In: Statistics and Probability
If the critical t-value for a confidence interval calculation
was 2.756, how big
was the sample?
The t-value is calculated using the T table at a given degree of freedom which is n-1, so then we need to find the value of 2.756 in the given chart and corresponding to that will be the degree of freedom. Hence sample sie will be df+1 so, n=29+1=30