Im hoping someone can help do this for me. My data is on left of image, the instructions/example are on the right of image under orange text: http://s29.postimg.org/m0fwf679h/Variables.jpg
Construct a 95% confidence interval (Using the following formula: 95% C.I. Equals "mean +/- t*Standard Error" . It also asks for the upper tail and T=, idk how to find that with the t table thing.
You will be using a t-test since you are using data from a sample and you do not know the population standard deviation. You need to calculate the degrees of freedom (df), which equals sample size minus one (df=n-1).
So basically I need these below answered (I already know the mean and standard error I believe, as shown in the image):
----------------
Mean:
Standard Error:
t:
95% C.I.:
Upper limit:
Lower limit:
"this case we are ???....... "
----------------