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Showing of 17 Questions
No. & Date AskedQuestion
# 912 :: 12/3/11
Question 912 has been Answered
Find the appropriate critical statistic for a two tailed test with 20 observations and alpha equal to 0.05.. . .

Critical Value, t-statistic

# 911 :: 12/3/11
Question 911 has been Answered
Find the critical statistic for a one tailed test in the negative direction with 25 observations and alpha equal 0.01.. . .

Critical Value, t-statistic

# 880 :: 3/24/11
Question 880 has been Answered
Describe the similarities between an F-ratio and a t statistic.. . .

t-statistic, F-statistic

# 520 :: 11/23/08
Question 520 has been Answered
Your company asks you to compare a new advertising campaign and the old one. Sample data on the accounts as follows: Old: 40, 28, 35, 38, 31, 42, 26,. . .

Confidence Intervals, Median, Mode, mean, t-statistic, Standard Error of the Mean

# 505 :: 11/11/08
Question 505 has been Answered
Calculate a 98% confidence interval for the following data 15.7,15.7,15.5,15.2,15.2,15.1,15.3.. . .

Confidence Intervals, TINV, Margin of Error, t-statistic

# 504 :: 11/9/08
Question 504 has been Answered
Calculate the 95% confidence interval on the following GPA's from 30 randomly selected students. 0.979 0.891 0.962 0.858 0.909 0.936 0.963 0.9. . .

Confidence Intervals, Margin of Error, t-statistic

# 391 :: 9/18/08
Question 391 has been Answered
An engineer in an automotive factory wishes to know what the tire pressure is on all cars leaving the factory. She measures the tire pressure on a sa. . .

Standard Error of the Mean, t-statistic, Confidence Intervals, Critical Value

# 354 :: 8/20/08
Question 354 has been Answered
A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were 3.0. . .

t-statistic

# 315 :: 8/5/08
Question 315 has been Answered
An engineer in an automotive factory wishes to know what the tire pressure is on all cars leaving the factory. She measures the tire pressure on a sa. . .

Standard Error of the Mean, Standard Deviation, Confidence Intervals, Critical Value, t-statistic

# 311 :: 8/4/08
Question 311 has been Answered
A random sample of 100 pumpkins is obtained and the mean circumference is found to be 40.5 cm. Assuming that the population standard deviation is know. . .

p-value, Null Hypothesis , Alternative Hypothesis , Z-Statistic, t-statistic

# 309 :: 8/4/08
Question 309 has been Answered
A cereal company claims that the mean weight of the cereal in its packets is 14 ounces. The weights in ounces of the cereal in a random sample of 8 of. . .

1-sample t-test, TDIST, t-score, t-statistic

# 301 :: 7/31/08
Question 301 has been Answered
What is the advantage of a t-score over a z-score?. . .

t-statistic, t-score

# 297 :: 7/28/08
Question 297 has been Answered
What is the formula for finding the t-statistic. . .

Newton-Raphson, t-statistic

# 169 :: 4/25/08
Question 169 has been Answered
Various temperature measurements are recorded at different times for a particular city. The mean of 25C is obtained for 60 temperatures on 60 differen. . .

Null Hypothesis , Alternative Hypothesis , t-statistic, Z-Statistic, 1-sample t-test

# 151 :: 4/14/08
Question 151 has been Answered
A random sample of 25 households finds that an average of 2.3 people reside in each house (the standard deviation is 0.35). With a 95% confidence lev. . .

TINV, t-statistic, t-distribution, Confidence Intervals, Standard Error of the Mean, Margin of Error

# 149 :: 4/14/08
Question 149 has been Answered
You are interested in whether men participate more than women in political activities, so you survey 632 men and 675 women and ask them how many polit. . .

2-sample t-test, t-statistic, t-test

# 145 :: 4/8/08
Question 145 has been Answered
Will the t statistics calculated from 4 observations valid?. . .

t-statistic, t-distribution, Small Sample