Question

Medals!!! Need more help...kindergarten children have normally distributed heights with a mean of 39 inches and a standard deviation of 2 inches. what is the probability that a randomly chosen kindergarten child will have a height between 37 and 41 inches?

Answer 1

well, since they are both 1 deviation from the mean ...

Answer 2

what does the empirical rule tell us?

Answer 3

more hints : 68-95-99.7

Answer 4

about 68% lies within 1 SD

Answer 5

of the mean

Answer 6

+- 1 sd of the mean tha tis

Answer 7

since 39 + 1sd = 41

and 39 - 1sd = 37

we are +-1 sd of the mean

Answer 8

\[P\left( 37 < X < 41 \right)=\]\[P\left( \frac{37-39}{2} < \frac{X-39}{2} < \frac{41-39}{2} \right)=P\left( -1 < Z < 1 \right)=\]

Answer 9

0.6826

Answer 10

I really have no idea what I am doing

Answer 11

do you know how to find the area underneath a curve?

Answer 12

i see it in my book and try to work it out however i never end up getting the right answers. i have gone to almost every website.

Answer 13

this is my last assignment for class, thankfully.

Answer 14

the tables in a book are the calculations tha tpeople made a long time ago so that they would not have to do the calculus everytime they wanted to determine a value. instead of repeating the same thing over and over again, they just listed the values of greatest importance and looked it up when they needed it

Answer 15

a normal curve is one that is high in the middle and skinny at the ends ... visually

the total area under the curve is equal to 1, the area between any interval is equal to the probability of being in that interval