Calculating and interpreting residuals
Chloe surveyed students in her class about the numbers
of text messages they sent and received the previous
day. An approximate least-squares regression line was
used to predict the number of text messages received
from a given number of text messages sent.
Text messages received
10
20 30 40 50 60 70 80
Text messages sent
Interpret the residual for the student indicated in the
scatter plot above

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

1. what expression would be the same as 6x+x+0 2. find the prime factorization of 60 3. write the expression for 6 + x in words.

Formulate the indicated conclusion in nontechnical terms. be sure to address the original claim. the foundation chair for a hospital claims that the mean number of filled overnight beds is over 523, and she is therefore justified starting a funding campaign to add a wing to the hospital. assuming that a hypothesis test has been conducted and that the conclusion is failure to reject the null hypothesis, state the conclusion in nontechnical terms.