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Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F (based on data from the University of Maryland researchers).
a. If you have a body temperature of 99.00 °F, what is your percentile score?b. Convert 99.00 °F to a standard score (or a z-score).c. Is a body temperature of 99.00 °F unusual? Why or why not?d. Fifty adults are randomly selected. What is the likelihood that the mean of their body temperatures is 97.98 °F or lower?e. A person's body temperature is found to be 101.00 °F. Is the result unusual? Why or why not? What should you conclude?f. What body temperature is the 95th percentile?g. What body temperature is the 5th percentile?h. Bellevue Hospital in New York City uses 100.6 °F as the lowest temperature considered to indicate a fever. What percentage of normal and healthy adults would be considered to have a fever? Does this percentage suggest that a cutoff of 100.6 °F is appropriate?
A random sample of 250 adults in a medium size college town were surveyed and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence.
Determine the percent of the days is the price between $38.00 and $40.00?
What are the best-case and worst-case outcomes the owner may face on this product if she implements your suggestion?
Find a research article and clearly define both the null and directional hypothesis that was or could have been tested during the statistical analysis of the data.
Fix-It Copiers advertises mean time of 100 minutes for office calls with standard deviation of 25 minutes. What percentages of calls are completed?
Prepare an analysis of how you developed your instrument. Be sure to describe how you chose your items, how you would norm this instrument.
The Travel Weekly International Air Transport Association survey asked business travelers regarding the purpose for their most recent business trip.
Find the probability that at least one subject experiences headaches. Is it unusual to have at least one of six subjects experience headaches?
Determine the probability that: a) Exactly 3 will have this mild side effect.
Find the 95% confidence interval for the true population mean. Identify the point estimate for mean and margin of error.
The following payoff matrix has been developed for the decision problem. What is the opportunity loss when "A" is Investment alternative and "Decline" is state of nature?
When 297 college students are randomly selected and surveyed, it is found that 126 own a car. Find a 99% confidence interval for the true proportion of all college students who own a car.
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