Answer:
0.3108 is the probability that the sample mean is between 7.8 and 8.2 minutes.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 8 minutes
Standard Deviation, σ = 2.5 minutes
Sample size, n = 25
We are given that the distribution of time spent is a bell shaped distribution that is a normal distribution.
Formula:

Standard error due to sampling =

P(sample mean is between 7.8 and 8.2 minutes)

0.3108 is the probability that the sample mean is between 7.8 and 8.2 minutes.
Answer:
m < 1.4
Step-by-step explanation:
Make
a decimal.
1.6
3 > m + 1.6
m < 1.4
Answer:
5 no i am not preety sure though
Answer:
c,d,and e are true....hope you understand...