Mathematics, 23.10.2019 01:30, vhs35
An agricultural scientist wanted to compare the effect of a new fertilizer to that of three older fertilizers—x, y, and z—on the growth of vegetables typically grown in small gardens. two hundred green bean seedlings were individually planted in identical pots and randomly assigned to one of four groups of 50 each. seedlings in one group were given the new fertilizer, and the three remaining groups of seedlings were given fertilizers x, y, or z, respectively. at the end of four weeks, all seedlings were dried and weighed. the scientist found that the mean weight of the seedlings in the group given the new fertilizer was significantly greater than the mean weights of seedlings in the other three groups. the scientist concluded that the new fertilizer was more effective than the other fertilizers for all vegetables. why is the scientist’s conclusion not appropriate?
Answers: 3
Mathematics, 21.06.2019 17:30, bradleycawley02
Lems1. the following data set represents the scores on intelligence quotient(iq) examinations of 40 sixth-grade students at a particular school: 114, 122, 103, 118, 99, 105, 134, 125, 117, 106, 109, 104, 111, 127,133, 111, 117, 103, 120, 98, 100, 130, 141, 119, 128, 106, 109, 115,113, 121, 100, 130, 125, 117, 119, 113, 104, 108, 110, 102(a) present this data set in a frequency histogram.(b) which class interval contains the greatest number of data values? (c) is there a roughly equal number of data in each class interval? (d) does the histogram appear to be approximately symmetric? if so, about which interval is it approximately symmetric?
Answers: 3
Mathematics, 22.06.2019 06:30, melissareid65
Allen wants to buy a hover board that sells for $249.99 and a helmet that is $36.54. how much change will allen receive if he gives the cashier three $100.00 bills?
Answers: 1
An agricultural scientist wanted to compare the effect of a new fertilizer to that of three older fe...
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