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A state lottery has:
1100 prizes of $1
145 prizes of $10
25 prizes of $65
5 prizes of $290
2 prizes of $1290
& 1 prize of $2300.
Assuming 37,000 lottery tickets were sold at $1 each,
A) What is the lottery's expected profit per ticket?
B) What is the lottery's standard deviation of profit per ticket?
A nutritionist conducted an experiment on memory for dreams. She wanted to test whether it really was true that eating cheese before going to bed made you have bad dreams. Over three nights, the nutritionist fed people different foods before bed.
What is the probability that a randomly selected adult regularly consumes both coffee and soda? What is the probability that a randomly selected adult doesn't regularly consume at least one of these two products?
The amount of corn chips dispensed into a 10 ounce bag by the dispensing machine has been identified at possessing a normal distribution with a mean of 10.5 ounces and a standard deviation of .2 ounces.
A doctor prescribed the drug penicillin to three different patients as a form oLtreatment for an infectious disease. It is known from the general population that 20 out of every 100 individuals are allergic to the drug.
1 the blood groups of 200 people is distributed as follows 50 have type a blood 65 have b blood type 70 have o blood
In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken.
Doing A/B testing on an ecommerce web site. I have been working on rule of thumb of 500 vistors through each page or 50 conversions on one of the page before ending the test and deciding which is the best page
Derive a conservative one-sided upper 95% confidence interval for θ if x=4 is observed.
A random sample of 15 paired observations has a correlation of -.46. Can we conclude that the correlation in the population is less than zero? Use the .05 significance level.
Using α = .05 test for significance differences among the population mean wasted time for theses three urban areas. What is the p-value? What is your conclusion?
Think of your favorite casino game (craps, black-jack, roulette, etc) and analyze the probabilities of a few different outcomes.
The Quick Change Oil Company has a number of outlets. The numbers of oil changes at the Oak Street outlet in the past 20 days are: Organize the data into a frequency distribution and include the relative frequency distribution.
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