Statistics Endeavors to:

Choose one • 10 points

Determine trends

Make correlations

Make forecasts

All of the above

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misseylaLv10

23 Jul 2022

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Priyanshu PatelLv10

1 Apr 2021

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Related questions

A survey in 2010 showed that college students study for a statistics exam on average for three hours and ten minutes. To determine if the average time is changed for the statistics exam data gathered from 81 students in a Midwest University. The sample showed that the average studying time for a statistics exam is two hours and fifty minutes with a standard deviation of one hour and thirty minutes. Let .

a. State the null and alternative hypothesis to be tested.

b. Identify the level of significance.

c. Identify the test statistics.

d. Determine the critical value for this test and formulate a decision rule using the critical value.

e. Compute the test statistics.

f. What do you conclude? Interpret the results.

copperfly458

The ages of a group of

125

randomly selected adult females have a standard deviation of

16.2

years. Assume that the ages of female statistics students have less variation than ages of females in the general population, so let

sigmaequals16.2

years for the sample size calculation. How many female statistics student ages must be obtained in order to estimate the mean age of all female statistics students? Assume that we want

95%

confidence that the sample mean is within one-half year of the population mean. Does it seem reasonable to assume that the ages of female statistics students have less variation than ages of females in the general population?

violetreindeer174

I need help conducting a z-test for my assignment. The question states, "You want to determine if Canadians are nicer (less rude) than Americans. Americans 'niceness' score is µ=2.4 with a standard deviation of 1.6. You get a sample of n=36 Canadians to complete the same niceness questionnaire. You calculate descriptive statistics for your sample as M=2.9 and s=1.9. As this is exploratory research, use an alpha of .10. Conduct a z-test on the information above. Make sure to note: 1.) the formula, 2.) the null and alternative hypothesis, 3.) the critical value, 4.) calculate the result (show calculation in case of error), 5.) What is the statistical decision, 6.) What does this mean in plain english?"

Thanks for the help!