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The serum concentration of free T3 (a thyroid hormone) among people between the ages of 30 and 60 is normally-distributed with mean 4.6 pmol/liter and standard deviation 0.5 pmol/liter.
A randomly-selected person between the ages 30 and 60 has a serum concentration of free T3 of 4.2 pmol/liter. What is the z-score associated with this number?
A process is under control and follows a normal distribution with mean 100 and standard deviation 10. In constructing a standard -chart for this process, the control limits are set 3 standard deviations from the mean-i.e., 100 . The probability of o..
A mortgage department of a large bank is studying its recent loans. Of particualr interest is how such factors as the value of the home (in thousands of dollars), education level of the head of the household, age of the head of the household, curr..
in a random sample of 28 four-person tents the mean proce was 344.19 and the standard deviation was 61.32. assume the
For each of the following, calculate the pooled variance and the estimated standard error for the sample mean difference
The mean and the standard deviation of a characteristics of 100 items were found to be 60 &10 respectively at the time of calculations two items were taken as 5 & 45 instead of 30 & 20.
Canine Gourmet Super Breath dog treats are sold in boxes labeled with a net weight of 12 ounces (340grams) per box. Each box contains eight individual 1.5 ounce packets. To reduce the chances of shorting the customer, product design specifications..
What is the probability that a randomly selected household with a head of household in this age group had less than $70 000 in life insurance coverage?"
an electronics store has received a shipment of 25 table radios that have connections for an ipod or iphone. ten of
Develop a research question that addresses one of the unknowns in the question: Positive interactions between the CEO and board members lead to enhanced and better performance of the Corporation.
Develop a 95% confidence interval for the population mean. Develop a 90% confidence interval for the population mean. Develop a 98% confidence interval
The "Visit Europe" travel agency specializes in arranging trips to European cities. A customer, Judy, is interested in information on three cities:
A poll of voters. You are the polling consultant to a member of Congress. An SRS of 500 registered voters finds that 32% name "environmental problems".
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