4. A random sample of 10 men in New Jersey and 10 men in Arizona revealed the following average heights and standard deviations for the two samples. Assume that height is normally distributed and that the population variances are equal. mm 177 4 176. 2 _I-_ __ 3) Find a 99% condence interval for the difference in mean male height between the two states, "If! #u- Choose the alternative closest to your answer. (5p) (A) (-3.44, 5.84) (B) (-3.91, 6.31) (C) (-4.67, 7.07) (D) (-5.36, 7.76) (E) (-6.02, 3.42) In a survey of 1000 randomly selected British adults, 445 answered that they have given money to charitable organizations in the past 12 months. 13) Assuming that the sample is representative of the whole population, MW grrgr for the proportion of British adults who have given money to charitable organizations in the past 12 months. Use a 95% condence interval. Choose the alternative closest to your answer. (5p) (A) 1.6% (B) 2.1% (C) 3.1% (D) 5.3% (E) 6.2%