Question

in number 4 in the picture show that n= 29

D F G J K N M pause be C2$25 o3.24 N2 68 C3$36 3.24 N 39 af2.25 N, 112 Answer: n= 26, n;= 16, n2 = 7, ns = 3 4. A psychologist working with a group of mentally retarded adults desires to estimate their average reaction time to a certain stimulus. She thinks that men and women probably will show a difference in reaction times, so she wants to stratify The group of 96 people contains 43 men. In previous studies of this type, researchers have found that the times range from 5 to 20 seconds for men and from 3 to 14 seconds for women. gender. on The costs of sampling are the same for both strata. Using optimum allocation, find the approximate sample size necessary to estimate the average reaction time for the group to within 1 second. Answer:n 29 5. A county government is interested in expanding the facilities of a day-care center for mentally retarded children. The expansion will increase the cost of enrolling child in the center. A sample survey will be conducted to estimate the proportion a () asaa pei 6 do 3as suesuo Nos-sAs Ajos-Ajod Ajos-unu Jeap aige 37 RAa-Jdxa wopue *POJ ep asip/6age puz asul INSTRUMENTS TEXAS

Answer 1

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