Chi-squared test: it has been reported that the standard deviation of the speeds of drivers on a rural highway is 6 mph for all vehicles. a driver believes from her personal experience that the standard deviation is greater than 6 mph. a study was conducted and for 30 drivers and the standard deviation was 8.2 miles per hour. at alpha = 0.05, is the driver correct. place either choice a or b in the space provided below.

a) yes, the driver is correct

b) no, the driver is not correct

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step-by-step explanation:

mark brainliest!

answer:

given the linear inequality :

add 2y to both sides we get;

simplify:

add 12 to both sides of an equation;

simplify:

divide both sides by 2 we get;

or

the related equation for the inequality equation [1] is;

y-intercepts defined as the graph crosses the y-axis.

substitute x =0 in [2] to solve for y;

y = 6

x-intercepts defined as the graph crosses the x-axis.

substitute value y = 0 to solve for x;

subtract 6 from both sides we get

multiply both sides by 2 we get;

or

x = -12

now, plot these point (0, 6) and (-12, 0) on graph as shown below and shade the graph below the solid line.