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Showing of 14 Questions
No. & Date AskedQuestion
# 679 :: 4/17/09
Question 679 has been Answered
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
Question 664 has been Answered
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
Question 663 has been Answered
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
Question 587 has been Answered
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
Question 576 has been Answered
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
Question 540 has been Answered
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. . .

1-sample t-test, 1-tailed test, Null Hypothesis , calculating mean, sample variance, Standard Deviation

# 424 :: 9/29/08
Question 424 has been Answered
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 first-time use. . .

1-sample t-test, Alternative Hypothesis , Null Hypothesis , test statistic, p-value

# 345 :: 8/14/08
Question 345 has been Answered
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
Question 332 has been Answered
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
Question 331 has been Answered
When we reject the null hypothesis, we are certain that the null hypothesis is false ?. . .

Null Hypothesis

# 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

# 305 :: 8/2/08
Question 305 has been Answered
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
Question 257 has been Answered
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
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