Exam 2: Data Representation

A sample distribution of variable X is as follows: X f 2 2 5 5 6 8 8 3 10 4 12 6 15 1 18 5 20 7 Calculate or draw each of the following for the sample distribution of X. Where possible, use SPSS to generate the data. a. frequency distribution b. cumulative relative frequency distribution c. histogram (ungrouped) d. frequency polygon e. Q₁ f. Q₂ g. Q₃ h. P₁₀ and P₉₀ i. box-and-whisker plot

For a dataset with six values (25, 28, 32, 37, 45, 54, 63), the relative frequency for the value 25 is 18%, the relative frequency for the value 28 is 10%, the relative frequency for the value 32 is 7%, the relative frequency for the value 37 is 26%, and the relative frequency for the value 45 is 11%, and the relative frequency for the value 54 is 16%. What is the cumulative relative frequency for the value 45?

Among the following, what is the preferred method for graphing data pertaining to religious affiliation of a sample?

The letter grades earned by students in a speech class included (with 'A' being the best grade possible and 'F' being the worst grade possible): A, B, C, D, and F. Letter grade of 'A' had a relative frequency of 15%, grade of 'B' had a relative frequency of 20%, grade of 'C' had a relative frequency of 30%, letter grade of 'D' had a relative frequency of 20%, and letter grade of 'F' had a relative frequency of 15%. What is the cumulative relative frequency for a letter grade of 'C'?

For a dataset with five values (65, 72, 80, 88, 95), the relative frequency for the value 65 is 5%, the relative frequency for the value 72 is 15%, the relative frequency for the value 80 is 20%, the relative frequency for the value 88 is 30%, and the relative frequency for the value 95 is 30%. What is the cumulative relative frequency for the value 80?

For a distribution where the 40^th percentile is 80, what is the percentile rank of 80?

For a distribution where the 90^th percentile is 20, what is the percentile rank of 20?

Which of the following statements is correct for a continuous variable?

Among the following, what is the preferred method for graphing data pertaining to eye color of a sample?

Which of the following statements is correct for a continuous variable?

A statistician employed by the Central State Zoo examines data from a random sample of 500 previous visitors. She finds that 322 guests who visited purchased annual passes, 102 purchased multi-day passes, and 76 purchased one-day tickets. What is the relative frequency for visitors who purchased one-day tickets?

For a distribution where the 25^th percentile is 30, what is the percentile rank of 30?

In examining data collected over the past ten years, researchers at Disneyworld find that of 5,000 first time guests: 2,250 visited during the summer months; 675 visited during the fall; 1,300 visited during the winter; and 775 visited during the spring. What is the relative frequency for guests who visited during the winter?

A sample distribution of variable X is as follows: X f 100 4 110 8 115 2 120 6 125 10 130 5 135 7 140 3 145 1 Calculate or draw each of the following for the sample distribution of X. Where possible, use SPSS to generate the data. a. frequency distribution b. cumulative relative frequency distribution c. histogram (ungrouped) d. frequency polygon e. Q₁ f. Q₂ g. Q₃ h. P₁₀ and P₉₀ i. box-and-whisker plot

Given a variable that is interval or ratio in measurement scale, which of the following is correct?

For a dataset with six values (25, 28, 32, 37, 45, 54, 63), the relative frequency for the value 25 is 18%, the relative frequency for the value 28 is 10%, the relative frequency for the value 32 is 7%, the relative frequency for the value 37 is 26%, and the relative frequency for the value 45 is 11%, and the relative frequency for the value 54 is 16%. What is the cumulative relative frequency for the value 28?

Which of the following statements is correct for a continuous variable?

One-hundred guests during a university's Parent Day are asked who it is they are visiting while they're on campus. Thirty indicate that they are visiting their son, forty indicate they are visiting their daughter, twenty indicate that they are visiting a grandchild, and ten indicate that they are visiting two children. What is the relative frequency for guests who are visiting their daughter?

Which of the following statements is correct for a continuous variable?

A sample distribution of variable X is as follows: X f 75 8 78 5 79 7 81 3 83 6 85 5 86 10 88 5 90 3 Calculate or draw each of the following for the sample distribution of X. Where possible, use SPSS to generate the data. a. frequency distribution b. cumulative relative frequency distribution c. histogram (ungrouped) d. frequency polygon e. Q₁ f. Q₂ g. Q₃ h. P₁₀ and P₉₀ i. box-and-whisker plot