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Suppose that students in a statistics course were asked whether they preferred multiple choice questions or whether they preferred short answer questions. 71% said that they preferred multiple choice questions. 47% of the students were male. 78% of the males preferred multiple choice. Given that a randomly selected student is a female, what is the probability the student prefers multiple choice questions?
What kind of a study is this?- Will they do a one-tailed or a two-tailed test?- Explain in this context what a Type I error would be.
Parents demonstrate varying levels of warmth, expectations for adherence to rules, and openness of communication with children.
In a study of computer use, 1000 randomly selected Canadian Internet users were asked how much time they spend using the Internet in a typical week
The data file also contains data concerning the median selling price ($thousands). Construct a graph containing the line plot for both the number of sales.
I have 400 feet of lumber to frame a rectangular patio. I want to maximize the area of the patio. What should the dimensions of th patio be.
Suppose that a "code consists of 4 digits, none of which is repeated (A digit is one of the 10 numbers 0,1,2,3,4,5,6,7,8,9) how many codes are possible?
Suppose that you perform a significance test regarding a population mean and that the evidence does not warrant rejection of the null hypothesis.
A random sample of 16 observations is drawn from a population having a normal distribution.
Each machine is up during a cycle time with probability 0.9 and down with probability .1. Machines are up or down independently from each other.
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this the right interpretation for the margin of error?
Find the angle that the string makes with the upward vertical when the ball begins to leave its circular path. Show that, in the subsequent projectile motion, the ball returns to its starting point.
Old Faithful. It is a common belief that Yellowstone's most famous geyser erupts once an hour at very predictable intervals.
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