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The following (artificial) data record the length of stay (in days) spent on a psychiatric ward for 28 consecutive patients who have been sectioned under the mental health act, classified according to their gender: Male: 96 113 195 22 56 155 30 50 29 38 25 79 34
Female: 39 71 17 9 35 6 57 10 18 65 35 21 32 28 16
Estimate the median length of stay, giving an approximate 95% confidence interval, for males and females separately.
Carry out a test to determine if there is a significant difference between males and females with regards to the median time spent on a psychiatric ward after being sectioned.
Estimate the probability that a randomly chosen male patient will stay longer than a randomly chosen female patient.
Find the weighted mean if each three-hour course counts for 18%, and each four-hour course counts for 23% of her final semester score.
Simulate arrival of cars at service station for one hour using different stream of random numbers from those used in (a), and calculate average time between arrivals.
Dr. Richmond, a psychologist, is studying the daytime television viewing habits of college students.
A discrete probability is the likelihood that certain discrete data will occur. What is discrete data? Consider a scenario where you could use a discrete probability to predict the likelihood of an event.
Compute an estimate of the standard deviation of y when x = 8. Develop a 95% confidence interval for the expected value of y when x= 8.
Write the null and alternative hypotheses for testing if participants and non-participants differ in level of problem behavior (Y).
For the samples summarized below, test the hypothesis at =0.05 that the two variancees are equal.
What is the probability of obtaining a sample mean greater than M=105, for a random sample of n=9 people? For a random sample of n=36 people?
Perform a hypothesis test with significance level 5%. Show all work, and clearly state your conclusion.
He completed 1st seven times, 2nd three times, and one time each in 6th, 9th,12th, 15th, 22nd and 37t. Determine his median finishing position for the year.
Change the last number in that set from 36 to 14 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme value on the confidence interval.
Grand Strand Family Medical Center is specifically set up to treat minor medical emergencies for visitors to the Myrtle Beach area. There are two facilities, one in the Little River Area and the other in Murrells Inlet.
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