 QUESTION

# Over the past several months, an adult patient has been treated for tetany (severe muscle spasms). This condition is associated with an average total...

mg/dl

(b)

Find a 99.9% confidence interval for the population mean of total calcium in this patient's blood. (in mg/dl; round your answer to two decimal places.)

lower limit

mg/dl

upper limit

mg/dl

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 totalcalcium tests gave the following readings (in mg/dl). Assume that the population ofx 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 ; and the sample standard deviation 5. (in mg/dl; round your answers to two decimal places.) x = [— mg/dls = mg/dl (b) Find a 99.9% confidence interval for the population mean of total calcium in this patient's blood. (in mg/dl; round your answer to two decimal places.)lower limit mg/dlupper limit mg/dl (c) Based on your results in part (b), do you think this patient still has a calcium deﬁciency? Explain.