29. A sample of n = 10 scores has a mean of M = 15. One person with a score of 13 is added to the sample. What is the new value of the sample mean? [ Select ] 30. A researcher collects two samples. The first sample has n1 = 7 scores has a mean of M1 = 3. The second sample has n2= 3 scores has a mean of M2 = 7. What is the mean of the combined samples? [ Select ]
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Step 1
Given: n = 10, M = 15, and a new score of 13 is added. To find the new mean (M_new), we first calculate the total sum of the original scores (ΣX_old) and then add the new score (13). ΣX_old = n * M = 10 * 15 = 150 ΣX_new = ΣX_old + 13 = 150 + 13 = 163 M_new = Show more…
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