Question 1

An outlier of a data set is determined from the lower and upper quartile

Accepted Answer

A) True 
 B)False

Question 2

An electrical component for one of the main products your company produces is specified to have an electrical impedance of 2.15 ohms.However, the manufacturing process is not perfect and there is some variation on the actual impedance of these components.A recent statistical study indicated that in fact, the impedances are normally distributed with a mean impedance of 2.15 ohms and a standard deviation of 0.05 ohms.When the impedance exceeds 2.25 ohms, the product malfunctions so that component must be rejected and replaced by one whose impedance is within the acceptable limit.If you need 1350 usable components, how many components should you order?

Accepted Answer

A) 1608 
B) 1422 
C) 1421 
D) 1417 
E) 1384 
A) 1608 
B) 1422 
C) 1421 
D) 1417 
E) 1384

Question 3

If a large data set can be assumed to be normally distributed, then a business analyst could apply the normality rule to determine a range with approximately 60% of the data.

Accepted Answer

A) True 
 B)False

Question 4

If the median of a distribution is greater than mean, then the distribution is skewed to the left.

Accepted Answer

A) True 
 B)False

Question 5

A box and whisker plot is determined from the mean, the smallest and the largest values, and the lower and upper quartile.

Accepted Answer

A) True 
 B)False

Question 6

By comparing the mean and median of a variable in a large data set, a business analyst can assess the variability within the values of that variable.

Accepted Answer

A) True 
 B)False

Question 7

The most frequently occurring value in a set of data is called the mode.

Accepted Answer

A) True 
 B)False

Question 8

A commuter travels many miles to work each morning.She has timed this trip 5 times during the last month.The time (in minutes)required to make this trip was 38, 33, 36, 47, and 41.What is the standard deviation for these sample data?

Accepted Answer

A) 28.5 
B) 11 
C) 22.8 
D) 5.34 
E) 4.77 
A) 28.5 
B) 11 
C) 22.8 
D) 5.34 
E) 4.77

An outlier of a data set is determined from the lower and upper quartile

If a large data set can be assumed to be normally distributed, then a business analyst could apply the normality rule to determine a range with approximately 60% of the data.

If the median of a distribution is greater than mean, then the distribution is skewed to the left.

A box and whisker plot is determined from the mean, the smallest and the largest values, and the lower and upper quartile.

By comparing the mean and median of a variable in a large data set, a business analyst can assess the variability within the values of that variable.

The most frequently occurring value in a set of data is called the mode.

A commuter travels many miles to work each morning.She has timed this trip 5 times during the last month.The time (in minutes)required to make this trip was 38, 33, 36, 47, and 41.What is the standard deviation for these sample data?

Introduction to Statistics and Business Analytics

Visualizing Data With Charts and Graphs

Probability

Discrete Distributions

Continuous Distributions

Sampling and Sampling Distributions

Statistical Inference: Estimation for Single Populations

Statistical Inference: Hypothesis Testing for Single Populations

Statistical Inferences About Two Populations

Analysis of Variance and Design of Experiments

Simple Regression Analysis and Correlation

Multiple Regression Analysis

Building Multiple Regression Models

Time-Series Forecasting and Index Numbers

Analysis of Categorical Data

Nonparametric Statistics

Statistical Quality Control

Decision Analysis

Filters

Exam 3: Descriptive Statistics

An outlier of a data set is determined from the lower and upper quartile

If a large data set can be assumed to be normally distributed, then a business analyst could apply the normality rule to determine a range with approximately 60% of the data.

If the median of a distribution is greater than mean, then the distribution is skewed to the left.

A box and whisker plot is determined from the mean, the smallest and the largest values, and the lower and upper quartile.

By comparing the mean and median of a variable in a large data set, a business analyst can assess the variability within the values of that variable.

The most frequently occurring value in a set of data is called the mode.

A commuter travels many miles to work each morning.She has timed this trip 5 times during the last month.The time (in minutes)required to make this trip was 38, 33, 36, 47, and 41.What is the standard deviation for these sample data?

Introduction to Statistics and Business Analytics

Visualizing Data With Charts and Graphs

Probability

Discrete Distributions

Continuous Distributions

Sampling and Sampling Distributions

Statistical Inference: Estimation for Single Populations

Statistical Inference: Hypothesis Testing for Single Populations

Statistical Inferences About Two Populations

Analysis of Variance and Design of Experiments

Simple Regression Analysis and Correlation

Multiple Regression Analysis

Building Multiple Regression Models

Time-Series Forecasting and Index Numbers

Analysis of Categorical Data

Nonparametric Statistics

Statistical Quality Control

Decision Analysis

Filters