Wednesday

October 22, 2014

October 22, 2014

Posted by **please help** on Saturday, March 16, 2013 at 12:15am.

Scores for a random sample of 3000 students had a xbar = 250 with a standard error 1.0

The 99% confidence interval for the mean score all students in the city is 247.4 to 252.6.

Ques: Is there good evidence that the mean for all students in the city is less than the basic level?

Ans: 243 is not in the 99% confidence level. It is below.

The answer in the back of the book says:"we would fail to reject Ho: u=243 against the one-sided alternative hypothesis Ha: u (less than) 243 at the 1% significance level."

I do not understand the book answer "we would fail to reject..."

Does this mean there IS good evidence that the mean is less than the basic level? or NOT?

- math -
**PsyDAG**, Saturday, March 16, 2013 at 2:40pmHo: µ = 243

Ha: µ < 243

I would definitely reject Ha. But since we have only two hypotheses, that would leave me to "fail to reject" Ho. However, I would rather accept Ha: µ > 243, but that was not an included hypothesis.

**Answer this Question**

**Related Questions**

math - A score of 243 is a "basic" reading level. Scores for a random sample of ...

stats - To estimate the mean score of those who took the Medical College ...

Math - The standard deviation of test scores on a certain achievement test Is ...

statistics - Reading placement scores for a particular college are normally ...

statistics - what are the mean and standard deviation of a sampling distribution...

statistics - SAT Exam Scores – A school administrator wonders if students whose ...

stats - A final exam in Math 160 has a mean of 73 with standard deviation 7.73. ...

statistics - 4. Suppose you administered an anxiety test to a large sample of ...

Statistics - A study of reading ability in schoolchildren chose 60 fifth-grade ...

statistics - I really need help with my statistical analysis... i cant ...