1. Can we use the large-sample con?dence interval? In each of the following circumstances state whether you would use the large-sample con?dence interval.

(a) n = 50, X = 30.

(b) n = 90, X = 15.

(c) n = 10, X = 2.

(d) n = 60, X = 50.

(e) n = 25, X = 15.

2. More on whether to use the large-sample con?dence interval. In each of the following circumstances state whether you would use the large-sample con?dence interval.

(a) n = 8, X = 4.

(b) n = 500, X = 13. (c)  n = 40, X = 18.

(d) n = 15, X = 15.

(e) n = 50, X = 22.