View Answered Questions
No. & Date Asked  Question 

# 912 :: 12/3/11

Find the appropriate critical statistic for a two tailed test with 20 observations and alpha equal to 0.05.. . .
Critical Value,
tstatistic 
# 911 :: 12/3/11

Find the critical statistic for a one tailed test in the negative direction with 25 observations and alpha equal 0.01.. . .
Critical Value,
tstatistic 
# 880 :: 3/24/11

Describe the similarities between an Fratio and a t statistic.. . .
tstatistic,
Fstatistic 
# 520 :: 11/23/08

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,
tstatistic,
Standard Error of the Mean 
# 505 :: 11/11/08

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,
tstatistic 
# 504 :: 11/9/08

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,
tstatistic 
# 391 :: 9/18/08

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,
tstatistic,
Confidence Intervals,
Critical Value 
# 354 :: 8/20/08

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. . .
tstatistic 
# 315 :: 8/5/08

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,
tstatistic 
# 311 :: 8/4/08

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. . .
pvalue,
Null Hypothesis ,
Alternative Hypothesis ,
ZStatistic,
tstatistic 
# 309 :: 8/4/08

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. . .
1sample ttest,
TDIST,
tscore,
tstatistic 
# 301 :: 7/31/08

What is the advantage of a tscore over a zscore?. . .
tstatistic,
tscore 
# 297 :: 7/28/08

What is the formula for finding the tstatistic. . .
NewtonRaphson,
tstatistic 
# 169 :: 4/25/08

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 ,
tstatistic,
ZStatistic,
1sample ttest 
# 151 :: 4/14/08

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,
tstatistic,
tdistribution,
Confidence Intervals,
Standard Error of the Mean,
Margin of Error 
# 149 :: 4/14/08

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. . .
2sample ttest,
tstatistic,
ttest 
# 145 :: 4/8/08

Will the t statistics calculated from 4 observations valid?. . .
tstatistic,
tdistribution,
Small Sample 