3x^-2 can be written
3/x^2 because x^-2 is = 1/x^2
When the sign is < or > (less than/greater than), you graph an open circle.
When the sign is ≤ or ≥ (less than/greater than <u>or equal to)</u>, you graph a closed circle.
The 4th option is your answer since the sign is ≥
9+(-9)=0 you are showing the opposite sign of the number that added together would give you the sum of zero.
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.