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Kobotan [32]
3 years ago
12

Suppose the heights of the members of a population follow a normal distribution. If the mean height of the population is 68 inch

es and the standard deviation is 4 inches, 99.7% of the population will have a height within which of the following ranges?
A. 56 inches to 80 inches
B. 60 inches to 76 inches
C. 64 inches to 72 inches
D. 52 inches to 84 inches
Mathematics
2 answers:
Aleksandr [31]3 years ago
8 0
Hello,
\int\limits^h_0 {\frac{1}{2\pi} * e^{\frac{-(x-68)^2}{2}} dx}=0.4985

==>h=3*4=12
[68-12, 68+12] is the interval

Answer A


juin [17]3 years ago
3 0

Answer:

56 inches to 80 inches

Step-by-step explanation:

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Hello!

To calculate how many votes Mrs. Jones had received, you would begin by converting 70% into a decimal, and then multiplying that decimal by the total number of votes.

Remember, all percentages are out of 100. So, 70/100 can be simplified into 7/10. As a decimal, 7/10 would be 0.7.

Next, we multiply 0.7 by the total number of votes, which is 1,500.

0.7 · 1500 = 1050

Therefore, in this election, Mrs. Jones received 1,050 votes out of the total 1,500 votes casted.

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