Please explain where 6.63 came from in part b and why it was used. Thank you! 2.

Question

Please explain where 6.63 came from in part b and why it was used. Thank you!

2. Five randomly chosen class sizes at a university are 46, 54, 42, 46 and 32 a. Determine the range, median, mode and standard deviation of the class sizes. 42 Range . T ax-min-54-32 a2) Median Middle vale4 Mediam Most freapest va - 4 Caic 2 I44 4 -12 32 44 2 44 6 46 54 0 :@ 2 100 32+42 +46+46 454 256 -4 4 An instructor mentioned that he has 70 students in class at the above university. Can this class be considered to be rather "large"? Provide justification. b. x=70 44 Thi panliua class ha mije T0-*t - 3.92 staudadl 70-44 6 63

Explanation / Answer

This value is calculated by sqrt of sample population mean

i.e 44 = 6.63

however this is not the right method instead the sample standandard deviation i.e 8 should be used as denominator

and the calculation should be (70-44)/8 = 3.25 standard deviation from the mean.

Pls confirm if further explanation is needed regarding part b .  

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