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8 Questions returned
No. & Date AskedQuestion
# 678 :: 4/17/09
Question 678 has been Answered
A particular candidate claims she has the support of at least 60% of the voters in her district. A random sample of 150 voters yields 87 who support h. . .

test statistic, Normal Approximation to Binomial

# 639 :: 2/28/09
Question 639 has been Answered
CherryBerry Soda, Inc. claims that 15 percent of the population can identify its products. In efforts to boost their identity, CherryBerry employs a f. . .

Normal Approximation to Binomial , 1-Proportion Test

# 525 :: 11/28/08
Question 525 has been Answered
Does lovastatin (a cholesterol-lowering drug) reduce the risk of heart attack? In a Texas study, researchers gave lovastatin to 2,325 people and an i. . .

2-proportion test, Normal Approximation to Binomial

# 515 :: 11/19/08
Question 515 has been Answered
I run various A/B Split tests online. I always set all my tests for 10,000 visitors so page A and B are each equally rotated 5,000 times. My problem. . .

2-proportion test, Normal Approximation to Binomial , Power, A/B Testing

# 501 :: 11/7/08
Question 501 has been Answered
In a survey of adults, 68% thought that DNA test for identifying an individual were very reliable. You randomly select 24 adults and ask each if he or. . .

BINOMDIST, Binomial Probability, Continuity Correction, Normal Approximation, Normal Approximation to Binomial

# 429 :: 9/29/08
Question 429 has been Answered
A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule. . .

Normal Approximation to Binomial , 1-Proportion Test

# 357 :: 8/25/08
Question 357 has been Answered
Biting an unpopped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them. . .

Confidence Intervals, Normal Approximation to Binomial , Proportion

# 97 :: 3/1/08
Question 97 has been Answered
A medical school claims that more than 28% of its students plan to go into general practice. It is found that among a random sample of 130 of the scho. . .

Normal Approximation to Binomial , BINOMDIST, Continuity Correction, 1-Sample Proportion Test, 1-Proportion Test