The following is the frequency distribution for the speed of a sample of automobiles traveling on an interstate highway. Speed (mph) Frequency 50 - 54 4 55 - 59 3 60 - 64 2 65 - 69 5 70 - 74 2 75 - 79 5 The standard deviation is .

Standard Deviation is 18.57 .

Step-by-step explanation:

We are given the frequency distribution for the speed of a sample of automobiles traveling on an interstate highway;

  Speed (mph)     Frequency (f)      X         X*f           X -        

     50 - 54                    4                52       208         52 - 65 = -13         169

     55 - 59                    3                57        171           57 - 65 = -8           64

     60 - 64                    2                62        124          62 - 65 = -3            9

     65 - 69                    5                67        335          67 - 65 = 2             4

     70 - 74                     2                72        144           72 - 65 = 7            49

     75 - 79                    5               77       385          77 - 65 = 12          144

                                ∑f = 21                ∑X*f = 1367            

Mean of the data, =

                                       = = 65.09 ≈ 65 .        

Now, Standard deviation, s =

s =   = = 18.57

Therefore, standard deviation is 18.57 .

step-by-step explanation:

cats

the answer is thin because within context, the stanza concludes the and frail tone the people have toward each other, and the fact that it would be thin, makes the most sense compared to "pliable" or "not hard or firm to the touch". hope this , good luck.

step-by-step explanation:

can i have brainliest