Which data set has a greater spread? Why?
Set A: {38, 12, 23, 48, 55, 16, 18}
Set B: {44, 13, 24, 12,56}

has a greater spread because

Blank 1 options: Set A or B
Blank 2 options:
1) it has more data values
2) its mean is greater
3) its median is greater
4) its range is greater

Test statistics of 1.455

P-value = 0.0728

Step-by-step explanation:

From the given information:

The test statistics can be computed as:

Z = 1.455

We want to test if the customer satisfaction increased significantly(one-tailed test)

Null hypothesis:

Alternative hypothesis:

P-value = P(Z>1.455)

= 0.0728

b) Type II error implies the error of accepting when is true.

This implies inferring that there is no huge improvement in passenger's satisfaction when there is.

c) Type 1 and Type II errors are inversely proportional. In this situation, as one increases, the other definitely decreases.

∴ A Smaller value of Type II error will be achieved by a higher type I error.

⇒ 0.10