(Using R)Consider a hardness testing machine that presses a rod with a pointed tip into a...

(Using R)Consider a hardness testing machine that presses a rod with a pointed tip into a metal specimen with a known force. By measuring the depth of the depression caused by the tip the hardness of the specimen is determined. Four tips and four test coupon are available and following data are observed

	Coupon
Tip	1	2	3	4
1	9.3	9.4	9.6	10.0
2	9.4	9.3	9.8	9.9
3	9.2	9.4	9.5	9.7
4	9.7	9.6	10.0	10.2

Analyze the data from this experiment
Perform a test to make comparisons among the four tips to determine speciﬁcally which tips diﬀer in mean hardness readings.

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orchestra answered 1 year ago

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