The heights of a random sample of 100 women are recorded. the sample mean is 65.3 inches and the sample standard deviation is 3 inches. whicho of the following is an approximate 95% confidence interval for the population mean? a. 65.3 + (2)(0.03)b. 65.3 + ()c. 65.3 + (2)(3)d. 65.3 + (2)(30)

B.

Step-by-step explanation:

The confidence interval for the population mean is given by :-

Given : Sample size : n= 100

Sample mean :

Standard deviation:

Level of confidence = 0.95

Significance level :

Critical value :

Then, 95% confidence interval for the population mean will be :-

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

: )

answer: the answer is one

step-by-step explanation:

pemdas, in this situation there is no parenthesis or exponents so you go to multiplication, 1x1=1, then division 1/1= 1 then addition 1+1=2 then subtraction 2-1=1