or the campaign cost values in this sample, 6.8 million dollars is more extreme than 4.6 million dollars is, that is, 6.8 is farther from the sample mean campaign cost than 4.6 is. How would the 95% prediction interval for the mean percentage increase in sales when the campaign cost is 4.6 million dollars compare to the 95% prediction interval for the mean percentage increase in sales when the campaign cost is 6.8 million dollars? The intervals would be identical. The interval computed from a campaign cost of 4.6 million dollars would be narrower and have a different center. The interval computed from a campaign cost of 4.6 million dollars would be wider and have a different center. The interval computed from a campaign cost of 4.6 million dollars would be wider but have the same center. The interval computed from a campaign cost of 4.6 million dollars would be narrower but have the same center