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Zarrin [17]
2 years ago
8

The lengths of a certain species of fish are approximately normally distributed with a given mean (look at the picture) and stan

dard deviation (look at at the picture) . According to the Empirical Rule, what percentage of the fish will have lengths within 1 standard deviation of the mean?
34%
47.5%
68%
99.7%

Mathematics
2 answers:
tatyana61 [14]2 years ago
6 0
The empirical rule states that approximately 68/95/99.7% of a normal distribution lies within 1/2/3 standard deviations. So the answer is 68%.
ella [17]2 years ago
4 0

Answer:

answer C 68%

Step-by-step explanation:

none

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I will give brainiest to whoever answers correctly !!
alex41 [277]

Answer:

What is the question????

7 0
2 years ago
Amanda earned a score of 940 on a national achievement test that was normally distributed. The mean test score was 850 with a st
snow_lady [41]
<span>In math notation, we've done this: z = (X - μ) / σ = (940 - 850) / 100 = 0.90 where z is the z-score X is Vivian's score (940) µ is the mean (850) σ is the standard deviation (100) As you may know, in a normal distribution it's expected that about 68% of all observations will fall within 1 standard deviation of the mean, 95% will fall within 2 standard deviations, and 99% will fall within 3 standard deviations. 
940 lie before the first standard deviation, in which 16.5% is above it
since 940 is 0.9 from the mean and 0.1 from the first standard deviation
so above it is 17.5 % = 0.175 or about 0.18 </span>
4 0
2 years ago
A population of 130,000 grows 4% per year for 16 years.
alexgriva [62]

Let's consider the scenario after each year:

After the zeroth year, the population is: 120 000(1 + 0.04)⁰

After the first year, the population is: 120 000(1 + 0.04)¹

After the second year, the population is: 120 000(1 + 0.04)²

...

Thus, we can find the general rule:

After the nth year, the population is: 120 000(1 + 0.04)ⁿ

And after the 16th year, the population is 120 000(1 + 0.04)¹⁶ = 224 758 (rounded to nearest whole number)

6 0
3 years ago
11 3/4-7 1/4 evaluate answer need asap
Debora [2.8K]

Answer:

−6

Step-by-step explanation:

8 0
3 years ago
The circumference of a fountain is 63 feet. What is the approximate diameter?
Alik [6]

Answer:

Approximantly 20

Step-by-step explanation:

Circumference = pi times diameter

63/pi = diameter

Answer: 20.0535228

3 0
3 years ago
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