Question 1

If b0 = 32 and b1 = −4 and the predicted value of y is 14, what is the value of x?

Accepted Answer

A)  −24.0 
B)  18.0 
C)  4.5 
D)  .56 
A)  −24.0 
B)  18.0 
C)  4.5 
D)  .56

Question 2

A random sample of 60 students in the business statistics course answered a survey on the average number of hours they spent on statistics each week. Unfortunately, the original data were lost and all that remains is the frequency table below. From these data, calculate the estimated sample standard deviation.

Accepted Answer

4.714
 @#IMG-DLM& Sample variance = (131

Question 3

Researchers wish to study fuel consumption rates based on speed. The data from the test car at 10 speeds are below.   It can be shown that for these data:   = 41.9,   = 17.8,   = 2352.9,   = 267.6,   (   -   ) = −270.2.
Calculate the sample covariance.

Accepted Answer

A)  −270.2 
B)  −30.02 
C)  −27.02 
D)  −74.58 
E)  −82.86 
A)  −270.2 
B)  −30.02 
C)  −27.02 
D)  −74.58 
E)  −82.86

Question 4

Which of the following is influenced the least by the occurrence of extreme values in a sample?

Accepted Answer

A)  mean 
B)  median 
C)  geometric mean 
D)  weighted mean 
A)  mean 
B)  median 
C)  geometric mean 
D)  weighted mean

Question 5

In a statistics class, 10 scores were randomly selected, with the following results: 74, 73, 77, 77, 71, 68, 65, 77, 67, 66. What is the 10th percentile?

Accepted Answer

A)  65.5 
B)  67.3 
C)  66.75 
D)  73.85 
E)  77.0 
A)  65.5 
B)  67.3 
C)  66.75 
D)  73.85 
E)  77.0

If b₀ = 32 and b₁ = −4 and the predicted value of y is 14, what is the value of x?

Researchers wish to study fuel consumption rates based on speed. The data from the test car at 10 speeds are below. It can be shown that for these data: = 41.9, = 17.8, = 2352.9, = 267.6, ( - ) = −270.2. Calculate the sample covariance.

Which of the following is influenced the least by the occurrence of extreme values in a sample?

In a statistics class, 10 scores were randomly selected, with the following results: 74, 73, 77, 77, 71, 68, 65, 77, 67, 66. What is the 10th percentile?

An Introduction to Business Statistics and Analytics

Descriptive Statistics and Analytics: Tabular and Graphical Methods

Probability and Probability Models

Predictive Analytics I: Trees, K-Nearest Neighbors, Naive Bayes,

Discrete Random Variables

Continuous Random Variables

Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Chi-Square Tests

Simple Linear Regression Analysis

Multiple Regression and Model Building

Predictive Analytics Ii: Logistic Regression, Discriminate Analysis,

Time Series Forecasting and Index Numbers

Nonparametric Methods

Decision Theory

Filters

Exam 3: Descriptive Statistics and Analytics: Numerical Methods

If b0 = 32 and b1 = −4 and the predicted value of y is 14, what is the value of x?

Researchers wish to study fuel consumption rates based on speed. The data from the test car at 10 speeds are below. It can be shown that for these data: = 41.9, = 17.8, = 2352.9, = 267.6, ( - ) = −270.2. Calculate the sample covariance.

Which of the following is influenced the least by the occurrence of extreme values in a sample?

In a statistics class, 10 scores were randomly selected, with the following results: 74, 73, 77, 77, 71, 68, 65, 77, 67, 66. What is the 10th percentile?

An Introduction to Business Statistics and Analytics

Descriptive Statistics and Analytics: Tabular and Graphical Methods

Probability and Probability Models

Predictive Analytics I: Trees, K-Nearest Neighbors, Naive Bayes,

Discrete Random Variables

Continuous Random Variables

Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Chi-Square Tests

Simple Linear Regression Analysis

Multiple Regression and Model Building

Predictive Analytics Ii: Logistic Regression, Discriminate Analysis,

Time Series Forecasting and Index Numbers

Nonparametric Methods

Decision Theory

Filters

If b₀ = 32 and b₁ = −4 and the predicted value of y is 14, what is the value of x?