Question

Coffee beans from around the world are used to make coffee. Do coffee tasters prefer coffee beans from particular countries? To investigate this question, a researcher collected coffee aroma ratings based on Arabica coffee beans from two countries, Brazil and Costa Rica. The coffee aroma ratings are summarized in the table below. Each sample contains 10 coffee bean ratings. Sample Standard Deviation n Sample Mean Costa Rica 7.74 0.26 10 10 Brazil 7.54 0.25 We will assume that the aroma ratings of coffees from these two countries are normally distributed. Let's perform a hypothesis test at the 5% significance level. Test that the mean aroma rating of coffee made from Costa Rican coffee beans is greater than the mean aroma rating of coffee made from Brazilian coffee beans. Let uy be the mean aroma rating of coffee made from Costa Rican coffee beans. And let uz be the mean aroma rating of coffee made from Brazilian coffee beans. Select the null and alternative hypotheses. O Ho: My = 2 Ha: 1+ H2 O Ho: M1 M2 Ha: Pi<H2 O Ho: M1 = H2 Ha: Hi > U2 O Ho: H1 H2 Ha: H1 = 42

Answer 1

we have to perform test that mean aroma rating of cofee made from Costa Richan coffee beans is greater than Brazillian cofee beans. Miramean aroma nating cofea from Costa Richa, 425 mean aroma nating cofee from Brazil our claim should be in alternative hypothesis .: Answer is, Hor Mirala VIS HiiM742 2