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1. If it takes 4 hours to cover x miles and 5 hours to cover y miles, what is the average speed?
a) 9b) x/4 + y/5c) (x+y)/9d) 4/x + 5/y
2. If you can make 100 cups of coffee and 125 cups of tea from a gallon milk, how many gallons of milk would you need to make 20 cups of coffee and 25 cups of tea?
a) 0.1b) 0.2c) 0.3d) 0.4
Recognize the given samples are independent samples or matched pairs.
At the .05 significance level, is the number of units produced on the afternoon shift larger?
The manufacturer of a coffee dispensing machine claims the ounces per cup is normally distributed with population mean equal to 8 ounces and standard deviation equal to 0.9 ounces. If 50 cups of coffee were measured, what is the probability that.
1) We are 99% confident that the proportion of patients surveyed that have experienced a reduction in symptoms is between 0.2112 and 0.6638. 2) We are certain that 99% of patients will be between 0.2112 and 0.6638. 3) We cannot determine the proper..
It is estimated that the probability that the general population will live past their 85th birthday is 5.4%. Use the standard normal distribution to approximate this Binomial problem and answer the following questions.
What does central limit theorem say about distribution of John's average payoff after 365 bets in a year?
N=120, population standard deviation is (known) 5, alpha =.05, standard error of the mean (sigma of xbar)= .46, h0 is rejected if xbar
If out of a random sample of college students expressed an intent to vote, can the aide's estimate be rejected at the level of significance? Perform a one-tailed test.
Suppose that the mean systolic blood pressure of normal adults is 120 millimeters of mercury (mm Hg) and the standard deviation is 5.6. Assume the variable is normally distributed.
How do the graphical and computer-based methods of solving LP problems differ? In what ways are they the same? Under what circumstances would you prefer to use the graphical approach?
In order to control costs, a company wishes to study the amount of money its sales force spends entertaining clients. Compute and interpret the Z score for each of the six entertainment expenses.
Test the hypothesis. Will you reject or not reject the null hypothesis at α = 0.05
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