Question

The manufacturers of Ramen noodles, a staple food of the average college student, are concerned that the sodium levels in their product vary too much. A package of Ramen is supposed to contain 1100 mg of sodium with a standard deviation of 110 mg. A sample of 20 packages was analyzed and the sample standard deviation was 192.5736 mg. Is there evidence at α = 0.005 that the standard deviation of the sodium content exceeds the desired level? Assume the population is normally distributed.

Answer #1

The manufacturers of Oriental Spice Sauce are concerned that the
sodium levels in their product vary too much. A package of the
sauce is supposed to contain 1100mg of sodium with a standard
deviation of 150mg. A sample of 19 packages was analyzed and the
sample mean was 1120mg and the sample standard deviation was
241.0628mg. Is there evidence at α=0.1
that variation exceeds the desired level?
Step 3 of 5 :
Determine the value of the test statistic. Round...

The manufacturers of Oriental Spice Sauce are concerned that the
sodium levels in their product vary too much. A package of the
sauce is supposed to contain 700mg of sodium with a standard
deviation of 140mg. A sample of 20 packages was analyzed and the
sample standard deviation was 240.0092mg. Is there evidence at
α=0.01 that the standard deviation of the sodium content exceeds
the desired level? Assume the population is normally
distributed.
Step 1 of 5 : State the...

The manufacturers of Oriental Spice Sauce are concerned that the
sodium levels in their product vary too much. A package of the
sauce is supposed to contain 1100mg of sodium with a standard
deviation of 110mg. A sample of 25 packages was analyzed and the
sample mean was 1080mg and the sample standard deviation was
154.8261mg. Is there evidence at α=0.1 that variation exceeds the
desired level?
Step 1 of 5 :
State the hypotheses in terms of the standard...

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