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statistics alive
Statistics Alive 3rd Edition Wendy J. Steinberg, Matthew Price - Solutions
You read a study that reports that p = .025. What confidence can you have that the results are due to the treatment rather than to mere sampling error?
Here, again, is the set of statistics test scores we worked with in Modules 3 and 4.Find the (a) Mode, (b) Median (by formula), (c) Mean for these data.
Maizy Lewis runs a large day care center. She wonders whether the presence of other children affects any single child’s willingness to perform simple motor tasks (assembling a puzzle, coloring a picture, etc.). She randomly selects 34 children. She isolates 18 of the children from their peers,
A cognitive psychologist was curious as to why women tend to physically turn a map’s position to match the direction they are moving in, while men tend to keep the map in its original position and mentally change orientations as they move. She wondered if there is a sex difference in the ability
A video arcade owner wondered if boys or girls spend more time playing the games once they enter the arcade. He recorded the playing time for boys and girls selected at random. No more than one person was selected from among a group of friends, to minimize the effect of group behavior on
State whether the investigator should use independent samples, repeated measures, or matched samples:a. An investigator wants to know whether men or women select larger entrée portions in a cafeteria food line. He watches men and women as they go through a food line and rates the relative size of
State whether the investigator should use independent samples, repeated measures, or matched samples:a. An investigator wants to know whether children from different socioeconomic levels differ in the age at which they learn to skip. She gathers information about children’s socioeconomic levels
State whether the investigator should use independent samples, repeated measures, or matched samples:a. An investigator wants to know if parental marital status is related to children’s reading achievement. She draws a sample of children from single-parent homes and a sample of children from
Joe is taking a bowling course for his physical education elective in college. He wonders whether the course significantly improves students’ bowling averages. He records his and his fellow students’ bowling averages at the beginning of the course and again at the end of the course. Here are
You read a study that reports that p = .07. What confidence can you have that the results are due to the treatment rather than to mere sampling error?
You read a study that reports that p = .04. What confidence can you have that the results are due to the treatment rather than to mere sampling error?
On a reaction time task, 11 randomly selected college students take an average of 0.60 s to respond to a prompt. On the same reaction time task, 11 randomly selected middleaged adults take an average of 0.79 s to respond to the prompt. The value of sM1-M2 is 0.048 s. What is the 95% confidence
A teacher grades in such a way that exactly 50% of the students earn either a B or higher grade. If a student drawn at random takes four unrelated courses with this teacher, what is the probability that the student will earna. All four grades of B or higher,b. Exactly three grades of B or higher,
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