Answer:
68
Step-by-step explanation:
12 + 5 = 17
17 x 4 = 68
Andrea's monthly allowance is $68.
Answer:
,
and volume of cerebral brey matter for a child whose head circumference Z score at age 12 months was 1.9 is 
Step-by-step explanation:
We attached a table below,
We attached a table below,
Therefore ,
correlation coefficient 


We calculate the least squares equation.

Now , calculate intercept coefficient.


Therefore, the regression equation is, 
Find the volume of cerebral brey matter for a child whose head circumference Z score at age 12 months was 1.8


Using the t-distribution, as we have the standard deviation for the sample, it is found that the 95% confidence interval is (29.6, 44.4).
<h3>What is a t-distribution confidence interval?</h3>
The confidence interval is:

In which:
is the sample mean.
- s is the standard deviation for the sample.
The critical value, using a t-distribution calculator, for a <u>two-tailed 95% confidence interval</u>, with 25 - 1 = <em>24 df</em>, is t = 2.0639.
The other parameters are given by:
.
Hence, the bounds of the interval are given as follows:


The 95% confidence interval is (29.6, 44.4).
More can be learned about the t-distribution at brainly.com/question/16162795
Answer: 31 and 33
Step-by-step explanation: THIS IS NOT A VERIFIED ANSWER SO IF ITS WRONG IM AM TERIBLY SORRY BUT CAN I PLEASE GET BRAINLIEST