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The degenerative disease osteoarthritis most frequently affects weight-bearing joints such as the knee. The following is a summary of data on stance duration (ms) for samples of both older and younger adults. Assume that both stance duration distributions are Normal.
Age Sample Size Sample Mean Sample SD
Older 28 801 117
Younger 16 780 72
a. Calculate and interpret a 99% CI for true average stance duration among elderly individuals.
b. Carry out a test of hypotheses at significance level 0.05 to decide whether true average stance duration is larger among elderly individuals than younger individuals.
Customers are independent, identical, exponential distrubution of service time. What is the probability that the person will be the last to leave the bank assuming that no other customers arrive?
Jones Nissan in Sumter, South Carolina, sold 10 Nissans yesterday. What is the probability that exactly 1 vehicles require warranty service?
a study found that foot lengths for japanese women are normally distributed with a mean of 24.9 and a standard
A seven member committee of students is formed to study environmental issues. What is the likely hood that anyone of the seven is chosen as the spokes person?
At the .05 significance level, can we conclude that the guideline is still reasonable?
Find the probability that in a given month a) there are exactly 9 days with 0.01 inch or more precipitation, b) there are at most 9 days.
Note that under the exponential assumption, P(X>t) = exp(-t/theta). If t=5, use the result from (a) to find an approximate one-sided lower 95% confidence limit for theta.
Explain how you use data or summaries of data every day-or how data or summari es of data are used on you. Give examples that are different from those provided in the link above,
the amount of distilled water dispensed by a certain machine is normally distributed with mean value 64oz and standard
Construct a 95% confidence interval for the true average amount of time customers spent in the restaurant. With a .95 probability, how large of a sample would have to be taken to provide a margin of error of 2.5 minutes or less?
There are three nursing positions to be filled at Lilly Hospital. Position one is the day nursing supervisor; position two is the night nursing supervisor; and position three is the nursing coordinator position.
A researcher hypothesizes that parents with school-aged children are more likely to vote in favor of a referendum increasing public school construct a zero order school referendum attitude table by parenting status?
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