Hello,
I've lost my revision notes for an exam tomorrow (I know, I know!) and I was hoping someone could help me with the following:
1. deduce the population mean (u)
2. demonstrate how to carry out a hypothesis test at the 0.95 probability level as to whether population mean is greater than 80.
---
This is for grouped data, and I have the following info:
n = 207
Arithmetic mean = 86.64
Median = 79.02
Standard deviation = 24.38
Co-efficient of variation = 28.14
Ql = 69.69
Qu = 102.92
Interquartile range = 86.31
Skewness = 0.94
sum of fx' = 17935
sum of fx'² = 1676975
I'm at a loss to find the answers to the above questions as what information I do have doesn't explain much. Can anyone help?
I've lost my revision notes for an exam tomorrow (I know, I know!) and I was hoping someone could help me with the following:
1. deduce the population mean (u)
2. demonstrate how to carry out a hypothesis test at the 0.95 probability level as to whether population mean is greater than 80.
---
This is for grouped data, and I have the following info:
n = 207
Arithmetic mean = 86.64
Median = 79.02
Standard deviation = 24.38
Co-efficient of variation = 28.14
Ql = 69.69
Qu = 102.92
Interquartile range = 86.31
Skewness = 0.94
sum of fx' = 17935
sum of fx'² = 1676975
I'm at a loss to find the answers to the above questions as what information I do have doesn't explain much. Can anyone help?