Answer:
15r² - 14x - 8
Step-by-step explanation:
- 5x * 3x = 15x²
- 5x * -4 = -20x
- 2 * 3x = 6x
- 2 * -4 = -8
Now add your products,
15x² + -20x + 6x + -8 = 15x² - 14x - 8
The response that represents the 86th percentile is 7.884
The response that represents the 55th percentile is 5.69
The response that represents the first percentile 3.85
<h3 /><h3>How to solve for the 86th percentile</h3>
mean = 5.4
sd = 2.3
p(X>x) = 0.86
find the value of z using the NORMSINV function in excel with a probability of 0.86
z = 1.080
x = mean + sd*z
= 5.4 + 2.3 * 1.080
= 7.88
<h3>How to solve for the 55th percentile</h3>
mean = 5.4
sd = 2.3
p(X>x) = 0.55
find the value of z using the NORMSINV function in excel with a probability of 0.55
z = 0.1257
x = mean + sd*z
= 5.4 + 2.3 * 0.1257
= 5.69
c. The first quartile is 25%
z = -0.6745
5.4 + 2.3 * -0.6745
= 5.4-1.551
= 3.85
Read more on percentile here:
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The answer to the proble is (c) the power property. Look at the picture above!
76.88 I just typed it in on a calculator.
Answer:
C. 151
Step-by-step explanation:
Since there are 6 sides on a die, and one of them is 3, the chance of rolling a 3 is 1/6.
To estimate how many times Susan rolled a 3, multiply 888 by 1/6:
888(1/6)
= 148
So, Susan rolled 3 on the die around 148 times.
This is closest to answer choice C. 151
