<span>The minus sign of the z-score shows that the score is below the mean.
6 points below the mean means the difference of the score and mean is -6
z = (X-Mean)/SD
-0.50 = -6 / SD
SD = -6/-0.50 = 12
The population standard deviation = 12</span>
Answer:
4 cm
Step-by-step explanation:
Both the area of a square and the area of a rectangle can be found by multiplying length x width. Because all of the sides of a square are equal, you get 64 when you multiply two sides together to find the area.
Since the rectangle has the same area as the square, that means the rectangle's width has to be a number that equals 64 when multiplied by 16.
So, 64/16 equals 4.
Please mark as brainliest ;)
The answer would be $3.2
Do ya want me to explain my answer
Answer:
Step-by-step explanation:
Z-test should be used when the parent standard deviation is known and the sample size is greater than or equal to 30 (to satisfy the Central Limit Theorem). A T-test should be used when these two rules do not apply.