Answer:
b. Student-t with 48 degrees of freedom
Step-by-step explanation:
For this case we need to use a Two Sample t Test: equal variances.
Assumptions
When running a two-sample equal-variance t-test, the basic assumptions are "that the distributions of the two populations are normal, and that the variances of the two distributions are the same".
Let 
and 
be the sample means of two sets of data of size 
and 
respectively. We assume that the distribution's of x and y are:
Both are normally distributed but without the variance equal for both populations.
The system of hypothesis can be:
Null hypothesis: 
Alternative hypothesis: 
We can define the following random variable:
The random variable t is distributed 
, with the degrees of freedom 
And the pooled variance can be founded with the following formula:
So on this case the best answer would be :
b. Student-t with 48 degrees of freedom
Answer:
k=-2
Step-by-step explanation:
-1*-2=2
-1*-2=20*-2=0
-1*-2=20*-2=02*-2=-4
-1*-2=20*-2=02*-2=-45*-2=10
He can measure the height in inches or centimeters.
The time can be measured in hours.
He can take a measurement of the height in inches or centimeters at a starting point. Then he can let snow fall for a certain number of hours.
Then he divides the height in inches or centimeters by the number of hours to find the rate in inches per hour or centimeters per hour.
Draw a rectangular box. Divide it in two by drawing a line horizontally in between. Write 136 oz on the top side. Then, draw 8 lines vertically to divide the bottom side.
136/8 = 17 cups.
