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Interpreting Calculator Display In 1920 only 35% of U.S. households had tele- phones, but that rate is now much higher. A recent survey of 4276 randomly selected households showed that 4019 of them had telephones (based on data from the U.S. Census Bureau). Using those survey results and a 99% confidence level, the TI-83 Plus calculator display is as shown.
a. Write a statement that interprets the confidence interval.
b. Based on the preceding result, should pollsters be concerned about results from surveys conducted by telephone?
Suppose that 40% of participants consume caffeine and smoke. If 8 participants are evaluated, what is the probability that: Exactly half of them consume caffeine and smoke?
if a given mesokurtic distribution has a mean of 100 and a standard deviation of 10 find the approximate value of the
The largest salary on the list is $100,000 and is accidentally changed to $1,000,000. What is the new standard deviation?
1 If sampling is done without replacement, the number of possible samples of size n = 5 from the above population is __________
Find the probability that the mean wieght of these 400 bags exceeds 16.6 ounces.
At the 0.05 level ofsignificance, is there evidence of a significant relationship between the agegroup and where people primarily get their news? If so, explain the relationship.
let x and y be i.i.d.unif01and let wx-y.a find the mean and variance of w without yet deriving the pdf.b show that the
given the following table of payoffs use sensitivity analysis to determine at what probability or more you would select
how much money can be withdrawn at the end of 21 years if 6000 is deposited at the end of each year for 14 years and no
The probability of each. If the answer cannot be calculated, enter zero (0) as your answer. Round to 4 decimal places otherwise. YES, you need, therefore, to look at the 5th decimal place.
Convincing evidence to support the claim that fewer than half of adult Americans can name at least one justice currently serving on the Supreme Court.
1. you earned a 7.1 nominal rate of return on your investments over the past year. but at the same time the reported
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