Question

**Binomial distribution)** Twelve percent of U.S.
adults eat fast food four to six times per week. You randomly
select 12 U.S. adults. The random variable (x) is the number of
U.S. adults who eat fast food four to six times per week.

a. Find the average number of U.S. adults who eat fast food four to
six times per week. **R****ound**
**your answer to two decimal places.** Blank 1

b. Find the variance of the number of U.S. adults who eat fast food
four to six times per week. **Round** **your
answer to four decimal places.** Blank 2

c. Find the standard deviation of the number of U.S.
adults who eat fast food four to six times per week.
**Round** **your answer to four decimal
places.** Blank 3

Answer #1

A researcher wishes to estimate, with
9090%
confidence, the population proportion of adults who eat fast
food four to six times per week. Her estimate must be accurate
within
55%
of the population proportion.
(a) No preliminary estimate is available. Find the minimum
sample size needed.
(b) Find the minimum sample size needed, using a prior study
that found that
2222%
of the respondents said they eat fast food four to six times per
week.
(c) Compare the results from...

A researcher wishes to estimate, with 95% confidence, the
population proportion of adults who eat fast food four to six times
per week. Her estimate must be accurate within 5% of the
population proportion.
(a) No preliminary estimate is available. Find the minimum
sample size needed.
(b) Find the minimum sample size needed, using a prior study
that found that 20% of the respondents said they eat fast food
four to six times per week.
(c) Compare the results from...

A researcher wishes to estimate, with 90% confidence, the
population proportion of adults who eat fast food four to six times
per week. Her estimate must be accurate within 5% of the
population proportion. (a) No preliminary estimate is available.
Find the minimum sample size needed. (b) Find the minimum sample
size needed, using a prior study that found that 38% of the
respondents said they eat fast food four to six times per week.
(c) Compare the results from...

A fast food restaurant executive wishes to know how many fast
food meals adults eat each week. They want to construct a 95%
confidence interval for the mean and are assuming that the
population standard deviation for the number of fast food meals
consumed each week is 1.4. The study found that for a sample of
1537 adults the mean number of fast food meals consumed per week is
6.4. Construct the desired confidence interval. Round your answers
to one...

A fast food restaurant executive wishes to know how many fast
food meals adults eat each week. They want to construct a 85%
confidence interval with an error of no more than 0.08. A
consultant has informed them that a previous study found the mean
to be 5.6 fast food meals per week and found the standard deviation
to be 1.3. What is the minimum sample size required to create the
specified confidence interval? Round your answer up to the...

Eighty dash four percent of adults in a certain country believe
that life on other planets is plausible. You randomly select five
adults and ask them whether they believe that life on other planets
is plausible. The random variable represents the number of adults
who believe that life on other planets is plausible.
Find the mean, variance, and standard deviation of the binomial
distribution for the random variable. Interpret the results.
Find the mean of the binomial distribution. (Round to...

36% adults favor the use of unmanned drones by police agencies.
Twelve U.S. adults are randomly selected. Find the probability that
the number of U.S. adults who favor the use of unmanned drones by
police agencies is (a) exactly three, (b) at least four, (c)
less than eight.
A.) P(3)=
B.) P(x>4)=
C.) P(x<8)=
round to 3 decimal places

61% of U.S. adults have very little confidence in newspapers.
You randomly select 10 U.S. adults. Find the probability that the
number of U.S. adults who have very little confidence in newspapers
is (a) exactly five, (b) at least six, and (c) less than
four.
(a) P(5) = ?
(Round to three decimal places as needed.)
(b) P(x≥6) = ?
(Round to three decimal places as needed.)
(c) P(x<4) = ?
(Round to three decimal places as needed.)

39% adults favor the use of unmanned drones by police agencies.
Twelve U.S. adults are randomly selected. Find the probability that
the number of U.S. adults who favor the use of unmanned drones by
police agencies is (a) exactly three, (b) at least four, (c)
less than eight.

4.2.20 38% adults favor the use of unmanned drones by police
agencies. Twelve U.S. adults are randomly selected. Find the
probability that the number of U.S. adults who favor the use of
unmanned drones by police agencies is (a) exactly three, (b) at
least four, (c) less than eight.

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