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A prospective cohort study showed that 200 new cases of disease X occurred in 2,000 person-years. Calculate the person-time incidence rate and 95% confidence interval? Please show work.
q1. a survey was conducted in five countries.the percentages of respondents who said that they eat out once a week or
What is the weighted mean profit per delivery - a bottling company offers three kinds of delivery service - instant, same day and within 5 days.
use normal approximation to estimate the probability of getting more than 49 girls in 100 births. assume that boys and
Confidence interval for the average weight of a nickel. How many nickels does he need to weigh to obtain an average accurate to within 10 milligrams?
Then estimate demand again with a weighted moving average in which sales in the most recent year are given a weight of 2 and sales in the other two years are each given a weight of 1.
q1. calculate a regression that examines whether or not you can predict if a student wants a lecturer to be extroverted
for a population with a mean equal to 100 and a standard deviation equal to 25 calculate the standard error of the mean
from a group of 7 paintings 3 are water colors and 4 are oils. in how many ways can you hang 3 paintings along a wall
The linear correlation coefficient, r, measures the strength of the linear relationship the variables in a set of ordered pairs (x,y). What is the maximum and minimum values for r?
there is a certain disease in america which is very rare. the probability of a person having the disease is 1 in
ph in the water is 7 at the .05 significance level. Her alternative hypothesis is that the water does not have a pH of 7. For which p-value will she fail to reject the null hypothesis?
The manager of a department store wants to determine what proportion of people who enter the store use the store's credit cards for their purchases.
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