John will need to sleep for 10.3 hours before his second exam so that the
average of his two exam scores is an 80.
We were given
8 hours of sleep = 70
To get average of 80
<u>70+ x</u> = 80
2
Cross multiply:
70+x = 160
x= 160-70
= 90.
If 8 hours of sleep = 70
x hours of sleep = 90
Cross multiply
8× 90 = 70 × x
720 = 70x
x = 720/70
x = 10.2857
≈ 10.3 hours of sleep
Read more about Equation here brainly.com/question/17202391
The store that has a greater variety of numbers of wristbands sold is the store whose box plot has a greater IQR value.
<h3>How do we Determine Variability in a Box Plot?</h3>
- Variability of a data distribution that is represented by a box plot can be determined by the interquartile range (IQR) = Upper Quartile (Q3) - Lower Quartile (Q1).
- See the diagram attached below to understand how to get the Q3 and Q1 of the data distribution.
In conclusion, variability is a measure of IQR. The greater the IQR of a box plot, the greater the variety. Thus, the store that has a greater variety of numbers of wristbands sold is the store whose box plot has a greater IQR value.
Learn more about variability on:
brainly.com/question/14277132
Answer: An interval is a range of values for a statistic.
Explanation:
For example, you might think that the mean of a data set falls somewhere between 10 and 100 (10 < μ < 100). That “somewhere between 5 and 15%” is an interval estimate.
one year as a full-time student........ hope this helps you
They are guilty of the crime of conspiracy