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Burger Doodle is a fast-food restaurant that processes an average of 680 food orders each day. The average cost of each order is $6.15. Four percent of the orders are incorrect, and only 10% of the defective orders can be corrected with additional food items at an average cost of $1.75. The remaining defective orders have to be thrown out.
Assume that there are 10 pencils available of each color, and different children are allowed to choose the same color.
There are 10 flights from Minneapolis to St. Cloud each day. The probability that any one flight is late is 0.05. Using the binomial probability formula, what is the probability that 1 or more are late?
A random sample of 100 computers showed a mean of 115 gigabytes used with a standard deviation of 20 gigabytes. What is the standard error of the mean.
A public relations intern realizes that she forgot to assemble the consumer panel her boss asked her to do. She panics and decides to randomly ask (independent) people if they will work on the panel for an hour.
Suppose that you do a test for H0: μ = 6 against HA: μ &neq; 6 you obtain a sample mean of 6.5 and the test gives you a a p-value of 6%. We want to connect the p-value to the confidence interval for the mean.
In order to answer the following questions, first draw a density curve describing this distribution. Pay attention to the height of the curve!
The standard deviation of fresh fruit consumption is about 30 pounds. Suppose a researcher took a random sample of 38 people and had them keep a record of the fresh fruit they ate for one year.
While grading in a final exam, an economics professor found that two students have virtually identical answers. She is convinced two cheated but cannot prove it.
The market for olive oil in new York City is controlled by 2-families, Sopranos and Contraltos. Both families will ruthlessly eliminate any other family that attempts to enter New York City olive oil market.
How many samples would be required if we wished to obtain the maximum possible number of samples needed (i.e., we do not want to rely on the 37% estimate from above) with a 95% confidence and 0.03 error?
Nine randomly selected statistics quiz scores are listed below. Use a .10 level of significance to test the claim that the variance of all scores in the population is more than 9. 15,18,10,19,11,12,15,17,15
A null hypothesis is that the average pulse rate of adults is 70. For a sample of 64 adults, the average pulse rate is 71.8. A significance test is done and the p-value is 0.02. What is the most appropriate conclusion based on α of 0.05?
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