7.3 Sampling Distribution of the Proportion 231 c. The probability is 95% that the sample percentage of companies that have three or more female board directors will be contained within what...

7.17a and b please. Thx Also PH stat

Extracted text: 7.3 Sampling Distribution of the Proportion 231 c. The probability is 95% that the sample percentage of companies that have three or more female board directors will be contained within what symmetrical limits of the population percentage? y a 7.17 The Chartered Financial Analyst (CFA) Institute reported that 63% of its U.S. members indicate that lack of ethical cul- ture within financial firms has contributed the most to the lack of trust in the financial industry. (Data extracted from Global Market Sentiment Survey 2014, cfa.is/1dzvdF8.) Suppose that you select a sample of 100 CFA members. a. What is the probability that the sample percentage indicating that lack of ethical culture within financial firms has contrib- uted the most to the lack of trust in the financial industry will be between 62% and 67%? b. The probability is 90% that the sample percentage will be Acontained within what symmetrical limits of the population percentage? c. The probability is 95% that the sample percentage will be contained within what symmetrical limits of the population percentage? d. Suppose you selected a sample of 400 CFA members. How does this change your answers in (a) through (c)? 7.18 An IAB study on the state of original digital video showed that original digital video is becoming increasingly popular. Original digital video is defined as professionally produced video intended only for ad-supported online distribution and viewing. According to IAB data, 30% of American adults 18 or older watch original digital videos each month. (Data extracted from (AR Original Digital Vidao