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The patient recovery time from a particular surgical procedure is normally distributed with a mean of 3 days and a standard deviation of 1.8 days. Let X be the recovery time for a randomly selected patient. Round all answers to 4 decimal places where possible.
a. What is the distribution of X? X ~ N(,)
b. What is the median recovery time? ________days
c. What is the Z-score for a patient that took 4.8 days to recover?
d. What is the probability of spending more than 3.6 days in recovery?
e. What is the probability of spending between 2.9 and 3.7 days in recovery?
f. The 70th percentile for recovery times is ________days.
The following table shows the annual returns (in percent) for Fidelity's Select Electronic and Select Utilities mutual funds.
What is meant by an independent sample? What is a related sample? When should researchers use different hypothesis tests for independent and related samples?
Suppose you perform a multiple regression to predict crime rate in a state and includes as indicators of predictions the homeownership rate divorce rate
Construct a 95% con?dence interval for the mean peak CK activity.
Provide an appropriate answer for each of the proportion confidence interval problems.
And also this based on that information...The FBI says that 500 trustworthy people took the polygraph test.
Compute test statistic and p -value for each sample. (Negative amount must be pointed out by minus sign.)
Regarding four scales referring to levels of measurement: Nominal, Ordinal, Interval and Ratio. Please pick one and discuss one level of measurement, and briefly describe how you would use that type of measurement in a study.
people arrive at a college admissions office at rate 1 per minute. when k people have arrive a tour starts. student
A regulation hockey puck must weigh between 5.5 and 6 ounces. The weights X of pucks made by a particular process are normally distributed with mean 5.75 ounces
Suppose we sample from a normal distribution with mean 0 and unknown tolerance t = 1/s2. Using a Gamma(a, ß) prior for t , determine the general form.
Conduct the appropriate analysis. Should Ho be rejected? What should the researcher conclude?
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