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A box contains six tickets. Two of the tickets are worth $5 each and the other four are worth $1 each.
(a) If one ticket is drawn, what is the expected value of the game?
(b) If two tickets are drawn, what is the expected value of the game?
There are k types of distinct postcards. How many ways are there to send these postcards to n friends? (Each friend can get zero cards, also multiple copies of the same card.)
Find the 98% confidence interval for the mean number of peaches per tree. How many trees does she need to sample to be accurate within 10 peaches per tree?
suppose that since the early 1950s some ten-thousand independent ufo sightings have been reported to civil
A certain firm specializing in the manufacture and sale of free time clothing has 80 retail stores in Florida and 140 in California. With each state as a stratum, the firm wishes to estimate average sick-leave time per employee for the past year
Country A and Country C spends about the same amount on average per person per year. Which has the greater spread?
Suppose that you select a sample of 100 U.S. hospital patients. The probability is 90% that the sample percentage will be within what symmetrical limits of the population?
What is the probability that an individual shopper spends between $17.25 and $21.60 on impulse buys?
A quality control specialist compares the output from a machine with a new lubricant to the output of machines with the old lubricant.
Define the null hypothesis. If the null hypothesis is rejected then? Read the Z statistic from the normal distribution table:
An automotive manufacture claims mean price of small SUV is $25,071 if hypothesis test is performed how you should interpret a decision,
In a survey of 8000 woman, 5431 say they change their nail polish once a week. Construct a 99% confidence interval for the population proportion of woman who change their nail polish once a week. A 99% confidence interval for the population is??
An aptitude test has a mean of 220 and standard deviation of 10. find the corresponding z score for:
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