Majesty Video Production Inc. wants the mean length of its advertisements to be 30 seconds. Assume the distribution of ad length follows the normal distribution with a population standard deviation of 2 seconds. Suppose we select a sample of 16 ads produced by Majesty. a. What can we say about the shape of the distribution of the sample mean time?
b. What is the standard error of the mean time?
c. What percent of the sample means will be greater than 31.25 seconds?
d. What percent of the sample means will be greater than 28.25 seconds?
e. What percent of the sample means will be greater than 28.25 but less than 31.25 seconds?
f. What is the probability that the sampling error would be less than or more than 1.5 seconds?

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.

its a, i had the same answer, its from study island right

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do you have an easier question cause this shh is hard like theheck

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