View Answered Questions
No. & Date Asked  Question 

# 678 :: 4/17/09

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

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 ,
1Proportion Test 
# 525 :: 11/28/08

Does lovastatin (a cholesterollowering drug) reduce the risk of heart attack? In a Texas study,
researchers gave lovastatin to 2,325 people and an i. . .
2proportion test,
Normal Approximation to Binomial 
# 515 :: 11/19/08

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. . .
2proportion test,
Normal Approximation to Binomial ,
Power,
A/B Testing 
# 501 :: 11/7/08

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

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 ,
1Proportion Test 
# 357 :: 8/25/08

Biting an unpopped kernel of popcorn hurts! As an experiment, a selfconfessed connoisseur of cheap popcorn carefully counted 773 kernels and put them. . .
Confidence Intervals,
Normal Approximation to Binomial ,
Proportion 
# 97 :: 3/1/08

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,
1Sample Proportion Test,
1Proportion Test 