Quantitative DM Final Exam

Compute the relative frequency for students who earned an A in the table of grades below. A 10 B 31 C 36 D. 6 Total 83 A) 0.12 B) 0.10 C) 0.83 D) not enough information

A) 0.12

The act of collecting data that are representative of the population data is called? A)random sampling B)sample data C)population data D)sources of data

A) random sampling

The event containing the outcomes belonging to A or B or both is the __________ of A and B. A) union B) Venn diagram C) intersection D) complement

A) union

A quantity of interest that can take on different values is known as an A)Variable B)Parameter C)Sample D)Observation

A)Variable

probability is the___ A) number of successes divided by the number of failures. B) numerical measure of the likelihood that an event will occur C) chance that an event will not happen D) number of successes divided by the standard deviation of the distribution

B) numerical measure of the likelihood that an event will occur

All the events in the sample space that are not part of the specified event are called A) joint events B) the complement of the event C) simple events D) independent events

B) the complement of the event

If covariance between two variables is near 0, it implies that A) a positive relationship exists between the variables B) the variables are not linearly related C) the variables are negatively related D) the variables are strongly related

B) the variables are not linearly related

The correlation coefficient will always take values____. A) greater than 0 B)between -1 and 0 C) between -1 and +1 D) less than -1

C) between -1 and +1

The letter grades (A,B,C,D,F) of business analysis students are recorded by a professor. This variable's classification ____. A)is quantitative data B)cannot be determined C) is categorical data D) is time series data

C) is categorical data

In the graph of the simple linear regression equation, the parameter B0 represents the _____ of the population regression line. A) slope B) x-intercept C) y-intercept D) end-point

C) y-intercept

The amount of time taken by each of 10 students in a class to complete an exam is an example of what type of data? A)cannot be determined B)categorical data C)quantitative data

C)quantitative data

Compute the relative frequencies for the data given in the table below: A 16 B 28 C 33 D. 13 total 90 A) 0.31, 0.14, 0.37, 0.18 B) 0.37, 0.14, 0.31, 0.18 C) 0.16, 0.28, 0.33, 0.13 D) 0.18, 0.31, 0.37, 0.14

D) 0.18, 0.31, 0.37, 0.14