A sample of n = 9 participants is obtained from a population with μ = 29,and a treatment is administered to the individuals in the sample.After treatment,the scores for the nine participants are as follows: 23,33,26,28,30,26,27,25,25.
a. Are the data sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α = .05.
b. Are the data sufficient to conclude that the treatment significantly decreased scores? Use a one-tailed test with α = .05.

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The Answer of A sample of n = 9 participants is obtained from a population with μ = 29,and a treatment is administered to the individuals in the sample.After treatment,the scores for the nine participants are as follows: 23,33,26,28,30,26,27,25,25.
a. Are the data sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α = .05.
b. Are the data sufficient to conclude that the treatment significantly decreased scores? Use a one-tailed test with α = .05.

A Sample of N = 9 Participants Is Obtained from a Population