The grades of a statistics midterm are normally distributed with a mean of 70 and a standard deviation of 2. Without using a cal
culator, what is the probability that a student will receive a grade between 74 and 76? 4.30% 2.15% 34.12% 13.6%
1 answer:
Answer:
.13.5%
Step-by-step explanation:
The probability that a student will receive a grade between 74 and 76 is calculated as follows:
µ+2σ=70+2(2)=70+4=74
µ+3σ=70+3(2)=70+6=76
From the above empirical rule it can be observed that 13.5% of observations fall in between 1 and 2 standard deviations above the mean.
Therefore, the probability that a student will receive a grade between 74 and 76 is 13.5%.
Thus, the correct options is A.13.5%.
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45.21 ÷ 0.3
= 150.7
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I’m guessing it’s D because it just stops on the y-axis and if it was symmetrical then it wouldn’t be a function at all
Let A = arc length of circle
A = 2πr•(degree/360°)
A = 2π(12)(150°/360°)
A = 24π(150°/360°)
Calculate the right side to find A and you're done. Take it from here.
Answer:
0.256 * 10⁻⁵
Step-by-step explanation:
Probability of picking any answer out of 5 given options = 1/5
Total probability for 8 questions = (1/5)⁸ = 0.00000256
= 0.256 * 10⁻⁵
Answer:
-56;+4
Step-by-step explanation:
56 oopposite is -56
-(-4)=+4