75 80 95 85 80 Find the mean median mode and range median mo

75, 80, 95, 85, 80 Find the mean, median, mode and range. median: mode: range What is the probability of score being over 80? What are the odds of a score being less than 85? Find the standard deviation, round it to the nearest whole number. Set up the normal distribution curve.

Solution

Ans1.

Mean=(75+80+95+85+80)/5

=415/5

=83

The median is the middle value in the numerical value

median= 80

mode

The mode is the number that is repeated more often than any other, so 80 is the mode

Range=highest value-lowest value

=95-75=20

Ans 5: standard deviation

To calculate the standard deviation of those numbers:

Mean =83

subtract the mean with each number

i.e (75-83)²=-8²=64,(80-80)²=0 and.....so on

we get 64,0,225,25,0

add these numbers we get 314

now divide it by no. of score i.e 5 we get 62.8

square root of 62.8= 7.924=8 (rounding off) is the standard deviation