I need help with one problem from my statistic homework! please help :)

Question

anonymous · Answer

attachment

anonymous · Answer

how do i set up this equation

anonymous · Answer

is it 110-100/5 and 110-106/1

anonymous · Answer

Z-SCORE = (VALUE - MEAN)/(STANDARD DEVIATION)

anonymous · Answer

is it -2 and -4?

anonymous · Answer

No, these z- values are going to be positive. Use the formula.

anonymous · Answer

so what i had before was write. 110-100/5= 2 and 110-106/1=4

anonymous · Answer

is is asking for the z-score of the unusual speed? how do i know which one is unusual?

anonymous · Answer

The one with the largest absolute value of the z-score is the one having the most number of standard deviations from the mean and is thus the most unusual.

anonymous · Answer

so 4 is the unusual z-score?
right?

anonymous · Answer

Yes. Good. Values 4 standard deviations above the mean occur by chance less than 1/ 10,000.

anonymous · Answer

thank you so much :)

anonymous · Answer

You are very welcome. Regards.