×
Get Full Access to Elementary Statistics - 12 Edition - Chapter 5.4 - Problem 1bsc
Get Full Access to Elementary Statistics - 12 Edition - Chapter 5.4 - Problem 1bsc

×

# Notation In a clinical trial of the cholesterol drug ISBN: 9780321836960 18

## Solution for problem 1BSC Chapter 5.4

Elementary Statistics | 12th Edition

• Textbook Solutions
• 2901 Step-by-step solutions solved by professors and subject experts
• Get 24/7 help from StudySoup virtual teaching assistants Elementary Statistics | 12th Edition

4 5 1 341 Reviews
22
2
Problem 1BSC

Problem 1BSC

Notation In a clinical trial of the cholesterol drug Lipitor, 270 subjects were given a placebo, and 7% of them developed headaches. For such randomly selected groups of 270 subjects given a placebo, identify the values of n, p, and q that would be used for finding the mean and standard deviation for the number of subjects who develop headaches.

Step-by-Step Solution:
Step 1 of 3

Problem 1BSC

Step1 of 2:

We have In a clinical trial of the cholesterol drug Lipitor, 270 subjects were given a placebo, and 7% of them developed headaches. For such randomly selected groups of 270 subjects given a placebo,we need to identify the values of n, p, and q that would be used for finding the mean and standard deviation for the number of subjects who develop headaches.

Consider a random variable “x” follows binomial distribution with sample size “n” and proportion “p”.

i,e.X B(n, p)

Where,

n = 270 and p = 0.07.

q = 1 - p

= 1 - 0.07.

= 0.93

Probability mass function of binomial distribution is given by

P(x) = , x = 0,1,2,...,n.

With mean E(x) = np and variance var(x) = npq

Consider,

E(x) = np

= 270 0.07

= 18.9

Therefore,E(x) = 18.9

var(x) = npq

= 270 0.07 0.93

= 17.577

Step2 of 2:

Standard deviation is given by = = = 4.1924. 4 people.

Step 2 of 3

Step 3 of 3

##### ISBN: 9780321836960

Since the solution to 1BSC from 5.4 chapter was answered, more than 537 students have viewed the full step-by-step answer. The answer to “Notation In a clinical trial of the cholesterol drug Lipitor, 270 subjects were given a placebo, and 7% of them developed headaches. For such randomly selected groups of 270 subjects given a placebo, identify the values of n, p, and q that would be used for finding the mean and standard deviation for the number of subjects who develop headaches.” is broken down into a number of easy to follow steps, and 60 words. This full solution covers the following key subjects: subjects, placebo, given, headaches, lipitor. This expansive textbook survival guide covers 121 chapters, and 3629 solutions. The full step-by-step solution to problem: 1BSC from chapter: 5.4 was answered by , our top Statistics solution expert on 03/15/17, 10:30PM. This textbook survival guide was created for the textbook: Elementary Statistics, edition: 12. Elementary Statistics was written by and is associated to the ISBN: 9780321836960.

Unlock Textbook Solution