CL fi xi fixi 10 – 15 8 12.5 100 8 9.5 – 15.5

16 - 21 10 18.5 185 18 15.5 – 21.5

22 - 27 8 24.5 196 26 21.5 – 27.5

28 - 33 4 30.5 122 30 27.7 – 33.5

n = 30 ∑ =603

n/2 = 30/2 = 15 i = 6

What is the Mean ?

(Use up to one decimal place in writing your answer).

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Lems1. the following data set represents the scores on intelligence quotient(iq) examinations of 40 sixth-grade students at a particular school: 114, 122, 103, 118, 99, 105, 134, 125, 117, 106, 109, 104, 111, 127,133, 111, 117, 103, 120, 98, 100, 130, 141, 119, 128, 106, 109, 115,113, 121, 100, 130, 125, 117, 119, 113, 104, 108, 110, 102(a) present this data set in a frequency histogram.(b) which class interval contains the greatest number of data values? (c) is there a roughly equal number of data in each class interval? (d) does the histogram appear to be approximately symmetric? if so, about which interval is it approximately symmetric?

Choose the right classification of 5x + 3x^4 - 7x^3 + 10 by number terms and he degree 1. third degree polynomial 2. fourth degree polynomial 3. sixth degree polynomial 4. first degree binomial