Question

verify the answers in number 5

RS that men ad women realction times, so she wants to stratify gender. on 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. The costs of sampling allocation, find the approximate sample size necessary to estimate the average reaction time for the group to within 1 second. Answer: n 29 are the same for both strata. Using optimum 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 of families with retarded children that will make use of the expanded facilities. The families are divided into those who use the existing facilities and those who do not. Some families live in the city in which the center is located, and some live in the surrounding suburban and rural areas. Thus, stratified random sampling is used, with users in the city, users in the surrounding country, nonusers in the city, and nonusers in the country forming strata 1, 2, 3, and 4, respectively. Approximately 90% of the 54 OType here to search 1e esc echapo % # T W S caps lock verrmaj V ZX Continue nubor 5 present users and 50 % of the present nonusers will use the expanded facilities. The Cost of obtaining difference in cost results because nonusers are difficult to locate. Existing records give N-97. Ny= 43, Ny = 145, and N = 68. Find the approximate sample size and allocation necessary to estimate the population proportion with a bound of 0.05 on the error of estimation. Answer: n = an observation from a user is $4 and from a nomuser is $8. The 158, n 39, ng 17, n3 = 69, n4 = 33 6 The survey in the preceding ouestion is conducted and vielde the following prOr - ortion

Answer 1

Sol:- Given 507. the non-usens will use the Expanded bailfties The Cat d oblaining an obsenvaion is u fsom a non-we Find the oppozimate e an 8 faom Sample S2e anl allotaiom necesay to estinake the Rpulaton poption wwitf a bound o as d the ervie eatination Su C l45 68 43 97 N O.9 O-9 Find the ochions eb obsovalions d Each slaatum Ni Ni 14.5S o.248 $8.653 6.4S ES98S

2S.633 0.437 58.653 2.02 0.20s 58.653 Subetitute son inbamadion into a. ND+NV 22sq4.43 77.88 t6s.8S S7. 2 ISB in the gonple to Thene need to be Jet botind oas the ep estination. The allaation ds the populatior ollue n no mi 39 /12 17