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 17:00
The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.
Answers: 3
Mathematics, 21.06.2019 18:00
Ijust need to see how to do this. so you donโt have to answer all of them just a step by step explanation of one.
Answers: 3
Mathematics, 21.06.2019 22:20
The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22
Answers: 1
Aresearcher posts a magazine advertisement offering $30 in exchange for participation in a short stu...
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