Aresearch group wants to determine whether the proportion of car accidents that were caused by drivers using cell phones has changed from the previous value of 13%. they obtained 10,000 auto accident reports and found that 14% were caused by drivers using cell phones. find the test statistic.

-2.88

Step-by-step explanation:

Hypothesis : The proportion of car accidents that were caused by drivers using cell phones has changed from the previous value =13%

i.e. p=0.13

Sample size :

The proportion of auto accident were caused by drivers using cell phones.

Now, the test statistic for the population proportion is given by :-

Hence, the value of the test statistic is -2.88

i got 142 as my answer

step-by-step explanation:

step-by-step explanation:

sry but any answer choices