Answer:
B
Step-by-step explanation:
1500 * 0.07 = 105
105 + 1500 = 1605
$5 per hour is the constant rate because 10/2 is 5, 20/4 is 5 etc.
Answer:
Assuming ages are normally distributed, the 98% confidence interval for the population average age is [26.3, 35.7].
Step-by-step explanation:
We have to construct a 98% confidence interval for the mean.
The information we have is:
- Sample mean: 31
- Variance: 49
- Sample size: 15
- The age is normally distributed.
We know that the degrees of freedom are

Then, the t-value for a 98% CI is t=2.625 (according to the t-table).
The standard deviation can be estimated from the variance as:

The margin of error is:

Then, the CI can be constructed as:

Answer:
The answer would be, both A. and B.