An old medical textbook states that the mean sodium level for healthy adults is 142 mEq per liter of blood. A medical re
Posted: Mon Jul 11, 2022 11:22 am
An old medical textbook states that the mean sodium level forhealthy adults is
142
mEq
per liter of blood. A medical researcher believes that,because of modern dietary habits, the mean sodium level for healthyadults,
μ
, now differs from that given in the textbook.A random sample of
50
healthy adults is evaluated. The mean sodiumlevel for the sample is
139
mEq
per liter of blood. It is known that the populationstandard deviation of adult sodium levels is
15
mEq
. Can we conclude, at the
0.10
level of significance, that the populationmean adult sodium level differs from that given in thetextbook?
Perform a two-tailed test. Then complete the partsbelow.
Carry your intermediate computations to three or more decimalplaces, and round your responses as specified below. (If necessary,consult a list of formulas.)
142
mEq
per liter of blood. A medical researcher believes that,because of modern dietary habits, the mean sodium level for healthyadults,
μ
, now differs from that given in the textbook.A random sample of
50
healthy adults is evaluated. The mean sodiumlevel for the sample is
139
mEq
per liter of blood. It is known that the populationstandard deviation of adult sodium levels is
15
mEq
. Can we conclude, at the
0.10
level of significance, that the populationmean adult sodium level differs from that given in thetextbook?
Perform a two-tailed test. Then complete the partsbelow.
Carry your intermediate computations to three or more decimalplaces, and round your responses as specified below. (If necessary,consult a list of formulas.)