+0  
 
0
485
1
avatar+588 

Employees were asked how many times per week they exercised. The frequency table shows the results of the survey.

 

Number of times exercised per week: 0  1  2  3  4  5  6  7  8

Frequency: 5  10  2  9  33  12  15  3  1

 

Find: (b) P(x < 4) (c) P(x = 6) (d) P(x (greater than or equal to sign) 5) 

adore.nuk  Feb 17, 2018
 #1
avatar+87334 
+2

 

(b)  P( x < 4)  =     ( 5 + 10 + 2 + 9 )  / ( 5 + 10 + 2 + 9 + 33 + 12 + 15 + 3 + 1 ) =  13/45

 

(c)  P(x  = 6)  =  15 / (5 + 10 + 2 + 9 + 33 + 12 + 15 + 3 + 1)  =  1/6

 

(d) P( x ≥ 5 ) =  (12+ 15 + 3 + 1) /  (5 + 10 + 2 + 9 + 33 + 12 + 15 + 3 + 1) =  7/30

 

 

cool cool cool

CPhill  Feb 17, 2018

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