MATH 1442

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= Class Assignment I v Ambey oo . RC )l)RI(rUf'/. 1 e [ 1442 ELEMENTARY STATISTICS . SHOW ALL WORK TO RECEIVE FULL CREDIT I bt ta checkpoint. The results are -rhe H' listed ;ge:':;}' Patrol, using radar, checked the speeds (in mph) of 30 passing mot; orists a 1) Construct a frequency distribution, a relative frequency distribution, and a cumulative n frequency distribution using six classes. : o | ey | pms | 503311 %-55 =17 2 /6=2.3:3 3% | b Y. q 3= LL"IZ"-H b 2 21 4s-47 | 3 T 124 , [H3-50 | @ 7 oA oy 30 , ' F'\v\d\"')\(\g\\ d\\)\de' < un \_'/ 30 2) Construct a frequency histogram, using six classes. 2) 1 315 35S 3US 4ls 495 Lower Clawe
Approximate the mean of the frequency distribution. JeN 0] Midpoint(x) Product (x* Lw?;;:g,@ Fm'; 137 7,37 [ 140144 19 1H2 2,0 145149 5 YT 1o 150-154 2 152 1,064 5 | 155159 18 157 2 3G Jum Jum [ q, YA . 90652 X b U (717 Provide an appropriate response. 4) The mean score of a competency test is 73, with a standard deviation of 4. Use the Empirical Rule to find the percentage of scores Getween 69 and 77.)(Assume the data set has a bell-shaped distribution.) Bell-Shaped Ditribotlon 9974 wiehin 3 devienons. o 9% wien ———= 2 mamdasls devinsions T X=113 g=4 ¢tandard_deviahon 1 owoy : [S) 51107 9 (8%
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