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1. An investment pays $1000 three quarters of the time, and $0 the remaining time. Its expected value and variance respectively are
2. An investment will pay $2,000 half of the time and $1,400 half of the time. The standard deviation for this investment is:
3. An investment will pay $2000 a quarter of the time; $1,600 half of the time; and $1,400 a quarter of the time. The standard deviation of this asset is:
Make a scatterplot of mileage versus speed. Use a calculator to show that the correlation between speed and mileage is r = 0.
Compute a 95% confidence interval for the population proportion of positive drug tests. Explain why is the normality assumption not a problem despite the very small value of p.
If this side is green, what is the probability that the other side of the card is also green?
a random sample of 2000 men and 2700 women in the age group of 18 to 25 were asked if they still live with their
From these data, compute the cluster sampling estimate of the mean annual revenue of all kibbutzim production units, and give a 95% confidence interval.
Is there evidence of a difference in the median performance between the two methods? (Use x = 0. 05).
a sample of 36 observations is selected from a normal population. the sample mean is 12 and the population standard
an experiment consists of tossing six fair coins. determine the probability density and cumulative distribution
The first has outcome X taking on the values 0, 1, and 2 with equal probabilities; the second results in an (in- dependent) outcome Y taking on the value 3 with probability 1/4 and 4 with probability 3/4.
You are one space short of winning a child's board game and must roll a 1 on a die to claim victory. You want to know how many rolls it might take.
1.a pediatrician is interested in studying the effect of motrin on reducing temperature in young children. four
Should the instructor summarize results with means or with proportions?
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