1. Draw a frequency polygon corresponding to the ogive curve given below. 100 90 80 70 60 50 40 30 20 10 0. -25 -15 -5 15 25 2. The of a dataset is 40 and the coefficient of range is 0.4. Find the largest and range smallest values in the data.
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- We have a sample of 103 observations, which range in value from 25 to 67. Which of the following proposals would allow us to obtain a frequency data for the data? a) 5 classes of width 8 with maximum value 70 b) 5 classes of width 8 with maximum value 67 c) 6 classes of width 7, with minimum value 25 d) 6 classes of width 7, with minimum value 20In a frequency distribution table if the last class interval is 18– 34, then the class size will be: a. 10b. 7c. 8d. 91. Create the frequency table of the data.
- The following is a sample of prices, rounded to the nearest cent, charged per gallon of standard unleaded gasoline in the San Francisco Bay area in June 1997. 3.88, 3.90, 3.93, 3.90, 3.93, 3.96, 3.88, 3.94, 3.96, 3.88, 3.94, 3.99, 3.98 Represent these data in (a) a frequency table; (b) a relative frequency line graph.2) A researcher is interested in studying if male smokers and female smokers smoke a different number of cigarettes each day. She takes a sample of 10 male smokers and 10 female smokers from a nearby motorcycle club by asking the first 10 smokers of each gender she encountered. Their results are recorded below. Male 18 25 30 16 24 32 15 27 19 15 Female 12 15 36 30 12 18 34 22 10 12 Answer the following: a. Create appropriate graph(s) that can be used to compare the samples. Using the graph(s) to explain: does it appear that the number of cigarettes smoked by each gender are different? b. To run a formal test, which test will you run and which distribution will you use? Explain why for each. Are there any concerns you have about using the results of this test? c. Write the following hypothesis in symbols: Null Hypothesis: The average number of cigarettes smoked by male and female smokers is the same. H0: ________________________…2.3 The National Safety Council reports the following age breakdown for licensed drivers in the United States. Source: Bureau of the Census, Statistical Abstract of the United States 2009, p. 682. Age (Years) Licensed Drivers (Millions) Under 20 10.72 20–under 25 16.84 25–under 35 40.78 35–under 45 45.59 45–under 55 36.70 55–under 65 23.32 65 or over 28.76 Identify the following for the 35–under 45 classes: (a) Frequency (b) upper and lower limits (c) width and (d) midpoint.
- Consider the following frequency table representing the distribution of hours students study for an exam in a week. Hours Students Study for an Exam in a Week Class Frequency 8–16 12 17–25 11 26–34 11 35–43 9 44–52 13 Copy Data Step 1 of 2 : Determine the lower class boundary for the fifth class.(a) The following are the marks of the Statistics subject obtained by 40 students in a final examination. Develop a frequency table, use 4 as lower limit of the first class. 63 20 10 25 5 35 30 65 15 41 51 15 30 55 60 45 50 8 10 40 20 30 34 4 25 56 48 9 16 44 70 24 7 9 36 30 30 40 65 50 Construct a frequency distribution table using the Sturge’s rule.