Mercedes is conducting a study about the costs of prom dresses. her school has 2500 students. she asks 10 of the girls in her ap statistics class to participate in a survey. she bases her findings on these results. is this a valid study? why or why not?
a) no, she should ask the girls in her chorus class instead
b) yes, asking 10 girls in her class will give her a good sample to work with.
c) yes, drawing a sample only from ap statistics gives a random sample of girls attending prom at the school.
d) no, drawing a sample only from ap statistics does not give a random sample of girls attending prom at the school.

What is the prime factorization of 230

The vice president of programming at nbc is finalizing the prime-time schedule for the fall. she has decided to include a hospital drama but is unsure which of two possibilities to select. she has a pilot called the surgeon and another called critical care. to her make a final decision, a sample of 20 viewers from throughout the united states was asked to watch the two pilots and indicate which show they prefer. the results were that 12 liked the surgeon, 7 liked critical care, and one had no preference. state the decision rule, using the 0.10 significance level. h0: π = 0.50 h1: π ≠ 0.50 1. reject h0 if number of + signs is either < = or > = 2. what is your decision regarding h0? is there a preference for one of the two shows?

When you divide a fraction less than 1 by a whole number greater than 1 is the quotient less than,greater than, or equal to the dividend?