Question

iready math book grade 7 Norah lives in minnesota .He records the lowest temperature each day for one week what is the mean of the temperature? -7.3°f, -11.2°f, 2.2°f, 0°f, -1.7°f, 3.3°f, 0°f

Answer 1

Answer:

Step-by-step explanation:

Let us first make the tally of temperature in Minnesota :-

-7.3°F    -11.2°F   2.2°F  0°F  -1.7°F  3.3°F  0°F

Now, what does a mean say to us?

$\sf{Mean = \dfrac{Sum \ of \ Observations}{Number \ of \ Observations}}$

So, we need to sum up the temperatures, keeping in mind about the (-) sign also.

$\rm{\dfrac{-7.3+(-11.2)+2.2+0+(-1.7)+3.3+0}{7}}$

$\rm{\dfrac{-7.3+(-11.2)+2.2+0+(-1.7)+3.3+0}{7}}$

$\rm{\dfrac{-14.7}{7}}$

So, the mean of the temperature is approximately -2.1°F.

The only formula that you need to remember is :-

$\sf{Mean = \dfrac{Sum \ of \ Observations}{Number \ of \ Observations}}$

Answer 2

Answer:

Given :-

He records the lowest temperature each day for one week

-7.3°f, -11.2°f, 2.2°f, 0°f, -1.7°f, 3.3°f, 0°f

To Find :-

Mean

Solution :-

Mean = -7.3 +(-11.2) + 2.2 + 0 + (-1.7) + 3.3 + 0/7

Mean = -7.3 - 11.2 + 2.2 - 1.7 + 3.3/7

Mean = -20.2 + 5.5/7

Mean = -14.7/7

Mean = -2.1⁰ F