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A student takes a 4 question multiple choice quiz with 4 choices for each question. If the student guesses at random on each question, what is the probability that the student gets exactly 2 questions correct?
Now define the statistic of interest to be the proportion correct, X/10. What is the mean of the sampling distribution of this statistic?
assume that a procedure yields a binomial distribution with n trials and the probability of success for one trial is p.
Six participants in a particular fMRI (brain scan) study are measured for the increase in activation of their amygdala while they are viewing pictures.
Construct the 95% confidence interval for the proportion of students with at least one injury.
Analyze the residuals of the regression model identified in using formal hypothesis test, check the adequacy of your regression model.
The final score in a statistics course follows a normal distribution with mean 68 and standard deviation 12. What proportion of students in the course would pass if they need at least 50 to pass in the course
If we assume that each professor has an equal chance of winning, what is the probability that Prof. Weideman will finish second?
The mean number of English courses taken in a two-year time period by male and female college students is believed to be about the same.
According to the U.S. Bureau of the Census, about 75% of commuters in the United States drive to work alone. Suppose 150 U.S. commuters are randomly sampled.
What is the Z-score for a sample of size 87 with mean 64 and standard deviation of 6 compared to a population mean of 70 and a population standard deviation.
The claim is that for measurements of standard head injury criteria in car crashes, u = 475 HIC. The sample size is n = 21 and the test statistic is t = -2.242
What type of primary source is this? What kind of information does this type of source generally contain?
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