Conclusion of the new mean

Reference no: EM1318318

A typing instructor wondered whether a new method of instruction would result in a change in the mean typing speed of students. The old method produced a mean of 64 words per minute. The results (words per minute) for 38 students using the new method were as follows:

56	60	60	76	60	59	41	66	67	33	55	43	61
71	73	60	56	77	43	58	65	67	71	56	48	90
82	46	68	36	27	52	64	54	49	69	46	68

Note that Σx = 2233 and Σx² = 138,053. At the 5% level of significance, can the instructor conclude that the new mean is different from 64?

Reference no: EM1318318

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