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In a random sample of patient records in Cutter Memorial Hospital, six-month postoperative exams were given in 90 out of 200 prostatectomy patients, while in Paymor Hospital such exams were given in 110 out of 200 cases. In a left-tailed test for equality of proportions, the p-value is?
Distinguish the various observational study designs and the randomized controlled trial with regard to validity and feasibility.
Basically trying to figure out once you get the test statistics how you determine critical value through the Table chart. Trying to find critical value for test statistics of 2.36 with 10 subjects, 7 had higher scores, 2 had lower scores, and 1 sco..
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours?
In an analysis of variance problem involving 3 treatments and 10 observations per treatment, SSE = 399.6. The MSE for this situation is:
The odds of the Dallas Cowboys winning this year's Super Bowl are 3 to 1. Compute the probability of the Cowboys winning
Create the estimated regression equation by calculating the values of b 0 and b 1
A random sample of 70 printers discovered that a20 of them were being used in small businesses. Find the 99% limit for the population porportion of printers that are used in small businesses.
A professor asked her sophomore students, "How many drinks do you typically have per session? (A drink is defined as one 12oz beer, one 4oz glass of wine, or one 1oz shot of liquor.)"
At α = 0.10, can the researcher conclude that alcohol consumption is related to sex? What kind of Chi-Square test is this?
Based on the information in part (a), what decision should the director make about the books used for the courses if the goal is to keep the cost below $300?
Same survey showed that average length of time each store was in bbusiness is 6 years, with standard deviation of 25 years. Which is more variable, number of magazines or number of years.
Suppose that a guest claims that she played the slot machine 5 times and hit the jackpot twice. Find the probability of exactly 2 jackpots in 5 trials.
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