Mathematics, 28.05.2020 18:58 terryjessicaa
Are Americans superstitious? A Harris (Feb. 2013) poll of over 2,000 adult Americans was designed to answer this question. One survey item concerned the phrase "see a penny, pick it up, all day long you’ll have good luck." The poll found that about 30 percent of Americans believe finding and picking up a penny is good luck. Consider a random sample of 20 U. S. adults and let x represent the number who believe finding and picking up a penny is good luck. This is a binomial random variable.
A) Find P(x<10)
B) Find P(x>5)
C) What is the expected number (the mean) who believe picking up a penny is good luck.
Answers: 2
Mathematics, 21.06.2019 19:30
Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%
Answers: 2
Mathematics, 21.06.2019 20:30
List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6
Answers: 1
Are Americans superstitious? A Harris (Feb. 2013) poll of over 2,000 adult Americans was designed to...
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