Neco Model Questions Vol1 2018 Mathematics Question 32
Practice objective / multiple choice question 32 from the 2018 Neco Model Questions Vol1 Mathematics examination.
A set of 40 observations is grouped into the following class intervals (kg) and frequencies:\n\n\(40\!\!\!\!-\!\!\!\!49\): 5\n\(50\!\!\!\!-\!\!\!\!59\): 12\n\(60\!\!\!\!-\!\!\!\!69\): 15\n\(70\!\!\!\!-\!\!\!\!79\): 6\n\(80\!\!\!\!-\!\!\!\!89\): 2\n\n(a) Identify the modal class.\n(b) Using the class mid‑points as assumed values, estimate the mean of the data.\n(c) Compute the estimated standard deviation (to one decimal place).\n(d) If a new observation of \(85\) kg is added, what is the new estimated mean (to one decimal place)?
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This is Neco Model Questions Vol1 2018 Mathematics Question 32. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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