PROBLEM 2(25pts) In an effort to determine the quality of two potential manufacturing companies, ...
A blind taste test is conducted to determine which of two colas, Brand A or Brand B, individuals prefer. Individuals are randomly asked to drink one of the two types of cola first, followed by the other cola, and then asked to disclose the drink they prefer. Results of the taste test indicate that 59 of 100 individuals prefer Brand A. Complete parts a through c. (a) Conduct a hypothesis test (preferably using technology) HO. p-p0 versus HI : pf...
PROBLEM 1(35pts) You are charged with conducting an investigation in relation to herbicide pollution of IA lakes. Let X denote the act of measuring the level of a certain chemical in any randomly chosen lake. Assume X N(Hr,ax), and that the lakes to be chosen for testing are such that the data collection variables {X^)% can be assumed mutually independent. Let(ux x ) denote the usual estimators of (Ax O,) Data collected on n-50 lakes resulted in (Ax-323. Ở,-69) (a)(12pts)...
2. Testing two population means using Excel Aa Aa Consider two independent random variables x and y. The variable x follows a normal distribution with an unknown population mean ux and a unknown standard deviation of ox. The variable y also follows a normal distribution with an unknown population mean py and a unknown standard deviation of oy. Independent random samples are drawn from each population To answer the questions that follow, download an Excel spreadsheet containing observed values of...
while her husband spent 2 ½ hours picking out new speakers, a statistician decided to determine whether the percent of men who enjoy shopping for electronic equipment is higher than the percent of women who enjoy shopping for electronic equipment. The population was Saturday afternoon shoppers. Out of 69 men, 25 said they enjoyed the activity. 7 of the 22 women surveyed claimed to enjoy the activity. Interpret the results of the survey. Conduct a hypothesis test at the 5%...