Five weeks after the introduction of a new toy, the manufacturer found that the demand for the toy was modeled by f(x) = x^2 +5x
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Answer:
The average number of sticks of gum a person chewed daily was greater than 8.
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = 8
Sample mean, = 9
Sample size, n = 36
Alpha, α = 0.05
Population standard deviation, σ = 1
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 fail to accept the null hypothesis and reject the null hypothesis. We accept the alternate hypothesis.
Thus, the average number of sticks of gum a person chewed daily was greater than 8.