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The following are zinc concentrations (in mg/ml) in the blood for two groups of rats. Group A received a dietary supplement of calcium, and group B did not. Researchers are interested in variations in zinc level as a side effect of dietary supplementation of calcium.
Group A: 1:31 1:45 1:12 1:16 1:30 1:50 1:20 1:22 1:42 1:14 1:23 1:59 1:11 1:10 1:53 1:52 1:17 1:49 1:62 1:29
Group B: 1:13 1:71 1:39 1:15 1:33 1:00 1:03 1:68 1:76 1:55 1:34 1:47 1:74 1:74 1:19 1:15 1:20 1:59 1:47
(a) Make a back-to-back stem-and-leaf diagram (by hand) for these measurements.
(b) Use the computer to draw side-by-side box plots.
on a given hunting trip the probability that a lion will find suitable prey is .80. if it finds the prey the
A recent census of a small town in Michigan showed that 60% of the residents are male, 20% have college degrees, and 15% are both male and college graduates.
A farm brings 15 tons of watermelon to market. Find a 90% confidence interval for the population mean cash value of this crop. What is the margin of error?
Proportion of college students who prefer drink A: (0.384, 0.424). Identify the point estimate for estimating the true proportion of college students who prefer that drink.
suppose you and a friend are betting on a horse race involving four horses. you can win money in one of the following
the following summary data on proportional stress limits for two different type of woods red oak and douglas fir.type
1. What are degrees of freedom? How are the calculated? 2. What do inferential statistics allow you to infer?
The reinvestment rate for these funds is 3 percent. Anderson uses an 13 percent required return on this project. what is the NPV?
The letters were rotated away from 0 degrees. Interestingly, reaction time decreased after 180 degrees. Can you explain why this might occur?
A sample of 500 respondents in a large metropolitan area was selected to study consumer behavior. Among the questions asked was "do you enjoy shopping for clothing?" Of 240 males, 136 answered yes.
Assume that the smiling time of eight-week old babies, in seconds, follows a uniform distribution between 0 and 23 seconds, inclusive. This means that any smiling time from 0 to and including 23 seconds is equally likely.
a psychologist is investigating the hypothesis that children who grow up as the only child in the household develop
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