Questions from Applied Statistics

Q: Noodles and Company tested consumer reaction to two spaghetti sauces. Each

Noodles and Company tested consumer reaction to two spaghetti sauces. Each of 70 raters assessed both sauces on a scale of 1 (worst) to 10 (best) using several taste criteria. To correct for possible...

Q: (a) By Chebyshev’s Theorem, at least how many students

(a) By Chebyshev’s Theorem, at least how many students in a class of 200 would score within the range μ 6 2σ? (b) By the Empirical Rule, how many students in a class of 200 would score within the rang...

Q: The weights of newborn babies in Foxboro Hospital are normally distributed with

The weights of newborn babies in Foxboro Hospital are normally distributed with a mean of 6.9 pounds and a standard deviation of 1.2 pounds. (a) How unusual is a baby weighing 8.0 pounds or more? (b)...

Q: An exam has a mean of 70 with a standard deviation of

An exam has a mean of 70 with a standard deviation of 10. Use Chebyshev’s Theorem to find a lower bound for the number of students in a class of 400 who scored between 50 and 90.

Q: A credit card customer at Barnes and Noble can use Visa (

A credit card customer at Barnes and Noble can use Visa (V), MasterCard (M), or American Express (A). The merchandise may be books (B), electronic media (E), or other (O). (a) Enumerate the elementary...

Q: Based on the reported experience of climbers from a given year,

Based on the reported experience of climbers from a given year, a climber who attempts Everest has a 31 percent chance of success.

Q: An entrepreneur who plans to open a Cuban restaurant in Nashville has

An entrepreneur who plans to open a Cuban restaurant in Nashville has a 20 percent chance of success.

Q: Given P(A) = .40, P(B

Given P(A) = .40, P(B) = .50, and P(A ∩ B) = .05, find (a) P(A ∪ B), (b) P(A | B), and (c) P(B | A).

Q: Given P(A) = .70, P(B

Given P(A) = .70, P(B) = .30, and P(A ∩ B) = .00, find (a) P(A ∪ B), (b) P(A | B), and (c) P(B | A).

Q: Suppose Samsung ships 21.7 percent of the liquid crystal displays

Suppose Samsung ships 21.7 percent of the liquid crystal displays (LCDs) in the world. Let S be the event that a randomly selected LCD was made by Samsung. Find (a) P(S), (b) P(S’), (c) the odds in fa...