A publisher reports that 79% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 150 found that 72% of the readers owned a laptop. Find the value of the test statistic. Round your answer to two decimal places.

The value of the test statistic is -1.91.

Step-by-step explanation:

We are given that a publisher reports that 79% of their readers own a laptop. A random sample of 150 found that 72% of the readers owned a laptop.

A marketing executive wants to test the claim that the percentage is actually different from the reported percentage.

Let p = population % of readers who own a laptop

SO, Null Hypothesis, : p = 79%  {means that the percentage is same as that of the reported percentage}

Alternate Hypothesis, : p 79%  {means that the percentage is actually different from the reported percentage}

The test statistics that will be used here is One-sample z proportion statistics;

                T.S. =   ~ N(0,1)

where, = % of the readers who owned a laptop in a sample of 150 readers = 72%

         n  = sample of readers = 150

So, test statistics  =  

                               = -1.91

Therefore, the value of the test statistic is -1.91.

d (5 x (-20)) * (100 x (0.7))

step-by-step explanation:

5÷1/100 * -.7 *-20

copy dot flip

5*100 * -.7 *-20

rearrange

5*-20   * 100 *-.7

-100   *-70

7000

10000

step-by-step explanation: divide by 2,