Normal distribution. The experiment has a null hypothesis of μ = 0 and an alternate hypothesis of μ > 0. The mean of the sample is 7 with an s of 8. Is there a difference at the 1% level?
Measure of average you might be inclined to report and in what sense each value can be considerd typical. (A) as vice president responsible for collective burgaining.(B) as the president the employee burgaining unit.
For the following statement, write the null hypothesis and the alternative hypothesis. Also label which one is the claim.
Construct a 90% confidence interval for the proportion of all kernels that would not pop.
In a recent study, a random sample of children in grades two through four showed a significant negative relationship between the amount of homework assigned and student attitudes. What is the explanatory variable and what is the response variable?
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