An old medical textbook states that the mean sodium level for healthy adults is 142 mEq per liter of blood. A medical re

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An Old Medical Textbook States That The Mean Sodium Level For Healthy Adults Is 142 Meq Per Liter Of Blood A Medical Re 1 (99.39 KiB) Viewed 25 times

An old medical textbook states that the mean sodium level for healthy adults is 142 mEq per liter of blood. A medical researcher believes that, because of modern dietary habits, the mean sodium level for healthy adults, H, now differs from that given in the textbook. A random sample of 13 healthy adults is evaluated. The mean sodium level for the sample is 136 mEq per liter of blood. It is known that the population standard deviation of adult sodium levels is 14 mEq. Assume that the population is normally distributed. Can we condude, at the 0.05 level of significance, that the population mean adult codium level differs from that given in the textbook? Perform a two tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.) 0 р C (a) State the null hypothesis H, and the alternative hypothesis H. H:0 Du 지 s ecco A LO (b) Determine the type of test statistic to use. 로 모 - (Choose one) Y (c) Find the value of the test statistic. (Round to three or more decimal places.) 口口 10 D x x 5 2 (d) Find the two critical values. (Round to three or more decimal places.) and (e) Can we conclude that the population mean adult sodium level differs from that given in the textbook? Yes No