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A researcher wants to determine an interval estimate for the average weight of all gorillas (in pounds). She wants to be 95% certain that she is within 5 pounds of the true average. From past studies, it is known that the standard deviation of the weights of gorillas is 11.6 pounds. How many gorillas should she sample to achieve these results?
(a) What is the critical value that corresponds to the given level of confidence? Round to two decimals.
(b) What is the minimum sample size necessary to estimate the population mean? Round to the next integer.
In your own words, describe the concept of correlation, include the coefficient of correlation (r) and the coefficient of determination (r2) in your description.
Based on my calculations, what is the arrival and service rate for the express lane with 10 items or less? What is the arrival rate and service rate for the other customers with more than 10 items and what is the average arrival rate and service r..
An oil co. is drilling some wells. the results are described as either a dry well or a producer well. Past experience suggests that 10% of exploratory wells are producer wells.
Which could be called a before-and-after design: a study to see if people can lower their cholesterol by eating oatmeal every day for a month
A large helicopter uses two tandem rotors rotating in opposite directions, as shown in Figure P7.33(a). The controller adjusts the tilt angle of the main rotor and thus the forward motion as shown in Figure DP7.2.The helicopter dynamics are repre..
Calculate a -way anova situation. suppose a school psychologist a classroom setting and you want to find the effect that five teaching styles.
Reject the null hypothesis that there is no difference between the on-the-job anxiety of FIRST and THIRD shift police officers based on a one-tailed negative te
What is the probability a randomly selected student is full-time or enrolled in a math course but not both?
Construct an individuals and a moving-range chart on the data before process improvement changes are made and comment on process stability.
suppose you are using a completely randomized design to study some phenomenon. there are three treatment levels and a
Suppose that on the morning after these games the newspaper's leading sports story begins with the headline " We Win...." What is the probability that the story is about the basketball team?
An example of Simpson's paradox: full-time students do better in both kinds of courses but worse overall because they take more science courses.
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