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Question: Sharks Here are the lengths in feet of 44 great white sharks:
(a) Enter these data into your calculator and make a histogram. Include a sketch of the graph on your paper. Then calculate one-variable statistics. Describe the shape, center, and spread of the distribution of shark lengths.
(b) Calculate the percent of observations that fall within 1, 2, and 3 standard deviations of the mean. How do these results compare with the 68-95-99.7 rule?
(c) Use your calculator to construct a Normal probability plot. Include a sketch of the graph on your paper. Interpret this plot.
(d) Having inspected the data from several different perspectives, do you think these data are approximately Normal? Write a brief summary of your assessment that combines your findings from parts (a) through (c).
Describe how to use the data to construct a bootstrap distribution. What value should be recorded for each of the bootstrap samples - Use technology to construct a bootstrap distribution with at least 1,000 samples and estimate the standard error.
Verify that both the Wilcoxon-Mann-Whitney test and Cliff's method reject at the 0.05 level. Although the Kolmogorov-Smirnov test rejects with α = 0.05, why might you suspect that the Kolmogorov-Smirnov test will have relatively low power in this ..
use example posted in this week lectures section to estimate population proportion. sample proportion is ps 0.48
A production process is known to produce a particular item in such a way that 5 percent of these are defective. If two items are randomly selected as they come off the production line
At.05 significance level, can we conclude that larger proportion of the agents think the economy is expanding this month?
The data in the accompanying table were obtained from the Model Year 2009 Fuel Economy Guide for new automobiles.- Identify the experimental units.- State whether each of the variables measured is quantitative or qualitative.
since previous studies have reported that elite athletes are often deficient in their nutritional intake e.g. total
Pearson Correlation cannot be used to identify non-linear relationships between two variables.
Five pair of shoes print length and height were used to conduct a formal hypothesis test of the claim that there is linear correlation between the two variables. Use the value of r .591and find the appropriate test statistics method at 0.05 signif..
A random sample of 81 credit sales in a department store showed an average sale of $68.00. From past data, it is known that the standard deviation of the population is $27.00.
What is a 90% confidence interval for the mean monthly expenditure on gasoline per household in Slippery Rock?
Using this sample, do you believe the advertising campaign was successful? Why or why not?
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