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. X = 9.6 S = 8.6 10.5 USE SALT 8.6 9.2 9.6 mg/dl mg/dl 10.4 10.5 (a) Find the sample mean reading x and the sample standard deviation s. (Round your answers to four decimal places.) 11.2 11.1 (b) Find a 99.5% 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 mg/dl upper limit (c) Based on your results in part (b), do you think this patient still has a calcium deficiency? Explain. OYes. This confidence interval suggests that the patient may still have a calcium deficiency. OYes. 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.