A random sample of 10 university students was surveyed to determine the amount of time spent weekly at the library. The times are: 13 14 5 6 8 10 7 12 15 3
If the times are normally distributed with a standard deviation of 5.2 hours, with 90% confidence estimate the mean weekly time at the library by all university students. LCL= 8.445 hours
a. UCL = 10.155 hours LCL= 6.595 hours .
b. UCL = 12.005 hours LCL= 7.193 hours
c. UCL = 11.407 hours LCL= 0.747 hours O
d. UCL = 17.853 hours

correct answer is option b.

step-by-step explanation:

the true statement about geometric figure is option b that is one line can be drawn through all three points.

if three points are on the same plane, they can be connected by a line.

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation:

not sure but it may be b, as i said i'm not sure.