And I also need help in this one.
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Answer:
The critical value approach and the p-value approach gave the same result.
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = 4 hours
Sample mean, = 4.5
Sample size, n = 460
Alpha, α = 0.051
Population standard deviation, σ = 1.00 hour
First, we design the null and the alternate hypothesis
We use One-tailed z test to perform this hypothesis.
Formula:
Putting all the values, we have
Now,
Since,
We reject the null hypothesis and accept the alternate hypothesis. Thus, low-income families are exposed to more than 4.0 hours of daily background television.
p value at z-stat 3.87 is 0.000054. Since p-value is less than the significance level. We reject the null hypothesis.
Hence, the critical value approach and the p-value approach gave the same result.