lab hypotheses,

  1. lab hypotheses,

  2. In a previous lab we tested the following hypotheses, LaTeX: H_0H 0LaTeX: \mu=4.73μ = 4.73 and LaTeX: H_aH aLaTeX: \mu<4.73μ < 4.73 (where LaTeX: \muμ is the mean number of alcoholic drinks consumed by students at a liberal arts college).In a random sample of 75 students, the mean was 3.93 alcoholic drinks consumed in a week. Here is the StatCrunch output from the hypothesis test.
    LaTeX: \muμMean of variable
    LaTeX: H_0H 0: LaTeX: \mu=4.73μ = 4.73
    LaTeX: H_AH ALaTeX: \mu\ne4.73μ ≠ 4.73

    Hypothesis test results
    Variable Sample Mean Std. Err. DF T-Stat P-value
    number of drinks per week 3.9333333 0.43592434 74 -1.8275343 0.0717

    Using this context and the StatCrunch output, explain the meaning of each of the following.

    1. Std. Err (standard error)
    2. T-stat (T-score)
    3. P-value
  3. lab hypotheses,

  4. In a previous matched pairs lab we tested the following hypotheses, where LaTeX: \muμ is the mean of the differences in corn yield for a plot of land (regular seed minus kiln-dried): H0: µ = 0 and Ha: µ < 0. In a random sample of 11 seeds of each type, the mean of the differences in the sample was -33.7. Here is a StatCrunch print-out of the hypothesis test.Paired T hypothesis test:
    LaTeX: \mu_D=\mu_1-\mu_2μ D = μ 1 − μ 2: Mean of the difference between Regular seed and Kiln-dried seed
    LaTeX: H_0H 0LaTeX: \mu_D=0μ D = 0
    LaTeX: H_AH ALaTeX: \mu_D<0μ D < 0

    Hypothesis test results
    Difference Mean Std. Err. DF T-Stat P-value
    Regular seed – Kiln-dried seed -33.727273 19.951346 10 -1.6904761 0.0609

    Differences stored in column, Differences.
    Using this context and the StatCrunch output, explain the meaning of each of the following.

    1. Std. Err (standard error)
    2. T-stat (T-score)
    3. P-value.

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Author Since: November 30, 2020