Tyesha found that the z-statistic was 2.1 and that the critical z-values were -1.96 and 1.96. which of the following is a valid conclusion based on these results?

one can reject the null hypothesis.
one can reject the alternate hypothesis.
one can accept the null hypothesis.
one cannot accept or reject the null hypothesis.

One can reject the null hypothesis.

Step-by-step explanation:

This is a 2-sided hypothesis test since we have 2 critical values; -1.96 and 1.96. The test is usually to compute the test statistic then reject the null hypothesis if the test statistic lies in the critical/rejection region.

In our case, we reject the null hypothesis since 2.1 lies to the right of 1.96 which forms a part of the critical region

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.

you have to put the graph on here with the question

step-by-step explanation: