Answer:
d. The population standard deviation is known.
Step-by-step explanation:
T-distribution or Z-distribution, which to use?
If we have the population standard deviation is known, we use the z-distribution.
Otherwise, if we only have the standard deviation for the sample, we use the t-distribution.
Which of the following is not appropriate to use the t-confidence interval for
When the population standard deviation is known, so letter d.
The mean is the average of the numbers. to find the mean add up the numbers and divide by how many numbers there are
Answer:
x = 11
Step-by-step explanation:
Given the expression;
5x+2y=67 ...1
x=3y−7 ....2
Substitute 2 into 1
5(3y-7)+2y = 67
15y - 35 + 2y = 67
17y = 67+35
17y = 102
y = 102/17
y =6
Recall that x = 3y - 7
x = 3(6) - 7
x = 18 - 7
x = 11
Hence the value of x is 11
To answer this question, you need to know how many drops go into atheism test tube.
Each drop is 1/8 milliliter. The test tube is 30 milliliter.
So, divide 30 by 1/8 to see how many times 1/8 goes into 30.
30 divided by 1/8 = 30 times 8 = 240
It takes 240 drops (that's a lot!) to fill up the test tube.
Hope this helps!
