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mylen [45]
2 years ago
13

What is formula for Standard Deviation (σ)

Mathematics
2 answers:
Phoenix [80]2 years ago
7 0

Answer:

sd =  \sqrt{ \frac{ fx {}^{2} }{f} - ( \frac{fx}{f}) {}^{2}   }

Scrat [10]2 years ago
7 0

Answer:

What is formula for Standard Deviation (σ)

In Individual series

☙\huge \mathfrak{\pink{ \fbox{ \green{S.D}}}}

Step-by-step explanation:

<h2> formula of Standard Deviation </h2>
<h3>[ σ= nx²−( nx ²) / n ]</h3>

hope it's helpful thanks

<h3> </h3>

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Carlos drank 2740 mL of water after football practice. How many liters did he drink
Bas_tet [7]
2740/1000= 2.74

So the answer is 2.74 Liters
4 0
3 years ago
Read 2 more answers
Help me with both of these answers please
kiruha [24]

Answer:

Step-by-step explanation:

Proportional.

y = 9x

The constant is 9

8 0
3 years ago
What does k equal if <br>485= 1/((k)(5.99x10^-3))
Verizon [17]
k\ne 0

485=\frac{1}{(k)(5.99*10^{-3})}\\\\ \frac{485}{1}= \frac{1}{0.00599k}\\\\ 485*0.00599k=1\\\\ k=\frac{1}{485*0.00599}\\\\k\approx 0.3442
7 0
3 years ago
The weekly salaries (in dollars) for
kompoz [17]

Answer:

a) Median stays the same

b) Mean is decreased by $9

Step-by-step explanation:

The median is the number or the average of the two numbers that is in the middle of a sorted distribution of numbers,

Here the median number will be the 5th number counting from left or right from the sorted list of numbers. Therefor is is 891.

When 1027 is changed to 946 it will fall between 938 and 1002. So updated sorted list of numbers will now look like,

679, 715, 799, 844, 891, 917, 938, 946, 1002

Here also median will be the 5th number which will be equal to 891.

Therefore, , median will not change.

Mean is the value we get by taking the total value of the salaries and divide it by the number of employees.

In the initial case,

Mean =\frac{679+715+799+844+891+917+938+1002+1027}{9} =868

When the salary is changed from $1027 to $946,

Mean=\frac{679+715+799+844+891+917+938+1002+946}{9} =859

Therefor we can see that Mean has decreased by $9.


8 0
3 years ago
Preston writes 3 songs in 2 days, working 7 hours each day. He spends the same amount of time on each song. How long does he spe
Alekssandra [29.7K]

Answer:

Step-by-step explanation:

In 2 days he spends 2*7 = 14 hours total

He divides the number of hours on each song evenly

14 /3 = 4 2/3 hours on each song.

What is 2/3 of an hour?

2/3 * 60 = 120 / 3 = 40 minutes

Total time spent on each song 4 hours and 40 minutes

5 0
2 years ago
Read 2 more answers
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