• 0
Votes
name

A PHP Error was encountered

Severity: Notice

Message: Undefined index: userid

Filename: views/question.php

Line Number: 212

Backtrace:

File: /home/mycocrkc/statisticsanswered.com/application/views/question.php
Line: 212
Function: _error_handler

File: /home/mycocrkc/statisticsanswered.com/application/controllers/Questions.php
Line: 416
Function: view

File: /home/mycocrkc/statisticsanswered.com/index.php
Line: 315
Function: require_once

Recent research indicated that about 30​% of children in a certain country are deficient in vitamin D. A company that sells vitamin D supplements tests 370 elementary school children in one area of the country. Use a Normal approximation to find the probability that no more than 99 of them have vitamin D deficiency.

Calculate the standard deviation and the mean of the distribution using the n*p and the n*p*q formulas. 

mean = 0.3 * 370 =  111 and the standard deviation is  = sqrt(0.3 * 0.7 * 3670)  =  8.815

Then apply the standard normal distribution function, =NORM.DIST(99,B2,B3,TRUE) = 

  • 1
Reply Report