Thirty-five people from a random sample of 125 workers from Company A admitted to using sick leave when they weren’t really ill. Seventeen employees from a random sample of 68 workers from Company B admitted that they had used sick leave when they weren’t ill. A 95% confidence interval for the difference in the proportions of workers at the two companies who would admit to using sick leave when they weren’t ill is

(a) 0.03 ±

Å

(0.28)(0.72)

125

+

(0.25)(0.75)

68

(b) 0.03 ± 1.96

Å

(0.28)(0.72)

125

+

(0.25)(0.75)

68

(c) 0.03 ± 1.645

Å

(0.28)(0.72)

125

+

(0.25)(0.75)

68

(d) 0.03 ± 1.96

Å

(0.269)(0.731)

125

+

(0.269)(0.731)

68

(e) 0.03 ± 1.645

Å

(0.269)(0.731)

125

+

(0.269)(0.731)

68