## Description

**MATH 302 Quiz 1 – Question and Answers**

**Part 1 of 3**

- What type of sampling is being employed if the population is divided into economic classes and a sample is chosen from each economic class to be surveyed?
- Which of the following statistics is not a measure of central location?
- Gender and State are examples of which type of data?
- The amount of time needed to run the Boston marathon is an example of which type of variable?
- The mode is best described as the
- Given the following boxplot where m is the median value, what statement could be made about the distribution of the data?
- The median can also be described as:
- Suppose that a histogram of a data set is approximately symmetric and “bell shaped”. Approximately what percent of the observations are within two standard deviations of the mean?
- Suppose that a histogram of a data set is approximately symmetric and “bell shaped”. Approximately what percent of the observations are within one standard deviation of the mean?
- Since the population is always larger than the sample, the population mean:
- A population includes:
- Find the z-score for each student and indicate which one has a better relative position. An Art Major earned a grade of 46 on an exam with = 50 and s = 5; A Theater Major earned a grade of 70 on an exam with = 75 and s = 7.

**Part 2 of 3**

- Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), “E” or “e” (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where “a” and “b” need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. The following data represent the number of children in a sample of 10 families from Chicago: 4, 2, 1, 1, 5, 3, 0, 1, 0, and 2. Compute the mean number of children. Place your answer, rounded to two decimal places, in the blank. For example, 3.45 would be a legitimate entry. 1.70
- Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), “E” or “e” (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where “a” and “b” need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. The histogram below represents scores achieved by 250 job applicants on a personality profile. What percentage of the job applicants scored between 30 and 40? Place your answer in the blank, rounded to 2 decimal places. Do not use a percentage sign (%). For example, 44.44 would be a legitimate answer.
- Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), “E” or “e” (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where “a” and “b” need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. A statistics professor has just given a final examination in his statistical inference course. He is particularly interested in learning how his class of 40 students performed on this exam. The scores are shown below.

- Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), “E” or “e” (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where “a” and “b” need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. The following data represent the number of children in a sample of 10 families from Chicago: 4, 2, 1, 1, 5, 3, 0, 1, 0, and 2. Compute the median number of children. Place your answer, rounded to two decimal places, in the blank. For example, 3.45 would be a legitimate entry. 1.50

- Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), “E” or “e” (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where “a” and “b” need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. The histogram below represents scores achieved by 250 job applicants on a personality profile. How many job applicants scored above 50? Place your answer in the blank. Do not use any stray symbols. For example, 123 would be a legitimate answer.
- Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), “E” or “e” (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where “a” and “b” need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. The histogram below represents scores achieved by 250 job applicants on a personality profile. Half of the job applicants scored below what value?Place your answer in the blank. Do not use any stray symbols. For example, 123 would be a legitimate answer.

**Part 3 of 3**

- Categorical variables can be classified as either discrete or continuous.
- Age, height, and weight are examples of numerical data.