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A Business professor decides to give a 10-question true-false quiz to determine who has read an assigned chapter. She wants to choose the lowest possible passing grade such that the probability of passing a student who randomly guesses every question is less than 0.2. (A student passes the test if his/her grade is larger than or equal the passing grade.) What score should she set as the lowest passing grade?
Statisticians use terms like trial, outcome and success in a particular way in reference to probability. What do each of these three terms mean in this context?
The manager of a local branch of a bank believes that over the past few years the bank has begun to cater to a different clientele and that the average amount withdrawn from its ATMs is no longer $140.00.
What is it that differentiates a binomial probability distribution from any other probability distribution? & The employees at a General Motors assembly plant are polled as they leave work.
A group of sheep, infested with tapeworms, are randomly divided into two groups as follows. Each sheep is assigned a number (1 through 20) and then 10 numbers
The following table shows the number of miles driven in each trial.
Pollsters attempt to find out whether or not person is a "likely voter" before they count their opinion in poll. If we suppose 40% of registered voters will really vote.
Standard deviation of 10 minutes. A random sample of 16 cars is selected. What is the probability that the sample mean is between 45 and 52 minutes.
Statistical Hypothesis test for the given sample
Create a histogram over five class intervals.
Is this correlation statistically significant? He also found the regression coefficient to be -1.66. Is this regression coefficient statistically significant? Explain why or why not for each.
What is the slope of the least-squares regression line of final-exam scores on pre-exam total scores in this course?
Assume that female students' heights are normally distributed with a mean given by µ = 67.2 in. and a standard deviation given by σ = 3.6 in.
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