Please help I'm struggling.
1 answer:
The value of d(-8) is d(-8) = -8
Step-by-step explanation:
We are given d(x)=x and we need to find d(-8)
To find d(-8) we will put -8 instead of x in the given equation.
Putting x=-8 we get:
So, The value of d(-8) is d(-8) = -8
Keywords: Solving Equations
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Answer:
We reject the null hypothesis and accept the alternate hypothesis. Thus, it be concluded that the population mean is less than 20.
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = 60
Sample mean, = 19.5
Sample size, n = 60
Alpha, α = 0.05
Population standard deviation, σ = 1.8
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, it be concluded that the population mean is less than 20.