Over the past several months, an adult patient has been treated for tetany (severe muscle spasms). This condition is associated with an average total calcium level below 6 mg/dl. Recently, the patient's total calcium tests gave the following readings (in mg/dl). Assume that the population of x values has an approximately normal distribution.
9.7 8.6 10.9 9.3 9.4 9.8 10.0 9.9 11.2 12.1
(a) use a calculator with mean and sample standard deviation keys to find the sample mean reading x and the sample standard deviation s. (Round your answers to two decimal places.)
x = mg/dl
s = mg/dl(b) Find a 99.9% confidence interval for the population mean of total calcium in this patient's blood. (Round your answer to two decimal places.)
lower limit mg/dl
upper limit mg/dl(c) Based on your results in part (b), do you think this patient still has a calcium deficiency? Explain.
Yes. This confidence interval suggests that the patient may still have a calcium deficiency.
Yes. This confidence interval suggests that the patient no longer has a calcium deficiency.
No. This confidence interval suggests that the patient may still have a calcium deficiency.
No. This confidence interval suggests that the patient no longer has a calcium deficiency.
6 years ago
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