4. A normal-shaped distribution has µ = 80 and o = = $15. Compute the z-score for M = 89 for a sample of n = 25 scores. Is this sample mean in the middle 95% of the distribution?

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4. Please help with this question, i’m really stuck, thank you so much!!
4. A normal-shaped distribution has µ = 80 and 6 = $15.
Compute the z-score for M = 89 for a sample of n = 25
scores. Is this sample mean in the middle 95% of the
distribution?
Transcribed Image Text:4. A normal-shaped distribution has µ = 80 and 6 = $15. Compute the z-score for M = 89 for a sample of n = 25 scores. Is this sample mean in the middle 95% of the distribution?
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