For each of the situations in parts a) through d), define the parameter (proportion or mean) and write the null and alternative hypotheses in terms of parameter values. Example: We want to know if the proportion of up days in the stock market is 50%. Answer: Let p = the proportion of up days. Ho: p =0.5 vs. HA: P #0.5. . . . a) A casino wants to know if their slot machine really delivers the 1 in 100 win rate that it claims. Let = the of wins in the casino's slot machine. Ho 0.01 vs. HA: 0.01 b) Last year, customers spent an average of $34.57 per visit to the company's website. Based on a random sample of purchases this year, the company wants to know if the mean this year has changed. Let = the of customer spending per visit to the website. Ho 34.57 vs. HA 34.57c) A pharmaceutical company wonders if their new drug has a cure rate greater than the 30% reported by the placebo. Let = the of patients cured by the new drug. Ho 0.30 vs. HA: 0.30 d) A bank wants to know if the percentage of customers using their website has decreased from the 20% that used it before their system crashed last week. Let = the of customers using the bank website. Ho 0.20 vs. HA 0.20