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Chapter 6: Q.1.3 (page 344)

North Carolina State University posts the grade distributions for its courses online.3Students in Statistics 101in a recent semester received 26%A42%Bs,20%Cs,10%Ds,and2%Fs. Choose a Statistics 101student at random. The student鈥檚 grade on a four-point scale (with A=4) is a discrete random variable Xwith this probability distribution:

Sketch a graph of the probability distribution. Describe what you see .

Short Answer

Expert verified

All the tail of the bar is to the left. Thus, the distribution is skewed to the left

Step by step solution

01

Given information

North Carolina State University posts the grade distributions for its courses online.3Students in Statistics 101in a recent semester received 26%As, 42%Bs, 20%Cs, 10%Ds, and 2%Fs. Choose a Statistics101student at random. The student鈥檚 grade on a four-point scale (with A = 4) is a discrete random variable Xwith this probability distribution:

02

Given information

From Question(1.2) The probability distribution is

The following is an example of a probability distribution:

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86.1in 6wins As a special promotion for its 20-ounce bottles of soda, a soft drink company printed a message on the inside of each cap. Some of the caps said, 鈥淧lease try again,鈥� while others said, 鈥淵ou鈥檙e a winner!鈥� The company advertised the promotion with the slogan 鈥�1in6wins a prize.鈥� Suppose the company is telling the truth and that every 20-ounce
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The deck of 52cards contains 13hearts. Here is another wager: Draw one card at random from the deck. If the card drawn is a heart, you win 2. Otherwise, you lose 1. Compare this wager (call it Wager 2) with that of the previous exercise (call it Wager 1). Which one should you prefer?

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