Apaint manufacturer made a modification to a paint to speed up its drying time. independent simple random samples of 11 cans of type a (the original paint) and 9 cans of type b (the modified paint) were selected and applied to similar surfaces. the drying times, in hours, were recorded. the summary statistics are as follows. type a type b x1 = 76.3 hrs x2 = 65.1 hrs s1 = 4.5 hrs s2 = 5.1 hrs n1 = 11 n2 = 9 the following 98% confidence interval was obtained for μ1 - μ2, the difference between the mean drying time for paint cans of type a and the mean drying time for paint cans of type b: 4.90 hrs < μ1 - μ2 < 17.50 hrs what does the confidence interval suggest about the population means?

Name and describe the three most important measures of central tendency. choose the correct answer below. a. the mean, sample size, and mode are the most important measures of central tendency. the mean of a data set is the sum of the observations divided by the middle value in its ordered list. the sample size of a data set is the number of observations. the mode of a data set is its highest value in its ordered list. b. the sample size, median, and mode are the most important measures of central tendency. the sample size of a data set is the difference between the highest value and lowest value in its ordered list. the median of a data set is its most frequently occurring value. the mode of a data set is sum of the observations divided by the number of observations. c. the mean, median, and mode are the most important measures of central tendency. the mean of a data set is the product of the observations divided by the number of observations. the median of a data set is the lowest value in its ordered list. the mode of a data set is its least frequently occurring value. d. the mean, median, and mode are the most important measures of central tendency. the mean of a data set is its arithmetic average. the median of a data set is the middle value in its ordered list. the mode of a data set is its most frequently occurring value.