6) The paralyzed Veterans of America is a philanthropic organization that relies on contributions. They send free mailing labels and greeting cards to potential donors on their list and ask for voluntary contribution. To test a new campaign, they recently sent letters to a random sample of 7,679 potential donors and received 3268 donations. a) Let p be the proportion of all donors that say they have contributed to the new campaign. Find a point estimate for p. b) Find 95% condence interval for population proportion. Interpret the results. 7) A random sample of 25 married women showed that the mean time spent on housework by them was 25 .1\" hours a week with a standard deviation of 4.7 hours. Find a 98% condence interval for the mean time spent on housework per week by all married women. Interpret the results