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narnar5664
09.10.2019 •
Mathematics
If ashley is in the 85th percentile and the mean of her test scores is 80 with a standard deviation of 15, which of the following scores would ashley most likely get on a standardized test?
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Ответ:
We need to look up on the z-table the value of z when P(Z<z) = 0.85 or P(Z>z) = 0.15
Value of z-score when p-value P(Z>z) = 0.15 is z = 1.0364
Next step is to use the formula of z-score to work out X
z-score = (X-μ) / σ
1.0364 = (X-80) / 15
1.0364 × 15 = X - 80
X = 15.546 + 80
X = 95.5
Most likely score that Ashley gets is 95.5
Ответ:
144
Step-by-step explanation:
12² is the same as 12 × 12
12 × 12 = 144