View Answered Questions
No. & Date Asked  Question 

# 679 :: 4/17/09

State the null hypothesis, Ho,and the alternative hypothesis, Ha , that would be used to test the claim: The standard deviation has increased from its. . .
Null Hypothesis ,
Alternative Hypothesis 
# 664 :: 4/11/09

If our decision in a hypothesis test is to fail to reject the null hypothesis, then we know that the null hypothesis must be true.
A) True
. . .
Null Hypothesis 
# 663 :: 4/11/09

When we reject the null hypothesis, we are certain that the null hypothesis is false.
A) True
B) False. . .
Null Hypothesis 
# 587 :: 1/26/09

True or False
Generally speaking, the Null Hypothesis is set up for the purpose of either accepting or rejecting it.
If the Null Hypothesis is fal. . .
Null Hypothesis ,
Alternative Hypothesis 
# 576 :: 1/16/09

TRUE or FALSE
The level of significance is the probability that a true hypothesis is rejected.
A Type one error is also referred to as an alpha r. . .
Hypothesis Test,
Alternative Hypothesis ,
Alpha,
Null Hypothesis 
# 540 :: 12/9/08

A sample of 36 observations is selected from a normal population. The sample mean is 21, and the sample standard deviation is 5. Conduct the following. . .
1sample ttest,
1tailed test,
Null Hypothesis ,
calculating mean,
sample variance,
Standard Deviation 
# 424 :: 9/29/08

A recent article in a computer magazine suggested that the mean time to fully learn a new software program is 40 hours. A sample of 100 firsttime use. . .
1sample ttest,
Alternative Hypothesis ,
Null Hypothesis ,
test statistic,
pvalue 
# 345 :: 8/14/08

What are the 5 steps involved in hypothesis testing using the traditional/classical method; Can you use a simple real world example to explain it to m. . .
Null Hypothesis ,
Alternative Hypothesis ,
Hypothesis Test,
Steps in Hypothesis Test 
# 332 :: 8/10/08

If our decision in a hypothesis test is to fail to reject the null hypothesis, then do we know that the null hypothesis must be true?. . .
Null Hypothesis 
# 331 :: 8/10/08

When we reject the null hypothesis, we are certain that the null hypothesis is false ?. . .
Null Hypothesis 
# 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 
# 305 :: 8/2/08

How do I determine what test statistic to use if given a sample of test scores for a present year and a previous year using a .05 significance level t. . .
Continuous Data,
Discrete Data,
Null Hypothesis 
# 257 :: 6/30/08

A company is filling bags of rock salt to a level of 50 pounds. It believes that all bags are filled correctly, but would like to use a hypothesis tes. . .
Null Hypothesis ,
Alternative Hypothesis 
# 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 