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To find a 99% confidence intervals for the population mean.
Denise is a professional swimmer who trains, in part, by running. She would like to estimate the average number of miles in each week. For a random sample of 18 weeks, the mean is 18.5 miles with standard deviation equal to 3.2 miles. Find a 99% confidence interval for the population mean number of weekly miles.
The trail was repeated 54 times with 22 correct identifications and 32 wrong identification.
The Wilcoxon signed rank test is computed for the data and gives a value W + = 161.5. Using the Normal approximation (without the continuity correction) the P-value.
Formulating null and alternative hypothesis to test the claim averaging about $5000.
Compare among expected monetary approach also expected utility approach. Sketch the brokers utility curve and describe what it says about her risk profile.
Find out the expected winnings for a person who buys one ticket.
State the appropriate set of hypothesis to test whether there is a relationship between the variables X and Y.
What is the expected shape of the distribution of the sample mean?
For the 20 test scores shown, find the percentile rank for a score of 86.
Results were analyzed using one -way ANOVA and included SSTR =7 , 102 and SSE = 10 ,511. Are all 8 tapes equally appealing on average? Determine p value?
Develop a 99% confidence interval for the population proportion.
What does r 2 of .73 tell us? Is this a strong or weak correlation? How can you tell?
Use Chebyshev's theorem to determine what percent of values will fall between 58 and 82 for data set with mean of 70 and standard deviation of 4.
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