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To test whether there is a significant difference in means using One Way ANOVA.
In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated. Five test vehicles of each type were crashed, with the results shown below. Research question: Are the mean crash damages the same for these three vehicles?
Crash Damage ($)
Goliath
Varmint
Weasel
1600
1290
1090
760
1400
2100
880
1390
1830
1950
1850
1250
1220
950
1920
Determine the likelihood of accepting a lot which is 1% defective?
At the 5% significance level, if the sample proportion is .45, and the standard error of the sample proportion is .035, the appropriate conclusion would be:
First explain what the Gini coefficient is and what hypothetical Gini values of 0 and 1 mean. Sort the data by the Gini coefficient in 2000 and look at the list of countries.
Construct a grouped frequency distribution using six classes.
The hypotheses tested by the one-way ANOVA F test - Evaluate the P-value of the ANOVA F test
Is it necessary to assume a normal distribution on the population to estimate the value of the mean spending per day? Explain.
We want to estimate the population mean within 5, with a 99% confidence level. The population std dev is estimated to be 15. How large is the required sample size?
I have fit a line to data representing cholesterol readings for 28 individuals starting a cholesterol reducing drug. The computer provides the following output, The degrees of freedom for the t test for the slope are
Such things as historical documents, newspaper reports, TV and radio broadcasts, when used in research, represents
What percentage of bottles can we expect to have a volume less than 32 oz?
Determine the probability that their SAT scores will differ by more than 50 points?
You find that a random sample of five microwave ovens has a mean repair cost of $75 and a standard deviation of $12.50. At α = 0.01, do you have enough evidence to support the repairer's claim?
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