Using the t-distribution, as we have the standard deviation for the sample, it is found that the 90% confidence interval is (246.6, 282.8).
<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 two-tailed <u>90% confidence interval</u>, with 16 - 1 = 15 df, is t = 1.7531.
Researching the problem on the internet, the standard deviation was of 42.1 mg/dL, hence the parameters are as follows:
Thus, the bounds of the interval are given by:
The 90% confidence interval is (246.6, 282.8).
More can be learned about the t-distribution at brainly.com/question/16162795
Answer:
Step-by-step explanation:
we know that
If two figures are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent
The corresponding vertical sides are y and 2
The corresponding horizontal lines are x and 1
so
The proportion is equal to
Answer:
Unit rate is $ 2.50. It represents the cost of one pound of birdseed.
Step-by-step explanation:
Given:
Cost of half a pound of birdseed = $ 1.25.
Unit rate is the rate of one pound of birdseed.
∵ Cost of half a pound of birdseed = $ 1.25.
∴ Cost of 1 pound of birdseed =
Therefore, the unit rate is $ 2.50 and it represents the cost of one pound of birdseed.
Answer:
80
Step-by-step explanation:
area is length × width. 8 × 10 = 80