Mathematics

Question

Suppose that, based on a sample, the 68% confidence interval for the mean of a population is (63,75). What was the mean of the sample?
A) 73
B) 77
C) 81
D) 69

2 Answer

  • The answer is D.  

    Using the formula of Mean, [tex] \frac{∑x}{N} [/tex]
    ∑ is the summation
    x is the score
    N is the number of scores

    Therefore, Mean = ∑(63+75) / 2
    Mean = 138 / 2
    Mean = 69
  • Answer:

    can u guys just tell me what was wrong with my answer??????

    the answer is d which is 69

    Step-by-step explanation:

NEWS TODAY