calculate the sample standard deviation and sample variance for the following frequency distribution of final exam scores in a statistics class if necessary around one more decimal place than the largest number of decimal places given in the data?

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First of all, we have to convert the classintervals in continuous form.{:[d=61-60],[d=1]:}Adding (d)/(2)=0.5 in the upper class limit of each class and subbracting the same. from the lower linit of each classwhere,{:[ bar(x)=(1)/(N)sumx_(i)],[ ... See the full answer