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Many nutritional experts have expressed concern about the high levels of sodium in prepared foods. The following data on sodium content (in milligrams) per frozen meal appeared in the article "Compariso
720
530
800
690
880
1050
340
310
760
300
400
680
780
390
950
520
500
630
480
940
450
990
910
420
850
390
600
Two histograms for these data are shown.
Frequency
10
5
300
550
800
1050
Sodium
Frequency
N W
375
525
675
825
975 1125
Sodium
(a) Do the two histograms give different impressions about the distribution of values?
o Yes. The first histogram gives the impression of a distribution that is negatively skewed, while the second histogram gives an impression of a distribution that is positively skewed.
o No. The two histograms both give the impression of a distribution that is positively skewed.
Yes. The first histogram gives the impression of a distribution that is positively skewed, while the second histogram gives an impression of a distribution that is negatively skewed.
No. The two histograms both give the impression of a distribution that is negatively skewed
(b) Consider the following. (Round your answers to three decimal places.)
Using the first histogram, the proportion of observations that are less than 550 is approximately
Using the second histogram, the proportion of observations that are less than 550 is approximately

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300
5 50
7
800
27
13
Proportion of less then SSo =
$ 100 = 22124
27
= 48. 158%
( 11 )
X
375
si nato
525
675
82 5
975
4
1/ 25
27
proportion of less than 5So is =
1/ x
27
X 10 0
= 40.79 %

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