You should use a T distribution to find the critical T value based on the level of confidence. The confidence level is often given to you directly. If not, then look for the significance level alpha and compute C = 1-alpha to get the confidence level. For instance, alpha = 0.05 means C = 1-0.05 = 0.95 = 95% confidence
Use either a table or a calculator to find the critical T value. When you find the critical value, assign it to the variable t.
Next, you'll compute the differences of each pair of values. Form a new column to keep everything organized. Sum everything in this new column to get the sum of the differences, which then you'll divide that by the sample size n to get the mean of the differences. Call this dbar (combination of d and xbar)
After that, you'll need the standard deviation of the differences. I recommend using a calculator to quickly find this. A spreadsheet program is also handy as well. Let sd be the standard deviation of the differences
The confidence interval is in the form (L, U)
L = lower bound
L = dbar - t*sd/sqrt(n)
U = upper bound
U = dbar + t*sd/sqrt(n)
Answer:
L= 11
Step-by-step explanation:
Formula to find the length when you know the area:
L = A/W
So the equation for this one is:
L = 93 1/2 ÷ 8 1/2
Simplify:
L = 11
To be sure of your answer you multiply the L x W = A
11 x 8 1/2 = 93 1/2
Hope this helped : D
Step-by-step explanation:
Check second one
- 1/2 means square root
So
Hence.
Domain is restricted
Option B is correct
