Stats Chapter 4 Homework
Describe the differences between a histogram and a dot plot. When might a dot plot be better than a histogram? Multiple Choice Histogram is better for large data sets and dot plot is better for small data sets. Histogram is better for small data sets and dot plot is better for large data sets.
Histogram is better for large data sets and dot plot is better for small data sets.
Study the table given below. x-Value 10 8 9 11 13 y-Value 6 2 6 5 7 x-Value 11 10 7 7 11 y-Value 6 5 2 3 7 Multiple Choice Smaller values of x seem to be associated with larger values of y. Larger values of x seem to be associated with larger values of y. Larger values of x seem to be associated with smaller values of y.
Larger values of x seem to be associated with larger values of y.
Dot plots are most useful to quickly visualize the dispersion and center of a distribution. True False
True
The following chart reports the number of cell phones sold at a big-box retail store for the last 26 days. 4,9,14,19 a. What are the maximum and the minimum numbers of cell phones sold in a day? The lowest value is ____ and the highest is ____. b. Using the median, what is the typical number of cell phones sold? Typical number of cell phones sold _________
a. lowest 4 highest 19 b. median 12
Listed below are the commissions earned ($000) last year by a sample of 15 sales representatives at Furniture Patch Inc. $4.2 $6.0 $7.3 $10.6 $13.0 $13.6 $14.2 $15.3 $16.8 $17.4 $18.6 $22.3 $36.6 $43.2 $79.2 a. Determine the mean, median, and the standard deviation. (Round your answers to 2 decimal places.) b. Determine the coefficient of skewness using Pearson's method. (Round your answer to 3 decimal places.) c. Determine the coefficient of skewness using the software method. (Round your answer to 3 decimal places.)
a. mean 21.22 median 15.30 standard deviation 19.20 b. coefficient of skewness 0.925 c. coefficient of skewness 2.329
The American Society of PeriAnesthesia Nurses (ASPAN; www.aspan.org) is a national organization serving nurses practicing in ambulatory surgery, preanesthesia, and postanesthesia care. The organization consists of the 40 components listed below. State/Region Membership Alabama 45 Arizona 466 Maryland, Delaware, DC 599 Connecticut 134 Florida 629 Georgia 326 Hawaii 93 Illinois 474 Indiana 368 Iowa 160 Kentucky 258 Louisiana 250 Michigan 508 Massachusetts 370 Maine 72 Minnesota, Dakotas 337 Missouri, Kansas 169 Mississippi 73 Nebraska 122 North Carolina 630 Nevada 138 New Jersey, Bermuda 669 Alaska, Idaho, Montana, Oregon, Washington 911 New York 1,101 Ohio 911 Oklahoma 225 Arkansas 61 California 1,257 New Mexico 77 Pennsylvania 657 Rhode Island 41 Colorado 313 South Carolina 283 Texas 1,216 Tennessee 226 Utah 42 Virginia 381 Vermont, New Hampshire 127 Wisconsin 395 West Virginia 50 a. Find the mean, median, and standard deviation of the number of members per component. (Round your answers to 2 decimal places.) b-1. Find the coefficient of skewness, using the software method. (Round your answer to 2 decimal places.) b-2. What do you conclude about the shape of the distribution of component size? Mild positive skewness Mild negative skewness c Determine the first and third quartiles. Do not use the method described by Excel. (Round your answers to 2 decimal places.) d-1. What are the limits for outliers? (Round your answers to the nearest whole number. Negative amounts should be indicated by a minus sign.) d-2. Are there any outliers? One Two Three Four Zero rev: 06_28_2018_QC_CS-130241 This is the last question in the assignment. To submit, use Alt + S. To access other questions, proceed to the question map button.Next Visit question mapQuestion8of8Total8 of 8Prev
a. mean 379.10 median 298 Standard deviation 326.87 b-1 1.23 b-2 mild postive skewness c 123.25 576.25 d-1 -566 to 1256 d-2 one
The box plot shows the undergraduate in-state tuition per credit hour at four-year public colleges. 0 150 300 450 600 750 900 1050 1200 1350 1500 a. Estimate the median. b. Estimate the first and third quartiles. c. Determine the interquartile range. d. Beyond what point is a value considered an outlier? e. Identify any outliers and estimate their values. If there are no outliers select "None". 1,500 1,300 800 None f. Is the distribution symmetrical or positively or negatively skewed? Symmetric skewed Positively skewed Negatively skewed
a. 450 b. 300, 750 c. 450 d. less than 0 more than 1425 e. 1500 f. positive
