laurencoan laurencoan

21-10-2014
Mathematics

Answered

the heights, x cm, of the 10 girls in an athletics team are such that
sum of x (∈x) =1550 and ∈x∧2= 241250

a- find the mean and variance
b- one girl, who is 173cm tall, drops out of the tem. calculate the mean and variance of the heights of the remaining nine members of the team

Answer :

Gwenuin Gwenuin

21-10-2014

use the standard deviation equation attached to work this one out. They have given you totalX^2 and sum of X and n, just substitute and work through.

View image Gwenuin

Answer Link

Other Questions

3. ¿Cuántos gramos de ácido acético (CH3COOH) se encuentran presentes en 473 mL de una Muestra de vinagre comercial cuya concentración es de

Format the following question or task so that it is easier to read.Fix any grammar or spelling errors.Remove phrases that are not part of the question.Do not re

What structures make up the renal hilum? A. Ureter B. Renal duct C. Renal pelvis D. Renal artery E. Nephrons F. Renal vein

(g) Define Scanner and write one of its uses.(h) If a body starts from rest and attains a velocity of [tex]20 \, \text{m/s}[/tex], what distance does it cover i

In a structured program, any structure can be nested within another structure. a. Trueb. False

Which of the following expressions is equal to [tex]\(\frac{1}{16}\)[/tex]?A. [tex]\(\left(\frac{1}{8}\right)^2\)[/tex]B. [tex]\(\left(\frac{1}{4}\right)^4\)[/t

Select all the correct answers.What can significantly reduce the chances of getting infected with HIV?A. Having multiple sexual partnersB. Abstaining from sexC.

What nutritional concern arises when children start drinking cow’s milk?A. Iron deficiencyB. Vitamin C deficiencyC. Calcium overloadD. Lactose intolerance

What is senescence?A. Hypertorphy of muscles in reponse to exercise. B. A change that occurs at the time of birth C. A congenital disease due to aneuploidy D. D

What is the equation of a line parallel to the line [tex]y = \frac{4}{3}x - 16[/tex] that goes through the point [tex](-12, 0)[/tex]?A. [tex]y = \frac{4}{3}x -

how did mountains hinder westward travel

The atomic mass of an element is 32.07 u and its atomic number is 16. The element forms a simple ion. The ion will most likely have a charge of (A) 1– (B) 2–

what were the ideals of the Renaissance and how did Italian artist and writers reflect these ideals

49.5 is what percent of 33?

what makes volcanoes violent?

which one of the following sentences contains a predicate adjective? A. I bought my lunch for the first tim this year. B. The teacher appeared angry when Dave

Jessica is making 2 loaves of banana bread. She needs 3/4 cup of sugar for each loaf. Her measuring cup can only hold 1/4 cup of sugar. How many times will Jess

Mathilde has 20 pints of green paint. She uses 2/5 of it to paint a landscape and 3\10 of it while painting a clover. She decides that for her next painting s

jack, jill and bill each carried a 48-ounce bucket full of water down the hill. By the time they reached the bottom, jack's bucket was only 3/4 full, jill's wa

what were the ideals of the Renaissance and how did Italian artist and writers reflect these ideals