Which of the following is a two-dimensional shape that has exactly one set of parallel sides and a total of four angles?

1 answer:

4 0

Some shapes that are classified as quadrilaterals are square, rectangle, ... It has 4 right angles and the opposite sides are equal. ... A parallelogram has both pairs of opposite sides that are parallel. ... It has exactly one pair of parallel sides.

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TIME REMAINING37:15How many square inches are in 60 square feet?

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A manufacturer of cell phone screens is concerned because 12 percent of the screens manufactured using a previous process were r

fomenos

Answer: A.

$H_0:p=0.12\\\\H_a:p$

Step-by-step explanation:

Null hypothesis $(H_0)$ : A statement describing population parameters as per the objective of the study. It usually takes "≤,≥,=" signs.

Alternative hypothesis $(H_a)$ : A statement describing population parameters as per the objective of the study. It usually takes ">, <, ≠" signs.

Let p be the proportion of screens that will be rejected.

12 percent of the screens manufactured using a previous process were rejected at the final inspection.

(i.e. p= 0.12)

Objective of the study = whether the new process<em> reduces </em>the population proportion of screens that will be rejected

i.e. p< 0.12

So, the appropriate hypotheses to investigate whether the new process reduces the population proportion of screens that will be rejected:

$H_0:p=0.12\\\\H_a:p$

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