Questions from Applied Statistics

Q: A hospital’s backup power system has three independent emergency electrical generators,

A hospital’s backup power system has three independent emergency electrical generators, each with uptime averaging 95 percent (some downtime is necessary for maintenance). Any of the generators can ha...

Q: Suppose 50 percent of the customers at Pizza Palooza order a square

Suppose 50 percent of the customers at Pizza Palooza order a square pizza, 80 percent order a soft drink, and 40 percent order both a square pizza and a soft drink. Is ordering a soft drink independen...

Q: The contingency table below summarizes a survey of 1,000 bottled

The contingency table below summarizes a survey of 1,000 bottled beverage consumers. Find the following probabilities or percentages: a. Probability that a consumer recycles beverage bottles. b. Prob...

Q: Based on the previous problem, is major independent of gender?

Based on the previous problem, is major independent of gender? Explain the basis for your conclusion.

Q: At a Noodles & Company restaurant, the probability that a customer

At a Noodles & Company restaurant, the probability that a customer will order a nonalcoholic beverage is .38. Use Excel to find the probability that in a sample of 5 customers (a) none of the 5 will o...

Q: For a continuous PDF, why can’t we sum the probabilities of

For a continuous PDF, why can’t we sum the probabilities of all x-values to get the total area under the curve?

Q: A die is thrown (1, 2, 3, 4

A die is thrown (1, 2, 3, 4, 5, 6) and a coin is tossed (H, T). (a) Enumerate the elementary events in the sample space for the die/coin combination. (b) Are the elementary events equally likely? Expl...

Q: Of grocery shoppers who have a shopping cart, 70 percent pay

Of grocery shoppers who have a shopping cart, 70 percent pay by credit/debit card (event C1), 20 percent pay cash (event C2), and 10 percent pay by check (event C3). Of shoppers without a grocery cart...

Q: A study showed that 60 percent of The Wall Street Journal subscribers

A study showed that 60 percent of The Wall Street Journal subscribers watch CNBC every day. Of these, 70 percent watch it outside the home. Only 20 percent of those who don’t watch CNBC every day watc...

Q: Half of a set of the parts are manufactured by machine A

Half of a set of the parts are manufactured by machine A and half by machine B. Four percent of all the parts are defective. Six percent of the parts manufactured on machine A are defective. Find the...