Answer:
<h3>The standard error of the mean is <u>15</u></h3>
Step-by-step explanation:
Given that a simple random sample of 64 observations was taken from a large population.
Hence it can be written as n=64
The population standard deviation is 120.
It can be written as 
The sample mean was determined to be 320.
It can be written as 
<h3>To find the standard error of the mean :</h3>
The formula for the standard error of the mean is given by
Now substitute the values in the formula we get
<h3>∴ The standard error of the mean is 15</h3>
Answer:
B. 11/17
Step-by-step explanation:
The total number of marbles in the bag is 34
13 + 9 + 12 = 34
Then you subtract 12 from 34, since you want to know the probability of NOT getting a green marble.
12 - 34 = 22
Then you plug them into the equation:
# of outcomes that satisfy the requirement/ total # of possible outcomes
22/34 = 11/17
Hope this helps!
Answer:
C. 3 3/4
Step-by-step explanation:
40 goes into 120 3 times, so the answer would be 120 - 40.
Which leaves you with 80 people still at the party.
Answer:
70/9
Step-by-step explanation:
9x-81 = -11 *distribute the 9
9x = 70 *add 81 to the other side - isolate the x
x = 70/9
