Question

a. all Hypothesis Tests must include all four steps, clearly labeled;

b. all Confidence Intervals must include all output as well as the CI itself

c. include which calculator function you used for each problem.

3. At a community college, the mathematics department has been experimenting with four different delivery mechanisms for content in their Statistics courses. One method is traditional lecture (Method I), the second is a hybrid format in which half the time is spent online and half is spent in-class (Method II), the third is online (Method III), and the fourth is an emporium model from which students obtain their lectures and do their work in a lab with an instructor available for assistance (Method IV). To assess the effective of the four methods, students in each approach are given a final exam with the results shown in the following table. Assume an approximate normal distribution for each method. At the 5% significance level, does the data suggest that any method has a different mean score from the others?

Method I	81	81	85	67	88	72	80	63	62	92	82	49	69	66	74	80
Method II	85	53	80	75	64	39	60	61	83	66	75	66	90	93
Method III	81	59	70	70	64	78	75	80	52	45	87	85	79
Method IV	86	90	81	61	84	72	56	68	82	98	79	74	82

Answer 1

Data

Ho: µ1 = µ2= µ3 = µ4

Ha: at least one mean is different

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