Mathematics, 25.12.2019 14:31 alysiareyes
Aresearcher posts a magazine advertisement offering $30 in exchange for participation in a short study. the researcher accepts the first three people who respond to the advertisement. which of the following statements is true about the sample?
a. it is not a valid sample because it is not a random sample of the population.
b. it is a valid sample because the first three people were selected to participate. c. it is a valid sample because money was offered to participants.
d. it is not a valid sample because it is only a short study.
Answers: 2
Mathematics, 21.06.2019 12:30
Are carpet coast $15 per square metre. the total delivery charge is $21 peter buys n squared metres of carpet what is the expression which represents the total cost in $
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Mathematics, 21.06.2019 22:00
Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.
Answers: 1
Mathematics, 22.06.2019 01:00
In a tutoring session, 2/3 of an hour was spent reviewing math problems. adelina attended 3/4 of the tutoring session. how much time did adelina spend at the tutoring session?
Answers: 2
Aresearcher posts a magazine advertisement offering $30 in exchange for participation in a short stu...
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