MGT 512 Quiz 2.1

Compute the relative frequencies for students who earned an A shown in the table of grades below. A = 10 B = 31 C = 36 D = 6 Total = 83

0.12

Compute the relative frequencies for the data given in the table below: A = 16 B = 28 C = 33 D = 13 Total = 90

0.18, 0.31, 0.37, 0.14

Find the relative frequency of group 4, given that group 1 = 0.15, group 2 = 0.32, and group 3 = 0.29.

0.24

Compute the geometric mean of the following data on growth factors of an invest for 10 years. 1.10, 0.50, 0.70, 1.21, 1.12, 1.16, 1.11, 1.13, 1.22

1.0148

The scores of a sample of students in a Math test are 20, 15, 19, 21, 22, 12, 17, 14, 24, 16 and in a Stat test are 16, 12, 19, 17, 22, 14, 20, 21, 24, 15, 13. Compute the mean scores for the Stat test.

17.5

The scores of a sample of students in a Math test are 20, 15, 19, 21, 22, 12, 17, 14, 24, 16 and in a Stat test are 16, 12, 19, 17, 22, 14, 20, 21, 24, 15, 13. Compute the mean scores for the Math test.

18

Consider a sample of the waiting times (in minutes at the billing counter in a grocery store to be 15, 24, 18, 15, 21, 20, 15, 22, 19, 16, 15, 22, 20, 15 and 21. Compute the median.

19

Compute the coefficient of variation for the following sample data. 32, 41, 36, 24, 29, 30, 40, 22, 25, 37

21.36%

Compute the median of the following data. 32, 41, 36, 24, 29, 30, 40, 22, 25, 37

31

Consider the data below. What percentage of students scored grade C? A = 16 B = 28 C = 33 D = 13 Total = 90

37%

Compute the mean of the following data. 56, 42, 37, 29, 45, 51, 30, 25, 34, 57

40.6

What is the mode of the data set given below. 35, 47, 65, 47, 22

47

Use technology to compute the standard deviation for the following sample data. 32, 41, 36, 24, 29, 30, 40, 22, 25, 37

6.75

A sample of 13 adult males' eights are listed below. 70, 27, 71, 70, 69, 73, 69, 68, 70, 71, 67, 71, 74 Find the range of the data.

7

A sample of 13 adult males' heights are listed below. 70, 72, 71, 70, 69, 73, 69, 68, 70, 71, 67, 71, 74 Find the range of the data

7

To total samples size is 40. If the relative frequency group 4 is .24, but is the frequency of group 4.

96

---- act(s) as a representative of the population.

A sample

In a survey of patients in a local hospital, 62.42% of the respondents indicated that the health care providers needed to spend more time with each patient. What is the population being studies?

All patients in a local hospital

A student willing to participate in a debate competition is required to fill out a registration form. State whether each of the following information about the participant provides categorical or quantitative data. a. What is your date of birth? b. Have you participated in any debate competition previously? c. If yes, in how many debate competitions have you participated so far? d. Have you won any of the competitions? e. If yes, how many have you won?

Categorical, Categorical, Quantitative, Categorical, Quantitative

_____ are collected from several entities at the same point in time.

Cross-sectional data

Which of the following are necessary to be determined to define the classes for a frequency distribution with quantitative data?

Number of nonoverlappping bins, width of each bin, and bin limits

The data on the time taken by 10 students in a class to complete an exam is an example of what type of data?

Quantitative data

Which of the following gives the proportion of items in each bin?

Relative frequency

The ----- is a point estimate of the population mean for the variable of interest.

Sample mean

When working with large spreadsheets with many rows of data, it can be helpful to _____ the data to better find, view, or manage subsets of data.

Sort and Filter

The --- shows the number of data items with values less than or equal to the upper class limit of each class.

cumulative frequency distribution

The variance is based on the

deviation about the mean

The variance is based on the

deviation about the mean.

In a(n) ___, one or more variables are identified and controlled or manipulated so that the data can be obtained about how they influence the variable of interest identified first.

experimental study

A summary of data that show the number of observations in each of several non-overlapping bins is called a(n)

frequency distribution

A ___ is a graphical summary of data previously summarized in a frequency distribution.

histogram

The letter grades of business analysis students is recorded by a professor (4=A, 3=B, 2=C, 1=D). This variable's classification

is categorical data

The letter grades of business analysis students is recorded by the professor (4=A, 3=B, 2=C, 1=D). This variable's classification

is categorical data

A set of values corresponding to a set of variables is defined as a(n)

observation

The data collected from the customers in restaurants about the quality of food is an exampled of a(n)

observational study

The difference between the largest and the smallest data values is the

range

The simplest measure of variability is the

range

Data collected from several entities over a period of time (minutes, hours, days, etc.) are called...

time series data

The quantity of interest that can take on different values is known as a(n)

variable

The difference in a variable measure over observations (time, customers, items, etc) is known as

variation