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aleksley [76]
3 years ago
13

If Professor Wilson found that the test scores of his students had a variance of 4.4, what is the standard deviation? Type a num

erical answer in the space provided. Round your answer to the nearest tenth.
Mathematics
1 answer:
malfutka [58]3 years ago
8 0

Answer:

The standard deviation will be: 2.1        

Step-by-step explanation:

We know that standard deviation is basically the square root of variance.

Using the formula to calculate the standard deviation

s=\sqrt{s^2}

As

  • The variance =  s² = 4.4

so the standard deviation can be calculated as:

standard deviation =\sqrt{s^2}

                                 =\sqrt{\left(4.4\right)^}

                                  =2.1

Therefore, the standard deviation will be: 2.1                      

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A bag contains 40 marbles. The probability of selecting a red marble at random is 1/5. How many red marbles are in the bag?
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8 red marbles.

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If each group has 1 red marble in it and we have 8 groups, it means that we have 8 red marbles in the bag.

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If the numerator (number above the fraction line) was more than one, then this would mean that we have more than 1 marble in each group of marbles.

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