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A researcher is studying the amygdala (a part of the brain involved in emotion). Six participants in a particular fMRI (brain scan) study are measured for the increase in activation of their amygdala while they are viewing pictures of violent scenes. The activation increases are .43, .32, .64, .21, .29 and .51. Figure the (a) mean and (b) standard deviation for this sample of activation increases. (c) Explain what you have done and what the results mean to a person who has never had a course in statistics.
The proportion of 25-29 year olds who are smokers is 0.032
Suppose a random sample of two of these times is selected with replacement.- Find the sampling distribution of the minimum time.- Find the sampling distribution of the total time.
Find a 95% confidence interval for the difference between the following two proportions: the proportion of female customers who order during the evening.
a population standard deviation is estimated to be 13. we want to estimate the population mean within 1.7 with a
Suppose we are considering the selection of the reorder point, R, of a (Q, R) inventory policy. With this policy, we order up to Q when the inventory level falls to R or less. The probability distribution of daily demand is given in Table.
An advantage of the permutation test over the t test for a difference in means is that - distribution interval or a bootstrap percentile interval
What are the null and alternate hypotheses? How many treatments are there? What is the critical value of F at the 5% level of significance? Indicate in words when you would reject the null hypothesis.
In 1997, who announced he was leaving the BBC to stand as an independent candidate in the Tatton constituency in Cheshire?
Estimate the p-value for your t-score and is the difference of means statistically different from zero?
suppose we assume that the temperatures of healthy humans is approximately normal with a mean of 98.6 degrees and a
Standard deviation of 10.6 points. The lower 5% of the class will not get a passing grade. Find the score that separates the lower 5% from the rest of the class.
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