Ask question

Ask question

All categories

3 years ago

5

A group of 625 students has a mean age of 15.8 years with a standard deviation of 0.6 years. The ages are normally distributed.

How many students are younger than 16.2 years? Express answer to the nearest student.

1 answer:

Tom [10]3 years ago

7 0

16.2-15.8/0.6=0.6667. Use normalcdf() to find the percentage from -999 to 0.6777 which is 0.7476*625=467

You might be interested in

What is the volume of the rectangular prism?

11Alexandr11 [23.1K]

The volume is 288

because V = w h l = 6•4•12 = 288

8 0

3 years ago

What is y=\dfrac{2}{3}x+4y=

lara [203]

Answer:

$12y+x-12=0$

Step-by-step explanation:

If I'm not mistaken by the question, we have

$x+4y=\dfrac{2}{3}x+4$

Multiply through by the LCM of all the denominators to clear the fractions. Since we have only one fraction, we multiply through by its LCM (3)

$3\timesx+3\times4y=3\times\dfrac{2}{3}x+3\times4$

$3x+12y=2x+12$

Putting all terms on the LHS (left hand side) and evaluating,

$12y+x-12=0$

5 0

3 years ago

A package of cookies, packed , ate the fourth part at breakfast , then 3/5 at tea time. there are still 18 cookies in the pakage

Leno4ka [110]

Ok so
1/4 of total eaten
3/4 left
3/5 of 3/4 eaten
9/20 left
18=9/20 of whole
multiply both sides by 20
360=9 of whole
divide both sides by 9
40=whole

40 total originlly

5 0

3 years ago

Read 2 more answers

EleoNora [17]

I can’t see the picture

6 0

3 years ago

The quotient of 20 and t ?

rosijanka [135]

the answer is $\frac{20}{t}$

5 0

3 years ago

Read 2 more answers