The parallel boxplots below display the bag weights of two different brands, A and B, of granola. Brand A Brand BH 47 47.5 48 48.5 49 49.5 50 50.5 51 51.5 52 52.5 Weights (Grams) Which statement best compares the variability of the distributions for the bag weights? The bag weights for brand A are more variable than the bag weights for brand B. The bag weights for brand A have less variability than the bag weights for brand B. The bag weights for brand B are not as spread out as the bag weights for brand A. The bag weights for brand A are higher, on average, than the bag weights for brand B. O00 O

3. The data shows the number of students who got scores in Algebra. Given the frequency distribution below, find the mode of the grouped data. Scores in Algebra 75-79 6. 70-74 7. 65-69 2. 60-64 8. 12 55-59 7. 50-54 10 45-49 8. 40-44

Which one of the following summary statistics best matches the data on the abundance of various bird species shown here? Frequency (No. species) 25 20 15 10 5 0 0 Mean = Mean = Mean = 100 200 300 400 500 600 Abundance (No. individuals) 75 individuals, s.d. = 122 individuals 300 individuals, s.d. = 14871 individuals 10 individuals, s.d. = 10 individuals Mean = 10 individuals, s.d. = 14871 individuals Mean 75 individuals, s.d. = 14871 individuals

The number of miles per gallon​ (MPG) for 56 foreign cars is given in the following frequency table. Find the​ mean, median, and mode for these data.   MPG 19 20 21 22 23 24 25 26 27 28 29 30   Frequency 1 7 2 4 4 7 8 8 4 3 5 3         Question content area bottom Part 1 Find the mean. Select the correct choice below and fill in any answer boxes in your choice.     A. The mean is approximately enter your response here   . ​(Type an integer or decimal rounded to the nearest tenth as​ needed.)   B. There is no mean for these data. Part 2 Find the median. Select the correct choice below and fill in any answer boxes in your choice.     A. The median is enter your response here   . ​(Type an integer or decimal rounded to the nearest tenth as​ needed.)   B. There is no median for these data. Part 3 Find the​ mode(s). Select the correct choice below and fill in any answer boxes in your…

A city wants to know if a new advertising campaign to make citizens aware of the dangers of driving after drinking has been effective. The accompanying table shows the number of drivers who have been stopped with more alcohol in their systems than the law allows for each day of the week in the week before and the week a month after the campaign starts. Assume that the data from each population is Normally distributed. Complete parts a through i below. A. Are the data paired? Explain. B. Compute the mean difference C. Compute the standard deviation of the differences. D. Compute the standard error of the mean difference. E. Find the value of the​ t-statistic. F. How many degrees of freedom does the​ t-statistic have? G. Is the alternative​ one- or​ two-sided? Explain. H. What is the​ P-value associated with this​ t-statistic? Assume that the other assumptions and conditions for inference are met.

The Focus Problem at the beginning of this chapter asks you to use a sign test with a 10% level of significance to test the claim that the overall temperature distribution of Madison, Wisconsin, is different (either way) from that of Juneau, Alaska. The monthly average data (in °F) are as follows. Month Jan. Feb. March April May June Madison 17.8 21.4 31.8 46.9 57.1 67.8 Juneau 22.8 27.5 31.8 38.6 46.2 52.7 Month July Aug. Sept. Oct. Nov. Dec. Madison 71.9 69.5 60.8 51.7 35.6 22.2 Juneau 55.6 54.9 49.3 41.1 32.5 26.3 (a) What is the level of significance? (b) Compute the sample test statistic. (Use 2 decimal places.) (c) Find the P-value of the sample test statistic

Approximate the mean of the grouped data. Round to the nearest whole number.   Phone calls (per day) Frequency 8-11 26 12-15 25 16-19 44 20-23 13 24-27 38   ...   Question content area right Part 1   A.16 16   B.29 29   C.18 18   D.17 17   E.19

Given the scatter plot below, which of the following describes the strength and direction of the data? 10 Weak negative correlation Strong negative correlation Strong positive correlation Weak positive correlation