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14 December, 07:02

In a fast food study a researcher finds that mean sodium content of 32 Wendy's fish sandwiches is 1080 milligrams with a standard deviation of 75 milligrams. The mean sodium content of 39 Long John Silver's fish sandwiches is 1120 milligrams with a standard deviation of 100 milligrams. At a = 0.05 is there enough evidence for the researcher to conclude that the Wendy's fish sandwich has less sodium than the Long John Silver's fish sandwich?

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  1. 14 December, 10:38
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    Since 95% confidence interval contains 0 we conclude at 95% confidence level that the two means are equal.

    Step-by-step explanation:

    Given that in a fast food study a researcher finds that mean sodium content of 32 Wendy's fish sandwiches is 1080 milligrams with a standard deviation of 75 milligrams. The mean sodium content of 39 Long John Silver's fish sandwiches is 1120 milligrams with a standard deviation of 100 milligrams

    H0: The two means are equal

    Ha: The two means are not equal

    (Two tailed test at 5% level)

    Variable A Variable B

    Mean 1080.00 1120.00

    SD 75.00 100.00

    SEM 13.26 16.01

    N 32 39

    95% CI: - 82.65 to 2.65

    Since 95% confidence interval contains 0 we conclude at 95% confidence level that the two means are equal.
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