40 WAEC 2024 MATHS PAPER 1 OBJ STATISTICS VARIANCE STANDARD DEVIATION
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40. Calculate the variance of the distribution • A. 35 √ • B. 36 • C. 40 • D. 50 • SOLUTION • x f X - x̄ /X - x̄/ /X - x̄/² f/X - x̄/² • 40 1 -10 10 100 100 • 44 1 -6 6 36 36 • 48 1 -2 2 4 4 • 49 1 -1 1 1 1 • 50 1 0 0 0 0 • 53 1 3 3 9 9 • 57 1 7 7 49 49 • 59 1 9 9 81 81 • Total 8 280 • Variance = Σf/X - x̄/² • ................. • Σf • Variance = 280 / 8 • Variance = 35 ( A )","styleRuns":[{"startIndex":0,"length":909,"styleRunExtensions":{"styleRunColorMapExtension":{"colorMap":[{"key":"USER_INTERFACE_THEME_DARK","value":4294967295},{"key":"USER_INTERFACE_THEME_LIGHT","value":4279440147}]}},"fontFamilyName":"Roboto"}]},"headerRuns":[{"startIndex":0,"length":909,"headerMapping":"ATTRIBUTED_STRING_HEADER_MAPPING_UNSPECIFIED"}]}},{"itemSectionRenderer":{"contents":[{"continuationItemRenderer":{"trigger":"CONTINUATION_TRIGGER_ON_ITEM_SHOWN","continuationEndpoint":{"clickTrackingParams":"CLIBELsvGAIiEwjkgsfej8uLAxWAb3oFHcaoIzs=","commandMetadata":{"webCommandMetadata":{"sendPost":true,"apiUrl":"/youtubei/v1/next"}},"continuationCommand":{"token":"Eg0SC2dpaFkybEg2NWkwGAYyJSIRIgtnaWhZMmxINjVpMDAAeAJCEGNvbW1lbnRzLXNlY3Rpb24%3D","request":"CONTINUATION_REQUEST_TYPE_WATCH_NEXT"}}}}],"trackingParams":"CLIBELsvGAIiEwjkgsfej8uLAxWAb3oFHcaoIzs=","sectionIdentifier":"comment-item-section","targetId":"comments-section"}}],"trackingParams":"CLEBELovIhMI5ILH3o_LiwMVgG96BR3GqCM7"}},"secondaryResults":{"secondaryResults":{"results":[{"compactVideoRenderer":{"videoId":"eb9A6ij3LR0","thumbnail":{"thumbnails":[{"url":"https://i.ytimg.com/vi/eb9A6ij3LR0/hqdefault.jpg?sqp=-oaymwEbCKgBEF5IVfKriqkDDggBFQAAiEIYAXABwAEG rs=AOn4CLA9c0CiFo7wGYG4N041mhhEUePJ9g","width":168,"height":94},{"url":"https://i.ytimg.com/vi/eb9A6ij3LR0/hqdefault.jpg?sqp=-oaymwEcCNACELwBSFXyq4qpAw4IARUAAIhCGAFwAcABBg== rs=AOn4CLAS5hs3H0aa2lgzAZEkyFjYrFWLrw","width":336,"height":188}]},"title":{"accessibility":{"accessibilityData":{"label":"41. 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