Q6. A 95% C.I. for µ, the mean of a population of Y was obtained as: [-2.5 , 3.5]. What was the sample mean used to obtain the confidence interval? Α.-1.5 В. 0.0 C. 1.0 D. 1.5 О А. А О В. В О С. С O D. D

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Use the probability distribution to complete parts​ (a) and​ (b) below.
Activities    Probability
0    0.059
1    0.121
2    0.163
3    0.179
4    0.216
5    0.127
6    0.083
7    0.052
The number of​ school-related extracurricular activities per student
​(a) Find the​ mean, variance, and standard deviation of the probability distribution.
​(b) Interpret the results.
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