A sociologists has obtained a random sample of 50 males and 30 females. It is found that the average hourly wage for females is $19 per hour with a sample standard deviation of $7 per hour and for men it is $21.75 per hour with a sample standard deviation of $5 per hour. The researcher wishes to construct a 95% confidence interval for the average difference of average male hourly wage - average female hourly wage. Select all answers that apply.
(3.53, 9.03)
(-0.17 , 5.67)
(4.26,1.23)
(4.36,-.88)