Question

An insurance company checks police records on 562 accidents selected at random and notes that teenagers were at the wheel in 81 of them. Complete parts a) through d).

**a) Construct the 95% confidence interval for the
percentage of all auto accidents that involve teenage
drivers.**

95% CI = ( ___________ %, _________ % )

(Round to one decimal place as needed.)

**b) Explain what your interval means.**

- We are 95% confident that a randomly sampled accident would involve a teenager a percent of the time that falls inside the confidence interval limits.
- We are 95% confident that the percent of accidents involving teenagers is 14.4%.
- We are 95% confident that the true percentage of accidents involving teenagers falls inside the confidence interval limits.

**c) Explain what "95% confidence" means.**

About 95% of random samples of size 562 will produce (1) __________ that contain(s) the

(2) _________ of accidents involving teenagers.

**d) A politician urging tighter restrictions on
drivers' licenses issued to teens says, "In one of every five
auto accidents, a teenager is behind the wheel." Does the
confidence interval support or contradict this
statement?**

- The confidence interval supports the assertion of the politician. The figure quoted by the politician is inside the interval.
- The confidence interval contradicts the assertion of the politician. The figure quoted by the politician is outside the interval.
- The confidence interval supports the assertion of the politician. The figure quoted by the politician is outside the interval.
- The confidence interval contradicts the assertion of the politician. The figure quoted by the politician is inside the interval.

(1)

- confidence intervals
- a true proportion
- a sample proportion

(2)

- true proportion
- sample proportion
- confidence interval

Please show all of the math. Thank you!

Answer #1

An insurance company checks police records on 596 accidents
selected at random and notes that teenagers were at the wheel at 87
of them. if we want to construct a 95% confidence interval for the
proportion of all auto accidents that involve teenage drivers, what
would be the standard error of the sample proportion of
successes?

An insurance company checks police records on 573 accidents
selected at random and notes that teenagers were at the wheel in 91
of them. Complete parts a) through d).
a) Construct the 95% confidence interval for the percentage of
all auto accidents that involve teenage drivers

An insurance company checks police records on 563 accidents
selected at random and notes that teenagers were at the wheel in 98
of them.
Question: Construct the 95% confidence interval for the
percentage of all auto accidents that involve teenage
drivers.
Answer: 95% CI= (____%,____%) (round to 1
decimal as needed.)

An insurance company checks police records of 560 accidents
selected at random and found that teenagers were at the wheel in
18% of them. Construct a 95% confidence interval for the true
percentage of auto accidents that involve teenage drivers.
Interpret your results.

An insurance company checks police records on 573 accidents
selected at random and notes that teenagers were at the wheel in 83
of them. Complete parts a) through d).
a) Construct the 95% confidence interval for the percentage of
all auto accidents that involve teenage drivers.
95%
CIequals=left parenthesis nothing % comma nothing % right
parenthesis%,%
(Round to one decimal place as needed.)

An insurance company checks police records on 565 accidents
selected at random and notes that teenages were at the wheel in 81
of them. A) creat a 95% confidence interval for the percentage of
all auto accidents that involve teenage drivers. B) explain what
your intervals mean C) explain what 95% condifence means. D) a
politican urging tighter restrictions on drivers licenses issued to
teens says, "In one of every five auto accidents, a teenager is
being the wheel" Does...

1. A consumer advocacy group published a study of labeling of
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25 "red snapper" packages tested were a different kind of fish.
Assume that the study used a simple random sample. Complete parts a
through c below.
a) Are the conditions for creating a confidence interval
satisfied? Explain.
b) Construct a 95% confidence interval for the proportion of
"red snapper" packages that were a different kind of...

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