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A clinical trial study is done to evaluate joint pain relief. Three different types of pain relief treatments are used. The mean time, in minutes, to pain relief in patients with osteoarthritis is evaluated in men and women. 30 men are randomly assigned to one of the three treatments and likewise 30 women are randomly assigned to one of the three treatments. Essentially, we have two factors: men and women, each with three levels. The alternative hypothesis is that there will be a difference in the mean time to joint pain relief between the groups. The null hypothesis is that there is no significant difference in mean time to joint pain relief in men. The second hypothesis is that there is no significant difference in mean time to joint paint relief in women. And the third null hypothesis is that there is no interaction between the male and female factors.
an apartment building has 8 floors? if seven people get on the elevator on the first floor what is the probability
an election ballot asks voters to select 6 city commissioners from a group of 18 canidates. in how many ways can this
Driving test. You are about to take the road test for your driver's license. You hear that only 34% of candidates pass the test the first time.
many elementary schools have implemented a daily sustained silent reading period during which students faculty and sta
Identify the null hypothesis, alternative hypothesis, test statistic, p-value or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim.
How large a sample must be taken so that the estimate of the mean temperature when the mechanism is set for 350°F is within 1.25°of the population mean.
Examine the data graphically. Do they appear to violate any of the conditions needed to use the one-sample t confidence interval for the population mean?
Determine the allowable torque a hollow steel shaft can transmit if its outside diameter is 4 in. and its inside diameter is 3 in.
Using P-values for hypothesis testing they are intuitively easy and dont require critical values in charts. In real world terms, what is the best way to describe how P-values work and how to explain this to someone?
At a casino, people play the slot machines in hopes of hitting the jackpot, but most of the time, they lose their money. A certain machine pays out an average of $0.92 (for every dollar played), with a standard deviation of $120.
mean micro of 250 screws and a standard deviation ? of 8.30.find the probability that production will go below 238
A sample of 50 customers resulted in a sample mean of $90. What is the probability of obtaining a sample with a sample mean smaller than $90?
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