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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?
If the alpha level is changed from a = .05 to a = .01, (a) What happens to the boundaries for the critical regions? (b) What happens to the probability of a type I error?
Suppose that 15% of all adults jog. An opinion poll asks a simple random sample of 500 adults if they jog. What is the sampling proportion in the sample who jog?
A college student is taking 5 courses in a semester. He is willing to assume that he will get an A with probability 0.10, a B with probability 0.80, and a C with probability 0.1 in each of the courses. He defines X1, X2, and X3 to be the number of..
An exam consists of 10 true or false questions. If a student guesses at every answer, what is the probability that he or she will answer exactly six questions correctly? (Round the answer to three decimal places)
A large internet retailer, is studying the lead time (elapsed time between when an order is placed and when it is filled) for a sample of recent orders. The lead times are reported in days.
An independent researcher has decided to study variations in TV viewing habits among three American cities. She has managed to randomly sample households in Chicago, Atlanta, and Minneapolis and gather data on the daily "on" times for households o..
A logistic regression model was used to assess the association between CVD and obesity. P is defined to be the probability that the people have CVD.
With a mean of 696 grams and a standard deviation of 37 grams. If you pick one fruit at random, what is the probability that it will weigh between 573 grams and 619 grams.
The sample mean was $22,098 and the standard deviation was $6050. Is there evidence at the 1% significance level that the cost of attendance has increased?
A financial advisor has recommended two possible mutual funds for investment: Fund A and Fund B. The return that will be achieved by each of these depends on whether the economy is good, fair, or poor.
Discuss an element of drinking water where you see a public health gap or need that should be addressed. You may bring up a specific case relevant to your community if you have one, or bring up a global issue.
In estimating a 95% confidence interval estimate of the average number of days absent for the company's workers last year should you use a z or t value in the formula?
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