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Math Help - hi, i need some help(test of means and proportions)

  1. #1
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    hi, i need some help(test of means and proportions)

    alright here is the question,
    Beer shelf live is a problem for brewers and distributors, because when beer is stored at room temperature, its flavor deteriorates. When the average furfuryl ether content reaches 6 ug per liter, a typical consumer begins to taste an unpleasant chemical flavor. At alpha = .05, would the following sample of 12 randomly chosen bottles stored for a month convince you that the mean furfuryl ether content exceeded the taste threshold? What is the p-value?
    6.53
    5.68
    8.1
    7.5
    6.32
    8.75
    5.98
    7.5
    5.01
    5.95
    6.40
    7.02
    OK, now when i put this into megastat with the alternative set to (greater then)and a confidence interval of 95% and i get

    6.00000 hypothesized value
    6.72833 mean mg per liter
    1.07771 std. dev.
    0.31111 std. error
    12 n
    11 df
    2.34 t
    .0195 p-value (one-tailed, upper)

    can someone help me to solve the question about the threshold, i am confused about the alpha at .05 part, should i make the confidence interval .05 maybe? i don't know help me out
    thanks for your help in advance you guys are great
    Last edited by rockin95; May 16th 2009 at 11:38 PM.
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