The annual earnings of 25 people with a high school diploma and 16 people with an associate’s degree are shown in the table. Can you conclude that there is a difference in the mean annual earnings based on level of education? Use α = 0.05. Assume the populations are normally distributed and the population variances are not equal.

5.Identify the following as being discrete or continuous data. Explain.a. The average number of pets was 1.823b. The puppy weighed 2 pounds

You want to know if male green darner dragonflies (Anax junius) are territorial so you collect data on how many dragonflies you find per square meter of shoreline around a 15 hectare pond. You collect data from 24 random square meter plots and count the number of male green darners in each plot. The data from each plot is below. Using the equation in the lab instructions, what is the Variance to Mean ratio? number of male green darners/square meter 8. 7 6. 6. 6. 7. 8 8. 81 8. 7 7 8. 6. Answer: 0.12

II On Friday night, the owner of Chez Pierre in downtown Chicago noted the amount spent for dinner for 28 four-person tables. 95 103 109 114 113 107 10 OLT 104 08 134 124 105 84 176 115 69 68 95 108 61 091 87 128 95 61 150 52 136 E Click here for the Excel Data File (a) Find the mean, median, and mode. (Round your answers to 2 decimal places.) Descriptive Statistics Data Count Mean Median Mode (b) Are the data symmetric or skewed? If skewed, which direction? O Symmetric O Skewed left O Skewed right Graw 11!H < Prev 10 of 19 ....... 2 Type here to search < įXƏN

What is the median?

The total cost for a production process is $600 minus two times the number of units produced. The mean and variance of the number of produced are 200 and 20, respectively. So, the mean and variance of the total cost are O A. 600, 200 O B. 1000, 560 O C. 200, 8O O D. 400, 180

The side-by-side dotplot below displays the arm spans, Which statement is NOT true? in centimeters, for two classes. The mean arm span appears to be similar for the two Arm Span (cm) Class A Class B classes. 8. 3 1 9 65 42 1 14 3 The arm spans for Class A have less variability than the arm spans for Class B. 5 6 0 22233 5 67 0 3 The arm spans for Class B have more variability than the arm spans for Class A. 16 99 5 16 The arm spans for Class A are roughly symmetric, while those for Class B are skewed left. 1 0 17 9965 17 320 18 0 12 6 6 18 6. 36 19 20 Key: 15|5 = 155 cm LO5 CO (ON7 O CO O C

The table available below shows the weights (in pounds) for a sample of vacuum cleaners. The weights are classified according to vacuum cleaner type. At a = 0.10, can you conclude that at least one mean vacuum cleaner weight is different from the others? Click the icon to view the vacuum cleaner weight data. Let μBU, BLU, and μTC represent the mean weights for bagged upright, bagless upright, and top canister vacuums respectively. What are the hypotheses for this test? A. Ho: At least one of the means is different. Ha: MBUHBLUPTC B. Ho: "BU HBLU HTC # Ha: MBUHBLUPTC C. Ho: MBUHBLU = HTC Ha: At least one of the means is different. D. Ho: MBU - HBLU = μTC Ha: HBU #BLU HTC What is the test statistic? F = 12.56 (Round to two decimal places as needed.) What is the P-value? P-value = 0.000624 (Round to three decimal places as needed.)

The figure below shows relative frequency histogram for 50 employees working in a small construction company classified according to their years of experience. While x-axis represents the class midpoints of experience years, y-axis represents relative frequency for the employees. The value of variance for the years of :experience is between Relative Frequency for Employees 0.45 04 0.35 0.3 0.25 0.2 0.15 0.1 0.05 7.5 Relative Frequency Chart 13.5 19.5 Class Midpoints of Experience Years 25.5 32-34 O 40-42 O 12-14 O 20-22 O 52-54 O

For major league baseball teams, is there a relationship between player payrolls and gate money? Here are data for each of the American League teams for the year 2000. The variable x denotes the 2000 player payroll (in millions of dollars), and the variable y denotes the mean attendance (in thousands of fans) for the 81 home games that year. The data are plotted in the Figure 1 scatter plot. Also given is the product of the player payroll and the mean attendance for each of the fourteen teams. (These products, written in the column labelled "xy", may aid in calculations.) Anaheim Baltimore Boston Chicago White Sox Cleveland Detroit Kansas City Minnesota Mean Player payroll, x attendance, y (in $1,000,000s) thousands) New York Yankees Oakland Seattle Tampa Bay Texas Toronto Send data to calculator 59.2 80.5 97.0 42.3 90.5 68.6 31.8 23.5 114.3 43.0 69.9 65.2 72.7 66.8 25.56 40.74 31.98 24.07 42.72 31.23 20.74 13.09 39.88 21.36 38.89 18.27 34.57 22.47 xy x 1513.152 3279.57 3102.06…