Question

In order to ensure the consistency of their product, the Oriental Spice Sauce company has a...

In order to ensure the consistency of their product, the Oriental Spice Sauce company has a strict policy that the standard deviation of the sodium content in the product is 140mg. For one size of bottle, the sodium content is supposed to be 900mg. In a random sample of 11 bottles, the standard deviation was found to be 275.4444mg. Is there evidence at ?=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 null and alternative hypotheses. Round to four decimal places when necessary.

Step 2 of 5:

Determine the critical value(s) of the test statistic. If the test is two-tailed, separate the values with a comma. Round your answer to three decimal places.

Step 3 of 5:

Determine the value of the test statistic. Round your answer to three decimal places.

Step 4 of 5:

Make the decision.

Step 5 of 5:

What is the conclusion?

Homework Answers

Answer #1

Step 1:

Null Hypothesis

Alternative Hypothesis (Right Tailed Test )

Step 2:

Degrees of freedom = n-1= 11-1= 10

The critical value of Chi square for 10 df, at 1% significance level is 23.209

Step 3:

Under H0, the test statistic is

Step 4:

Since Chi square calculated is greter than critical value of chi square, REject H0.

Step 5:

Henec we have enough evidence that that the standard deviation of the sodium content exceeds the desired level (i.e. > 140mg)

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