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kolezko [41]
2 years ago
8

The lengths of a certain species of fish are approximately normally distributed with a given mean and standard deviation. Accord

ing to the Empirical Rule, what percentage of the fish will have lengths within 1 standard deviation of the mean?
a) 34%
b) 47.5%
c) 68%
d) 99.7%
Mathematics
2 answers:
umka21 [38]2 years ago
5 0

Answer:

c) 68%

Step-by-step explanation:

The empirical rule states that most of the data will be within three standard deviations in a normal distribution. The 68% of the data will be within one standard deviation, the 95% will be within two standard deviations, and 99.7% of the data will be within three standard deviations.

A normal distribution is a continuous distribution in which values around the mean are the most frequents. It can also be called a bell-shaped distribution.

RSB [31]2 years ago
3 0

Answer:

c.) 68%

Step-by-step explanation:

jut took test on ed

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The third term in an arithmetic sequence is 14 and the fifth term is 20. If the first term is a1, which is an equation for the n
Kruka [31]

Answer:

The equation for nth term is 3n + 5.

Step-by-step explanation:

Let a1 be a,

a3 = a + (n - 1)d

or, 14 = a + (3 - 1)d

so, 14 = a + 2d

Now,

a5 = a + (n - 1)d

or, 20 = a + (5 - 1)d

or, 20 = a + 4d

now,

a + 4d = 20

a + 2d = 14

now,

a + 4d - ( a + 2d) = 20 - 14

or, a + 4d - a - 2d = 6

or, 2d = 6

so, d = 3

Now,

a + 2d = 14

or, a + 2(3) = 14

or, a = 14 - 6

so, a = 8

Now,

an = a + (n - 1)d

or, an = 8 + (n - 1)3

or, an = 8 + 3n - 3

so, an = 3n + 5

5 0
2 years ago
George drew a picture of a helmet, as shown below.
gulaghasi [49]

answer

c

Step-by-step explanation:

because, u add them and then divide by 3 and that is ur answer

8 0
3 years ago
The vehicle preference of police officers and firefighters is given in the table.
Arisa [49]

Based on the information in the table, an example of independent events is  the: P(policer officer and chooses car).

<h3>What is an independent event?</h3>

An independent event can be defined as an event that isn't dependent on other events. Thus, it isn't affected by any previous event.

Based on the information provided, we can infer and logically deduce that an example of independent events is  the probability of being a policer officer and chooses a car because they aren't overlapping probabilities.

Read more on independent events here: brainly.com/question/26795996

#SPJ1

8 0
1 year ago
i have a stem and leaf plot stem numbers 14,15,16 leaf side starting at first row 002 row2 55 row3 0 what is the amount of time
jok3333 [9.3K]
2 x 3 = 6

55 + 6 = 61

It's probably a 2-step problem

to multiply and add
5 0
3 years ago
Absolute value of -93​
Elodia [21]
The absolute value will be the positive version of the number
absolute value of -93 will be 93
4 0
2 years ago
Read 2 more answers
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