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.
Answer:
The correct answer is the value of x is 4 and y is 1 respectively.
Step-by-step explanation:
The system of equations are −5x + 13y = −7 and 5x + 4y = 24.
To solve for x and y.
For solving we add both sides of the given system of equations.
∴ −5x + 13y + 5x + 4y = 24 - 7
⇒ 17y = 17
⇒ y = 1
⇒ x = 4
Thus the values of x and y are 4 and 1 respectively.
Answer:
16
Step-by-step explanation:
you add all of them up and then divide by how many numbers you have total.
17+21+14+17+12+15=96
96/6
=16
The function can be factorised to give x²(x²-5). Therefore the graph will touch the x axis at zero and cut it at -√5 and √5, giving three x-intercepts. To check, let's look at a graph my calculator drew of this function:
Answer:
x = 9
Step-by-step explanation:
So here we Cross-Multiply;
-24(x) = -36(6)
-24x = -216
Divide both sides by -24
x = 9