SOLUTION: The level of calcium in the blood of healthy young adults follows a Normal distribution with mean μ = 10 milligrams per deciliter and standard deviation σ = 0.4. A clinic

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Question 1056825: The level of calcium in the blood of healthy young adults follows a Normal distribution with mean μ = 10 milligrams per deciliter and standard deviation σ = 0.4. A clinic measures the blood calcium of 100 healthy pregnant young women at their first visit for prenatal care. The mean of these 100 measurements is = 9.8. Is this evidence that the mean calcium level in the population of healthy pregnant young women is less than 10? To answer this, test the hypotheses H0: μ = 10 versus Ha: μ < 10 at the 5% significance level.
What is the value of the P-value?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Calculate the z statistic,
z=%289.8-10%29%2F%280.4%2Fsqrt%28100%29%29=-5
At this z value,
P=2.8x10%5E%28-7%29
Yes, there is evidence that mu%3C10