Two studies were completed in california. one study in northern california involved 1,000 patients; 74% of them experienced flulike symptoms during the month of december. the other study, in southern california, involved 500 patients; 34% of them experienced flulike symptoms during the same month. which study has the smallest margin of error for a 98% confidence interval?

the northern california study with a margin of error of 3.2%.
the southern california study with a margin of error of 3.2%.
the northern california study with a margin of error of 4.9%.
the southern california study with a margin of error of 4.9%.

The northern California study with a margin of error of 3.2%.

Step-by-step explanation:

The formula for margin of error for proportion is given by :-

Given : Significance level :

Critical value :

For northern California , the sample size was takes : n= 1000

The proportion of patients  experienced flu like symptoms during the month of December = 0.74

Then , the margin of error will be :-

For southern California , the sample size was takes : n= 500

The proportion of patients  experienced flu like symptoms during the month of December = 0.34

Then , the margin of error will be :-

Clearly, the northern California study with a margin of error of 3.2%  has the smallest margin of error for a 98% confidence interval.

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.