Sources Of Variation Flashcards
1
Q
What is a 95% confidence interval?
A
It is the range to which we’re 95% certain that the true or underlying value lies
2
Q
What is the value of the null hypothesis, when studying a rate?
A
1
3
Q
If the null hypothesis lies outside the 95% confidence interval, what does this say about the p value?
A
The p value is less than 0.05. We reject the null hypothesis.
4
Q
The smaller the error factor, the smaller the ………. ……
A
Confidence interval
5
Q
More cases = lower ……. ……
A
Error factor
6
Q
How do you calculate the lower and upper confidence interval?
A
Observed value multiplied/divided by the error factor
7
Q
What is the p value?
A
The probability of getting the stated hypothesis close to the observation
