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The sample of test scores is given below. Create a relative frequency histogram of the data with 5 classes. Describe the shape of the distribution.
36
45
50
55
60
65
70
75
80
90
95
1. thirty eight percent of young adults say they use credit cards because of the rewards program. seven young adults
measuring disease frequency in 2000 the crude mortality rate from all causes for haiti a very impoverished country was
joint pmf p(X1,X2)=(X1+2X2)/18, (x1,x2)=(1,1),(1,2),(2,1),(2,2), zero elsewhere. Determine the conditional mean and variance of X2, given X1=x1, for x1=1 or 2. Also compute E(3X1-2X2).
a group of 14 friends got together for a wine contest. each guest brought his or her favorite bottle of pinot noir.
You want to estimate today's mean temperature, so you make a series of measurements (taken as a sample) throughout the day. The mean of these measurements is 63 degrees Fahrenheit, and their standard deviation is 3.4 degrees Fahrenheit.
What was the highest score earned on the exam? According to Chebyshev's Theorem, how many students scored between 42 and 74?
Compare the means of two populations using 96% confidence interval:
Why do the critical values from the Chi-square distribution get larger as the degrees of freedom get larger? Recall that this is opposite the pattern for the t-table.
A person is planning on saving money according to a rigid savings schedule. Saving plan A is to make an initial deposit of $400 and then deposit $20 per month into the account.
Find the mean and the standard deviation of the sampling distribution of -x and find the interval containing 95.44% of all possible sample means returns.
What would happen if the forest service agent took another sample of 31 trees? Would the slope change? Would the intercept change? What about a third sample of 31 trees?
Classify as independent or dependent samples: The average price of gasoline at ten local stations, and the average price of gasoline at ten stations in another state.
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