Answer:
And the confidence interval would be given by:
Step-by-step explanation:
Information given
represent the sample mean
population mean
s=50.30 represent the sample standard deviation
n=25 represent the sample size
Confidence interval
The confidence interval for the mean is given by the following formula:
(1)
The degrees of freedom are given by:
The Confidence level is 0.80 or 80%, the value of significance and , the critical value for this case would be:
2 over 3
real:√2, 3,-1, 1/2 etc
natural: 1,2,3,4,5,6.....(0 is not included)
integers:. .............-4,-3,-2,-1,0,1,2,3,4........ etc
rational: nos. which are in p/q form
:1/2,3/4,4/9 etc
irrational: nos. which cannot be written in p/q form
: √2,√3... etc
irrational: √2, √3, √5, √11, √21, π(Pi)
4 is D = 23
the coefficient is the number before the letter