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Korvikt [17]
3 years ago
7

Which of the following choices is the standard deviation of the sample shown

Mathematics
1 answer:
frozen [14]3 years ago
7 0

Answer:

Mean = (19 + 20 + 21 + 22 + 23)/5 = 105/5 = 21

x    x - mean   (x - mean)^2

19     -2                4

20     -1                1

21      0                0

22      1                1

23      2                4

              Sum = 10

Step-by-step explanation:

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Find the percent of change. Round to the nearest tenth if necessary: 25 is increased by 80%
AleksAgata [21]

Answer:

45

Step-by-step explanation: Find what 80% of 25 is, you can do this by dividing 25 by 100. Then multiply the output by 80. Add that output to 25 and you should get an answer of 45.

6 0
2 years ago
Sarah is making strings of beads in the first string she uses 3 beads and she triples the number of beads in each of the next st
xenn [34]

Answer:

She uses 243 beads for the 5th string.

Step-by-step explanation:

In this problem, we can see a pattern. If she triples the number of beads in each of the next strings, that means that we just take the last number and multiply by 3. If the first string uses 3, then:

The second uses 9, 3 * 3 = 9

The third uses 27, 9 * 3 = 27

The fourth uses 81, 27 * 3 = 81

And the 5th uses 243, 81 * 3 = 243.

6 0
3 years ago
Help is needed asap​
Wewaii [24]

Answer:

3.8

Step-by-step explanation:

3(-7.9)-5(-5.5)

3.8

Hope this helps!

6 0
3 years ago
Read 2 more answers
Mean of 6 numbers-is 15 whereas mean of next 4 numbers
Assoli18 [71]
It is 22 my guy because i think it is 22
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3 years ago
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What is 0.9 3 4 5 / 0 15 what is 0.345 / 0 15
DaniilM [7]

Answer:

the answer is 2.5

Step-by-step explanation:


5 0
3 years ago
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