Mathematics, 10.02.2020 22:42 xxaurorabluexx

The true sample mean and sample standard deviation of the data are 67.8 and 18.8, respectively, rounded to one decimal place. Explain why the grouped-data formulas generally yield only approximations to the sample mean and sample standard deviation for non-single-value grouping.
Choose the correct answer below:
A. It is the result of counting data values more than once for grouped data and only once for non-grouped data.
B. It is the result of intermediate round off error in the calculations for grouped data.
C. It is the result of counting data values only once for grouped data and more than once for non-grouped data.
D. It is the result of using a class mark or midpoint to approximate data values rather than using the raw data.

Answers: 2

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 21:00, datgamer13

Mr. zimmerman invested $25,000 in an account that draws 1.4 interest, compouneded annually. what is the total value of the account after 15 years

Answers: 1

continue

Mathematics, 21.06.2019 21:40, bella7524

Which statement is true about a number and its additive inverse? a. their product is always one. b. their sum is always one. c. they are always reciprocals of each other. d. their sum is always zero.

Answers: 1

continue

Mathematics, 21.06.2019 23:30, bhopainting

Simplify (8x2 − 1 + 2x3) − (7x3 − 3x2 + 1). −5x3 + 11x2 − 2 5x3 − 11x2 + 2 x3 + 2x2 + x3 x3 − 2x2 − x3

Answers: 1

continue

Mathematics, 22.06.2019 00:00, nyctvinny8290

Two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: what is the approximate distance, in feet, between the two poles? 6.93 feet 8.66 feet 12.32 feet 15.59 feet

Answers: 1

continue

You know the right answer?

The true sample mean and sample standard deviation of the data are 67.8 and 18.8, respectively, roun...