Exam 2: Describing Data: Frequencydistributions and Graphic Presentation

Refer to the following price of jeans are recorded to the nearest dollar: The first two class midpoints are $62.50 and $65.50. What is the class interval?

When a class interval is expressed as: 100 to under 200 (i. Observations with values of 100 are included from the class frequency. (ii. Observations with values of 200 are included in the class frequency. (iii) Observations with values of 200 are excluded from the class frequency.

(i. A table showing the number of observations that have been grouped into each of several classes Is called a frequency distribution. (ii. When classes in a frequency table are constructed so that data will fit into only one category, it is Called mutually exclusive. (iii) The suggested class interval based on number of observations given the data ranges from 100 To 200 with 50 observations is 20

One rule that must always be followed in constructing frequency distributions is that _______.

A student was interested in the cigarette smoking habits of college students and collected data From an unbiased random sample of students. The data is summarized in the following table: Why is the table NOT a frequency table?

How many firms export less than $14 million in product?

(i. Bar charts are useful for showing the percent that various components compose of the total. (ii. Simple bar charts may be constructed either horizontally or vertically. (iii) A frequency polygon is ideal for showing the trend or sales of income over time.

What is the class interval for the table of commissions above?

Statistics Canada report 2010 results in the following chart. Is the data quantitative or qualitative? What is the name of the table shown?

Refer to the following price of jeans are recorded to the nearest dollar: The first two class midpoints are $62.50 and $65.50. What are the class limits for the lowest class?

Given the following stem and leaf plot, determine the largest value in the data set.

For the distribution of ages above, what is the relative class frequency for the lowest class?

The following ages (rounded to the nearest whole year) of employees at a large company that were Grouped into a distribution with class limits: 20 up to 30 30 up to 40 40 up to 50 50 up to 60 60 up to 70 (i. The class limits for the class 50 up to 60 class are 50 and 58. (ii. The midpoint for the class 40 up to 50 is 45. (iii) The class interval is 10.

The following ages (rounded to the nearest whole year) of employees at a large company that were Grouped into a distribution with class limits: 20 up to 30 30 up to 40 40 up to 50 50 up to 60 60 up to 70 (i. The class limits for the class 50 up to 60 class are 50 and 58. (ii. The midpoint for the class 40 up to 50 is 40. (iii) The class interval is 9.

Which is the best (most informative and useful) graphical display of the Average Weekly Earnings Health Care in Canada over the years 2008 to 2012?

The following represent the ages of students in a class: 19, 23, 21, 19, 19, 20, 22, 31, 21, 20 If a stem and leaf plot were to be developed from this, how many leaves would there be off the Second stem?

What is the following table called?

A group of 100 students were surveyed about their interest in a new International Studies program. The survey asked students about their interest in the program in terms of high, medium, or low. 30 Students responded high interest; 50 students responded medium interest; 20 students responded Low interest. What is the relative frequency of students with high interest?

Consider the following stem and leaf plot: Suppose that you decided to develop a frequency distribution from this plot. What would be the lower limit of the first class?

The chart below can be best described as