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3 years ago

10

how many 7th grade students are expected to move by the end of the year? if 12 students actually moved, did more or fewer 7th gr

ade students move than expected? justify your answer.

1 answer:

igomit [66]3 years ago

5 0

Less because is 12-7 equals 5 it’s less

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An adult can lose or gain two pounds of water in the course of a day. Assume that the changes in water weight are uniformly dist

Levart [38]

Answer:

Standard deviation of the weight over a day is 1.15

Step-by-step explanation:

Since it is given that water weight is uniformly distributed between -2 to 2.

So applying formula for variance of uniformly distribution as follows,

$variance=\dfrac{\left (b-a\right )^{2}}{12}$

From the given data, values of a and b is , $a=-2$ , $b=2$ ..

Substituting the values,

$variance=\dfrac{\left (2-\left (-2 \right )\right )^{2}}{12}$

Now, $-\left ( -2 \right )=2$

$variance=\dfrac{\left (2+2\right )^{2}}{12}$

$variance=\dfrac{\left (4\right )^{2}}{12}$

$variance=\dfrac{16}{12}$

Dividing the fraction by 4,

$variance=\dfrac{4}{3}$

So, the value of variance is $\dfrac{4}{3}$

The formula for standard deviation is given as,

$Standard\:deviation=\sqrt{variance}$

Substituting the value,

$Standard\:deviation=\sqrt{\dfrac{4}{3}}$

$Standard\:deviation=1.15470$

Rounding to 2 decimal places,

$Standard\:deviation=1.15$

So, the value of standard deviation is 1.15.

4 0

3 years ago

Read 2 more answers

40 multiply 10=4 multiple

leva [86]

40 the answer i think

6 0

3 years ago

The weight of oranges growing in an orchard is normally distributed with a mean weight of 3.5 oz. and a standard deviation of 0.

Andreas93 [3]

Answer:

(3 oz ; 4oz)

Step-by-step explanation:

Given that :

Mean = 3.5 oz

Standard deviation = 0.5 oz

According to the empirical rule ; 68% is 1 standard deviation from the mean.

Hence, the interval that would represent the middle 68% will be:

(3.5 oz - 0.5 oz) ; (3.5 oz + 0.5oz)

(3 oz ; 4oz)

7 0

3 years ago

Can someone please help me it’s just 5 questions not much and I’m not asking a lot please and thank you

Dmitriy789 [7]

Answer:

I can only see 2 questions.

Step-by-step explanation:

7 0

3 years ago

4x4=(blank)+(blank)=blank

kari74 [83]

Answer:

i think it would be 4x4=8+8=16

4 0

3 years ago