Answer: a) 683 b) 1067
Step-by-step explanation:
The confidence interval for population proportion is given by :-
a) Given : Significance level :
Critical value :
Margin of error :
Formula to calculate the sample size needed for interval estimate of population proportion :-
Hence, the required sample size would be 683 .
b) If no estimate of the sample proportion is available then the formula to calculate sample size will be :-
Hence, the required sample size would be 1067 .
A would be your answer.
(I am going to assume that the set of numbers are multiplied by exponents.)
To solve you just need to calculate each one. Note that for positive exponents you move the decimal point to the right and negative exponents you move the decimal point to the left.
The first scientific notation would be equal to 2700 because you move the decimal point 3 places to the right, since the exponent is positive.
The second scientific notation would be equal to 0.00424 because you move the decimal point 3 places to the left, since the exponent is negative.
The third scientific notation would equal 470 because you move the decimal point 2 places to the right, since the exponent is positive.
The last scientific notation would equal 0.043 because you move the decimal point 2 places to the left, since the exponent is negative.