Asocial researcher wants to collect data on study habits of all first-year college students. her daughter, a first-year college student, offers to hand out brief surveys for her mother at her college library where she studies. her daughter mails 20 completed surveys back to her mother. which best describes the 20 completed surveys?
a. a convenience sample that is not representative of all first-year college students
b. a volunteer sample that is a fair representation of all first-year college students
c. a simple random sample biased against male students at the college
d. a simple random sample that is biased against students who were not at the library

Which statement about the relative areas of triangle abd and triangle xyz is true

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Arecent study focused on the number of times men and women who live alone buy take-out dinner in a month. assume that the distributions follow the normal probability distribution and the population standard deviations are equal. the information is summarized below. statistic men women sample mean 24.85 21.33 sample standard deviation 5.54 4.93 sample size 34 36 at the 0.01 significance level, is there a difference in the mean number of times men and women order take-out dinners in a month? state the decision rule for 0.01 significance level: h0: μmen= μwomen h1: μmen ≠ μwomen. (negative amounts should be indicated by a minus sign. round your answers to 3 decimal places.) compute the value of the test statistic. (round your answer to 3 decimal places.) what is your decision regarding the null hypothesis? what is the p-value? (round your answer to 3 decimal places.)