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No. & Date Asked  Question 

# 551 :: 12/12/08

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

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

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,
OneTailed Area 
# 507 :: 11/12/08

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

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 
# 12 :: 10/23/07

Can a z score be calculated by input of a proportion only?. . .
Proportion,
ZScore 