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Significance Test for a Mean (8.5 And 8.6)
A professor believes students at her school are getting fewer than 8 hours of sleep each night, on average. To test this beliet, she asks a random sample
of 24 students. How much sleep did you get last night Here are the data (in hours)
8
6
9
6
7
5.5
6
5.5
7
6
6
5.5
10
6
6.5
8.5
7.5
8
7
8
5.5
6
6
7.5
The mall and alterative hypotheses would be:
O HR=8
HR<8
H: R=8 H = 6.8
o HÔI = 68 H : H = 8
H>8

The school track has eight lanes. each lane is 1.25 meters wide. the arc at each end of the track is 180. the distance of the home straight and the radii for the arcs in the 1st 4 lanes are given. s=85m r1=36.5m r2=37.75m r3=39m r4=40.25m part one: find the radii of lanes 5 through 8 of the track. show your work. part two: if max ran around lane one, how far did he run? show your work and explain your solution. part three: max wants to run a total of three laps around the track, choose two additional lanes (2-8) for him to run and find the distance around those two lanes. show your work and round to the hundredths. part 4: based on your lane choices in part three, what was the total distance max ran in the three laps around the track?

Fiona has to plot a histogram of the given data

Write the point-slope form of an equation of the line through the points (-2, -3) and (-7, 4).