Question

TV sets: According to the Nielsen Company, the mean number of TV sets in a U.S. household in 2013 was 2.24. Assume the standard deviation is1.1 . A sample of 80 households is drawn. Use the Cumulative Normal Distribution Table if needed.

A. What is the probability that the sample mean number of TV sets is greater than 2? Round your answer to four decimal places.

B. What is the probability that the sample mean number of TV sets is between 2.5 and 3? Round your answer to four decimal places.

C. Find the 10th percentile of the sample mean. Round your answer to two decimal places.

D. Would it be unusual for the sample mean to be less than 2? Round your answer to four decimal places. unusual because the probability of the sample mean being less than

2 is______

E. Do you think it would be unusual for an individual household to have fewer than 2 TV sets? Explain. Assume the population is approximately normal. Round your answer to four decimal places.

.

Answer #1

TV sets: According to the Nielsen Company, the
mean number of TV sets in a U.S. household in 2013 was 2.24. Assume
the standard deviation is 1.3. A sample of 90 households is
drawn.
A) What is the probability that the sample mean number of TV
sets is greater than 2? Round your answer to four decimal
places.
B) What is the probability that the sample mean number of TV
sets is between 2.5and 3? Round your answer to four...

According to Nielsen Media Research, the average number of hours
of TV viewing by adults (18 and over) per week in the United States
is 36.07 hours. Suppose the standard deviation is 9.7 hours and a
random sample of 50 adults is taken.
Appendix A Statistical Tables
a. What is the probability that the sample average
is more than 38 hours?
b. What is the probability that the sample average
is less than 36.5 hours?
c. What is the probability...

According to Nielsen Media Research, the average number of hours
of TV viewing by adults (18 and over) per week in the United States
is 36.07 hours. Suppose the standard deviation is 9.7 hours and a
random sample of 45 adults is taken.
a. What is the probability that the sample
average is more than 38 hours?
b. What is the probability that the sample average
is less than 39.8 hours?
c. What is the probability that the sample average...

According to Nielsen Media Research, the average number of hours
of TV viewing by adults (18 and over) per week in the United States
is 36.07 hours. Suppose the standard deviation is 8.7 hours and a
random sample of 47 adults is taken.
a. What is the probability that the sample
average is more than 36 hours?
b. What is the probability that the sample average
is less than 36.8 hours?
c. What is the probability that the sample average...

According to Nielsen Media Research, the average number of hours
of TV viewing by adults (18 and over) per week in the United States
is 36.07 hours. Suppose the standard deviation is 8.8 hours and a
random sample of 48 adults is taken. Appendix A Statistical
Tables
a. What is the probability that the sample average is more than
35 hours?
b. What is the probability that the sample average is less than
36.6 hours?
c. What is the probability...

According to Nielsen Media Research, the average number of hours
of TV viewing by adults (18 and over) per week in the United States
is 36.07 hours. Suppose the standard deviation is 9.5 hours and a
random sample of 46 adults is taken.
Appendix A Statistical Tables
a. What is the probability that the sample average
is more than 35 hours?
b. What is the probability that the sample average
is less than 36.6 hours?
c. What is the probability...

Annual income: The mean annual income for people in a certain
city (in thousands of dollars) is 43, with a standard deviation of
23. A pollster draws a sample of 91 people to interview.
(a) What is the probability that the sample mean income is less
than 40? Round the answer to at least four decimal places. The
probability that the sample mean income is less than 40 is . Part 2
of 5
(b) What is the probability that...

A TV show, Lindsay and Tobias, recently had a share of 10,
meaning that among the TV sets in use, 10% were tuned to that
show. Assume that an advertiser wants to verify that 10% share
value by conducting its own survey, and a pilot survey begins with
10 households having TV sets in use at the time of a Lindsay and
Tobias broadcast. a. Find the probability that none of the
households are tuned to Lindsay and Tobias. nothing...

A certain TV show recently had a share of 65, meaning that
among the TV sets in use, 65% were tuned to that show. Assume
that an advertiser wants to verify that 65% share value by
conducting its own survey, and a pilot survey begins with 8
households having TV sets in use at the time of the TV show
broadcast. Complete parts (a) through (d) below.
Find the probability that all of the households are tuned to the
TV...

The Internal Revenue Service reports that the mean federal
income tax paid in the year 2010 was $8040. Assume that the
standard deviation is $5000. The IRS plans to draw a sample of 1000
tax returns to study the effect of a new tax law.
A) What is the probability that the sample mean tax is less than
$7900? Round the answer to at least four decimal places.
B) What is the probability that the sample mean tax is between...

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