Mathematics, 28.11.2019 03:31, rhill5
The average number of pages for a simple random sample of 40 physics textbooks is 435. the average number of pages for a simple random sample of 30 mathematics textbooks is 410. assume that all page length for each types of textbooks is normally distributed. the standard deviation of page length for all physics textbooks is known to be 40, and the standard deviation of page length for all mathematics textbooks is known to be 40. part one: assuming that on average, mathematics textbooks and physics textbooks have the same number of pages, what is the probability of picking samples of these sizes and getting a sample mean so much higher for the physics textbooks (one-sided p-value, to four places)? the above p-value comes from a test-statistic of z=40] (enter number without sign). is there evidence at the 20% level that, on average, physics textbooks tend to be longer than mathematics textbooks? yes ono at the 15% level, that physics textbooks and mathematics textbooks tend to be the same length (rather than physics textbooks being longer) be rejected? ono yes
Answers: 2
Mathematics, 21.06.2019 16:50, fireman59937
Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x
Answers: 1
Mathematics, 21.06.2019 23:30, claytonhopkins
In a study of the relationship between socio-economic class and unethical behavior, 129 university of california undergraduates at berkeley were asked to identify themselves as having low or high social-class by comparing themselves to others with the most (least) money, most (least) education, and most (least) respected jobs. they were also presented with a jar of individually wrapped candies and informed that the candies were for children in a nearby laboratory, but that they could take some if they wanted. after completing some unrelated tasks, participants reported the number of candies they had taken. it was found that those who were identiÄÂŹed as upper-class took more candy than others. in this study, identify: (a) the cases, (b) the variables and their types, (c) the main research question, (d) identify the population of interest and the sample in this study, and (e) comment on whether or not the results of the study can be generalized to the population, and if the ÄÂŹndings of the study can be used to establish causal relationships.
Answers: 2
The average number of pages for a simple random sample of 40 physics textbooks is 435. the average n...
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