Answer:
15
Step-by-step explanation:
Answer:
Atleast 315
Step-by-step explanation:
Given that a journalist wants to determine the average annual salary of CEOs in the S&P 1,500. To save time a sample is taken.
s = sample std dev = 449300
Sample size = n
Margin of error = 50000
Z critical = 1.96
Hence 1.96*std error = 50000
std error = 25510.20
Std deviation/sqrt n = 25510.20
Simplify to get
So sample size should be atleast 315
We have 3 children, with each one possibly being a boy or a girl. And so for each child, the probability of being a boy is 1/2 same with a girl so
1/2^3 = 1/8
so it's 1/8 chance of it being a boy.
Answer:
40.4%
Explanation:
if n is the starting population of india in 1989,
1989 - 1999: the population increases by 20%. n × 120% = 1.2n
1999 - 2009: the population increases by another 17%. 1.2n × 117% = 1.404n
thus, the population increased from n to 1.404n, which is an increase of 0.404n.
0.404 = 40.4%. the percentage by which the population of india increased is 40.4%.
sorry, i'm not too sure if my answer is correct, but i hope this helps! :D
