Question

In a given county, records show that of the registered voters, 50% are Democrats, 35% are Republicans, and 15% are Independents. In an election, 80% of the Democrats, 40% of the Republicans, and 90% of the Independents voted in favor of a parks and recreation bond proposal. If a registered voter chosen at random is found to have voted in favor of the bond, what is the probability that the voter is a Republican?

Answer #1

A company produces 1,000 refrigerators a week at three plants.
Plant A produces 350 refrigerators a week, plant B produces 250
refrigerators a week, and plant C produces 400 refrigerators a
week. Production records indicate that 5% of the refrigerators
produced at plant A will be defective, 3% of those produced at
plant B will be defective, and 7% of those produced at plant C will
be defective. All the refrigerators are shipped to a central
warehouse. If a refrigerator...

In summit county 35% of registered voters are democrats. What is
the probability that in a random sample of 300 voters: A) 100 or
more are democrats? B) Between 100 and 120 are democrats? C) 90 or
fewer are democrats?

Twenty percent of registered voters are Whigs, 35% are Free
Soilers, 35% are Jacksonian Democrats, and 10% are independent. A
focus group of 50 voters is randomly selected from the population
of registered voters.
(a) What is the probability that the sample contains 10 Whigs,
18 Free Soilers, 17 Jacksonian Democrats and 5 independents? You
may use R or any other computational aid to find the answer.
(b) If Jacksonian Democrats and Free Soilers are lumped together
as a single...

2. Republican Presidential candidate Donald Trump promises to
pass a bill to build a wall on the U.S. border. Polls show that 80%
of registered Democrats are against this bill, while 70% of
registered Republicans and 50% of registered Independents favor the
bill. The distribution of party affiliation is 40% Democrat, 35%
Republican, and 25% Independent.
(5) a. What is the probability that someone picked at random
favors the bill?
(5) b. Suppose a randomly selected person does not favor...

Before the presidential debates, it waa expected that the
percentages of registered voters in favor of various candidates to
be as follows.
Democrats 48%
Republicans 38%
Independent 04%
Undecided 10%
After the presidential debates, a random sample of 1200 voters
showed that 540 favored the democrats candidate; 480 were in favor
of the Republican candidate; 40 were in favor of the Independent
candidate, and 140 were undecided. At 95% confidence, test to see
if the proportion of voters has changed.

Answer the question.
CHAPTER 8: ESTIMATION AND CONFIDENCE INTERVALS
1. As degrees of freedom increase, the t-distribution approaches
the:
A. binomial distribution
B. exponential distribution
C. standard normal distribution
D. None of the above
2. Given a t-distribution with 14 degrees of freedom, the area
left of - 1.761 is
A. 0.025
B. 0.05
C. 0.10
D. 0.90
E. None of the above
3. 100 samples of size fifty were taken from a population with
population mean 72. The sample...

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