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Are your finances, buying habits, medical records

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Question

11Are your finances, buying habits, medical records, and phone calls

really private? A real concern for many adults is that computers and the Internet are reducing privacy. A survey conducted by Peter D. Hart Research Associates for the Shell Poll was reported in USA Today. According to the survey, 44% of adults are concerned that employers are monitoring phone calls. Use the binomial distribution formula to calculate the probability of the following.

(a) Out of four adults, none is concerned that employers are monitoring phone calls. (Round your answer to three decimal places.)

(b) Out of four adults, all are concerned that employers are monitoring phone calls. (Round your answer to three decimal places.)

(c) Out of four adults, exactly two are concerned that employers are monitoring phone calls. (Round your answer to three decimal places.)

 
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Porphyrin

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uestion

33 Porphyrin is a pigment in blood protoplasm and other body fluids

that is significant in body energy and storage. Let x be a random variable that represents the number of milligrams of porphyrin per deciliter of blood. In healthy circles, x is approximately normally distributed with mean μ = 44 and standard deviation σ = 10. Find the following probab

(b) x is greater than 16

(c) x is between 16 and 60

(d) x is more than 60 (This may indicate an infection, anemia, or another type of illness.)

 
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Find z such that 4.1% of the standard normal curve

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Question

Find z such that 4.1% of the standard normal curve lies to the right

of z. (Round your answer to two decimal places.)

z =  

31. Find z such that 6% of the standard normal curve lies to the left of z. (Round your answer to three decimal places.)

z =   

 
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sle Royale, an island in Lake Superior

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Question

sle Royale, an island in Lake Superior, has provided an important study site of

wolves and their prey. Of special interest is the study of the number of moose killed by wolves. In the period from 1958 to 1974, there were 296 moose deaths identified as wolf kills. The age distribution of the kills is as follows.

Age of Moose in YearsNumber Killed by WolvesCalf (0.5 yr)

1-5

6-10

11-15

16-20112

45

80

57

2

(a) For each age group, compute the probability that a moose in that age group is killed by a wolf. (Round your answers to three decimal places.)0.5    1-5    6-10    11-15    16-20    

(b) Consider all ages in a class equal to the class midpoint. Find the expected age of a moose killed by a wolf and the standard deviation of the ages. (Round your answers to two decimal places.)

μ=σ=

 
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