Friday

February 27, 2015

February 27, 2015

Posted by **please help - urgent** on Saturday, March 16, 2013 at 8:52am.

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..." What does fail to reject mean?

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

- math -
**bobpursley**, Saturday, March 16, 2013 at 9:25amYour point is well taken. Sometimes academics tend to write in meaningless, ill-defined phrases. Here, it is clear the hypothesis is rejected.

- math -
**please help - urgent**, Saturday, March 16, 2013 at 9:34amSo there is NOT good evidence, correct?

- math -
**bobpursley**, Saturday, March 16, 2013 at 10:05amTHERE IS NOT GOOD EVIDENCE

**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 ...