A principal made a scatter plot of the number of students in his school who
own a cell phone compared to the year.
The trend line has an equation of
y = 25x + 121 where y is
the number of students
who own cell phones and
xis the number of
years since 2010.
HELP‼️‼️‼️

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

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