Supposed that the z is the test statistics for hypothesis testing, calculate the value of the z for each of the following. Express your answer in 2 decimal places.
µ = 25, σ = 5, n = 80, x̄ = 23.4
oed
µ = 25, σ = 5, n = 80, x̄ = 23.4
oed
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Answer:
To find the value of z, we can use the formula:
z = (x̄ - µ) / (σ / √n)
Substituting the given values, we get:
z = (23.4 - 25) / (5 / √80)
z = -1.6 / 0.559
z ≈ -2.86 (rounded to 2 decimal places)
Therefore, the value of z is approximately -2.86.