The owner of a local nightclub has recently surveyed a random sample of n = 250 customers of the club. she would now like to determine whether or not the mean age of her customers is greater than 30. if so, she plans to alter the entertainment to appeal to an older crowd. if not, no entertainment changes will be made. if she wants to have a level of significance at 0.01, what rejection region should she use?
1. reject h0 if t < -2.3263.
2. reject h0 if t > 2.3263.
3. reject h0 if t < -2.5758.
4. reject h0 if t > 2.5758.

Option 2.

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = 30

Sample size, n = 250

Alpha, α = 0.01

First, we design the null and the alternate hypothesis

We use Right-tailed t test to perform this hypothesis.

Formula:

Now,

Decision rule:

For a right ailed t-test,

, we reject the null hypothesis as it lies in the rejection area.

, we fail to reject the null hypothesis as it lies in the acceptance area and accept the null hypothesis.

Thus,

Option 2.

what

answer: yard ramps with a level off platform are typically 36 feet long. truck, rather than at an angle, enabling access to those pallets at the very back of the truck. if you are using your yard ramp to convert a loading dock into a drive-in door, we even at 60 inches (5 feet) high and a 30 foot ramp, the slope of the ramp will be less

step-by-step explanation: