To investigate a community’s reading habits, a magazine invites readers to complete and mail in a survey. what is the sampling method?

a. convenience sampling
b. systematic sampling
c. self-selected sampling
d. random sampling

does the sampling method have any bias?

a. yes, because the survey is leading. it suggests that a certain answer is wanted.
b. yes, because the people who respond to the survey may underrepresent the number of readers in the community.
c. no, the sampling method has no bias because part of the population equally represents the entire population.
d. yes, because the people who respond to the survey may overrepresent the number of readers in the community.

Which compound inequality could be represented by the graph?

In a test for esp (extrasensory perception), the experimenter looks at cards that are hidden from the subject. each card contains either a star, a circle, a wave, a cross or a square.(five shapes) as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. when the esp study described above discovers a subject whose performance appears to be better than guessing, the study continues at greater length. the experimenter looks at many cards bearing one of five shapes (star, square, circle, wave, and cross) in an order determined by random numbers. the subject cannot see the experimenter as he looks at each card in turn, in order to avoid any possible nonverbal clues. the answers of a subject who does not have esp should be independent observations, each with probability 1/5 of success. we record 1000 attempts. which of the following assumptions must be met in order to solve this problem? it's reasonable to assume normality 0.8(1000), 0.2(1000)%30 approximately normal 0.8(1000), 0.2(1000)% 10 approximately normal srs it is reasonable to assume the total number of cards is over 10,000 it is reasonable to assume the total number of cards is over 1000

Pleting the square f the given find the x-intercepts of the parabola with vertex (-5,13) and y-intercept (0, 12). write your answer in this form: (14,.99). if necessary, round to the nearest hundredth. *- h enter the correct answer, de verter, and ametry 00000 done doo