Fifty people were asked how much they paid for the last smartphone app they purc

Question

Fifty people were asked how much they paid for the last smartphone app they purchased. These data were collected. Let the random variable X be the price paid for the app, and let f(x)= P(X=x) be the probability mass function based on the result of this survey Answer parts a through e below Number Price, xof People $1.00 $2.00 $3.00 $4.00 $5.00 $6.00 $7.00 16 18 10 2 a) Write f as a set of ordered pairs (Type an ordered pair, using integers or decimals. Use a comma to separate answers as needed. Do not include the $ symbol in your answer.) Draw the probability distribution as a histogram. Choose the correct histogram below A. 0.4 0.4 0.2 a 0.2 0.2 a 0.2 12 3 45 6 1234567 1234567 1234567

Explanation / Answer

a) from above  f( ) ={1,2,3,4,,5,6,7} or ={(1,0.32),(2,0.36),(3,0.2),(4,0.06),(5,0.02),(6,0),(7,0.04)}

for histogram : option D is correct

b)

c)

f(3) =0.2

option E is correct

F(3) =0.88

option C is correct

d)

1-f(3) =0.80

option F is correct

1-F(3)=0.12

option A is correct

e) mean =2.26

option F is correct.

x freq f(x)=freq/total freq F(X) xf(x) 1 16 0.32 0.32 0.32 2 18 0.36 0.68 0.72 3 10 0.2 0.88 0.6 4 3 0.06 0.94 0.24 5 1 0.02 0.96 0.1 6 0 0 0.96 0 7 2 0.04 1 0.28 total 50 2.26

Related Questions

Navigate

• Browse (All)
• Browse F
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.