Answer:
95% confidence interval: (0.325 ,0.383)
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 231
Sample mean = 0.354 ppm
Sample standard deviation = 0.231 ppm
95% confidence interval:
Putting the values, we get,
Because there is an absolute value in this equation around the x and and you are only adding something to that, we know that this will always be positive. This eliminates all the choices except for [1,infinity), the third option.
Answer: -640, 2560
each number in the sequence is multiplied by -4 to get the next answer
Note that all of these choices but the last have 1-number responses. The last choice involves collecting data: the ages of the concert attendees. So only the last pertains to statistics.
