1 points | Previous Answers BBUnderStat 12 6.5.014 My Notes Ask Your Te ppose th

Question

1 points | Previous Answers BBUnderStat 12 6.5.014 My Notes Ask Your Te ppose the heights of 18-year-old men are approximately normally distributed, with mean 73 inches and standard deviation 1 hes. (a) What is the probability that an 18-year-old man selected at random is between 72 and 74 inches tall? (Round your answer to four decimal places.) (b) If a random sample of ten 18-year-old men is selected, what is the probability that the mean height X is between 72 and 74 inches? (Round your answer to four decimal places.) (c) Compare your answers to parts (a) and (b). Is the probability in part (b) much higher? Why would you expect this? e The probability in part (b) is much higher because the standard deviation is larger for the distribution. The probability in part (b) is much lower because the standard deviation is smaller for the R distribution. o The probability in part (b) is much higher because the mean is larger for the x distribution. 0 The probability in part (b) is much higher because the standard deviation is smaller for the x distribution. o The probability in part (b) is much higher because the mean is smaller for the x distribution. Need Help? E-Read"-I

Explanation / Answer

a)

b)

c)

the probability in part b is much higher because the std deviaiton is smaller for the xbar distribution

for normal distribution z score =(X-)/ here mean=       = 73 std deviation   == 1.000

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

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