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Find the test statistic, p-value and critical value and state a final conclusion.
Caim: The mean IQ score of statistics professors is less than 120
sample data: n=40, mean of the values in a sample = 117, assume that the standard deviation = 14 and the significance level = 0.05
Calculate the test statistic ( round to nearest hundredth)
Find the P-value round to 4 decimal places as needed
Find the critical value, (round to nearest thousandth as needed)
choose one
a. there is sufficient evidence to support the claim
or
b. There is insufficient evidence to support the claim
Steps in hypothesis test procedure - conducting a hypothesis test for some general statistic, ? say.
Compute the appropriate test statistic to test Ho: p = 80/100 vs. Ha: p > 80/100.
Dertermine the probability that a male is a Major or a Colonel?
1st a confidence interval is constructed without utilizing the finite population correction factor.
What is the probability that separates the bottom 25 percent from the rest of the distribution.
Evaluate the strength of the relationship by computing the coefficient of determination.
Construct three scatter plots for: (1) percentage alcohol versus calories, (2) percentage alcohol verses carbobydrates, and (3) calories versus carbohydrates
Using the 0.95 degree of confidence, what is the interval estimate for the population proportion (to the nearest tenth of a percent)?
If we select a crew member at random, what is the probability the crew member earns:
If the data were collected for a sample of 50 households rather than 100, develop an 85% confidence interval estimate of the population mean annual amount spent, assuming the population has a normal probability distribution.
We are interested in testing to find out whether the variance of the population is vitally more than 0.003
What do confidence intervals represent? What is the most controllable method of increasing the precision of or narrowing the confidence interval?
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