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6 Questions returned
No. & Date AskedQuestion
# 551 :: 12/12/08
Question 551 has been Answered
Philadelphia is conducting a study on the characteristics of tourists who drive to Eagles football games. Previous studies indicate that approximately. . .

Sample Size, Confidence Intervals, Proportion

# 521 :: 11/24/08
Question 521 has been Answered
The width of a confidence estimate for a proportion will be: a. Narrower for a 99% confidence interval than for a 95% confidence interval. b. Wider . . .

Confidence Level, Confidence Intervals, Proportion

# 511 :: 11/13/08
Question 511 has been Answered
A machine produces 3 inch nails. A sample of 100 nails is selected, and it is found that 25 are shorter than 3 inches. Find the 95% confidence interv. . .

Proportion, Confidence Intervals, One-Tailed Area

# 507 :: 11/12/08
Question 507 has been Answered
In a survey of 500, 60% responded positively to an value question. Calculate a confidence level at 95% to get an interval estimate for proportion?. . .

Sample Size, Confidence Intervals, Proportion

# 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

# 12 :: 10/23/07
Question 12 has been Answered
Can a z score be calculated by input of a proportion only?. . .

Proportion, Z-Score