To compare the median salaries at Speedy Shipping Co. and Northern Parcel Express based on the provided histogram descriptions, we can make the following observations:
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Speedy Shipping Co. Histogram: The x-axis ranges from 0 to 300,000 in increments of 60,000. This indicates a wider range of salaries, with the potential for higher salaries impacting the median.
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Northern Parcel Express Histogram: The x-axis is more compressed, with maximum salaries reaching only 185,000. This could suggest that salaries at this company are lower overall.
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Skewness: The question mentions the data being skewed left for Northern Parcel Express, which would generally indicate that the lower salaries are affecting the median more than the higher salaries. Skewness influences the median, as medians can be higher in left-skewed distributions.
Based on this information, it's reasonable to conclude:
- Northern Parcel Express may have a skewed distribution that impacts its median differently from Speedy Shipping Co.'s more balanced distribution.
- Given that Speedy Shipping Co. has a wider range of salaries with potentially higher maximums, it is likely that their overall median salary would be higher as well.
Thus, the best statement is: "Speedy Shipping Co. has the greater median salary because the overall salaries are higher, and the data is not as far skewed to the right as Northern Parcel Express."