div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentscanjob-49-121-63-krejcie-and-morgan-1970-2554-42-43-56-122-stratifiedhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: ScanJob - PSRUethesespsruacthlib-irpsrusitesdefaultfilessitedefaultthesisch3-01_0pdf · 49 121 63 Krejcie and Morgan 1970 2554 42 - 43 56 122 Stratified Random loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentsinreader033viewer20220414235e20ca6c78887b085c400d42html5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentscanjob-49-121-63-krejcie-and-morgan-1970-2554-42-43-56-122-stratifiedhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: ScanJob - PSRUethesespsruacthlib-irpsrusitesdefaultfilessitedefaultthesisch3-01_0pdf · 49 121 63 Krejcie and Morgan 1970 2554 42 - 43 56 122 Stratified Random loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentsinreader033viewer20220414235e20ca6c78887b085c400d42html5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentscanjob-49-121-63-krejcie-and-morgan-1970-2554-42-43-56-122-stratifiedhtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: ScanJob - PSRUethesespsruacthlib-irpsrusitesdefaultfilessitedefaultthesisch3-01_0pdf · 49 121 63 Krejcie and Morgan 1970 2554 42 - 43 56 122 Stratified Random loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentsinreader033viewer20220414235e20ca6c78887b085c400d42html5thumbnails3jpg width=140 height=200 divdivdiv...