Find the \ for brainliest (Give screenshot for proof)

this one is easy
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Apopulation of bolts has a mean thickness of 20 millimeters, with a population standard deviation of .01 millimeters. give, in millimeters, a minimum and a maximum thickness that includes 68% of the population of bolts.

If the null hypothesis is false and the researchers do not reject it a type 2 error has been made. true or false

Why did the following change occur? the snow that covered the ground all winter began to melt tempatures rose and flowers started to bloom