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The average weight of all babies from women receiving regular care during pregnancy in the region of the study was 3.40 kg. (treat this as if it is the population value). You are asked to conduct a test to see if the sample mean from the mothers given vitamin supplements is different from the regional average of 3.40. Use alpha = .05.  The critical value(s) for this test is/are:

a. 1.740

b. 1.746

c. -1.746 and 1.746

d. 2.120

StemLeafMean3.7612147Median3.7302*54Variance0.5313 02 22 39 43Std Dev0.7293*152 68 73 73CV19.38009 13 33 37Count174* 47 685 14in kg, stem is whole number 2 |47 is 2.47