payshencec21
02.03.2021 •
Mathematics
Florida Highway Patrol reported that 28% of fatal accidents were caused by texting while driving. A random sample of 50 fatal accidents were studied. Let p^ represent the proportion of fatal accidents in the sample caused by texting while driving.
What is the mean of the sampling distribution?
What is the standard deviation of the sampling distribution of accidents caused by texting?
Find the probability that more than 35% of the accidents in the sample were caused by texting.
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Ответ:
6. 8b²-5b-4
7. -3x²+9x-4
8. 3
9. 6a+15
Step-by-step explanation:
you will subtract/add the numbers with the same variables and exponent.
ex. (number 6) 7b²+ b²= 8b²
5b= 5b 8b²+5b-4
1-5= -4
(plus 5b because it didnt come out to a negative) if you have any questions, say in the comments and ill try my best to help