A survey in 19401940 asked 18001800 adult Americans whether they believed government spending should increase to help the economy. 48%48\% said yes. The margin of error was 44 percentage points with 95%95\% confidence. We are 90%90\% to 100%100\% confident that 48%48\% of adult Americans in 19401940 supported increased government spending. Which of the following is a reasonable interpretation of the survey results?

We are 95%95\% confident that between 44%44\% and 52%52\% of adult Americans in 19401940 supported increased government spending

We are 90%90\% to 100%100\% confident that 48%48\% of adult Americans in 19401940 supported increased government spending

We are 95%95\% confident that exactly 48%48\% of adult Americans in 19401940 supported increased government spending

We are 95%95\% confident that between 48%48\% and 52%52\% of adult Americans in 19401940 supported increased government spending

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1. Intro to Stats and Collecting Data(0)

Intro to Stats
(0)

Levels of Measurement
(0)

Intro to Collecting Data
(0)

Sampling Methods
(0)

2. Describing Data with Tables and Graphs(0)

Visualizing Qualitative vs. Quantitative Data
(0)

Frequency Distributions
(0)

Histograms
(0)

Bar Graphs and Pareto Charts
(0)

Pie Charts
(0)

Frequency Polygons
(0)

Dot Plots
(0)

Stemplots (Stem-and-Leaf Plots)
(0)

Time-Series Graph
(0)

3. Describing Data Numerically(0)

Mean
(0)

Median
(0)

Mode
(0)

Standard Deviation
(0)

Interpreting Standard Deviation
(0)

Percentiles & Quartiles
(0)

Boxplots
(0)

4. Probability(0)

Basic Concepts of Probability
(0)

Complements
(0)

Addition Rule
(0)

Multiplication Rule: Independent Events
(0)

Introduction to Contingency Tables
(0)

Multiplication Rule: Dependent Events
(0)

Bayes' Theorem
(0)

Fundamental Counting Principle
(0)

Counting
(0)

5. Binomial Distribution & Discrete Random Variables(0)

Discrete Random Variables
(0)

Binomial Distribution
(0)

Poisson Distribution
(0)

Hypergeometric Distribution
(0)

6. Normal Distribution and Continuous Random Variables(0)

Uniform Distribution
(0)

Standard Normal Distribution
(0)

Non-Standard Normal Distribution
(0)

7. Sampling Distributions & Confidence Intervals: Mean(0)

Sampling Distribution of the Sample Mean and Central Limit Theorem
(0)

Introduction to Confidence Intervals
(0)

Confidence Intervals for Population Mean
(0)

Determining the Minimum Sample Size Required
(0)

8. Sampling Distributions & Confidence Intervals: Proportion(0)

Sampling Distribution of Sample Proportion
(0)

Confidence Intervals for Population Proportion
(0)

Chi Square Distribution
(0)

Confidence Intervals for Population Variance
(0)

9. Hypothesis Testing for One Sample(0)

Steps in Hypothesis Testing
(0)

Performing Hypothesis Tests: Means
(0)

Performing Hypothesis Tests: Proportions
(0)

Performing Hypothesis Tests: Variance
(0)

Critical Values and Rejection Regions
(0)

Link Between Confidence Intervals and Hypothesis Testing
(0)

Type I & Type II Errors
(0)

10. Hypothesis Testing for Two Samples(0)

Two Proportions
(0)

Two Means - Unknown, Unequal Variance
(0)

Two Means - Unknown, Equal Variance
(0)

Two Means - Known Variance
(0)

Two Means - Matched Pairs (Dependent Samples)
(0)

Two Variances and F Distribution
(0)

11. Correlation(0)

Scatterplots & Intro to Correlation
(0)

Correlation Coefficient
(0)

12. Regression(0)

Linear Regression & Least Squares Method
(0)

Residuals
(0)

Coefficient of Determination
(0)

Inferences for Slope
(0)

Prediction Intervals
(0)

Quadratic Regression
(0)

13. Chi-Square Tests & Goodness of Fit(0)

Goodness of Fit Test
(0)

Contingency Tables
(0)

Independence Tests
(0)

Homogeneity Tests
(0)

14. ANOVA(0)

Introduction to ANOVA
(0)

Multiple Comparisons: Tukey Test
(0)

Multiple Comparisons: Tukey-Kramer Test
(0)

Multiple Comparisons: Bonferoni Test
(0)

Two-Way ANOVA
(0)

8. Sampling Distributions & Confidence Intervals: Proportion

Confidence Intervals for Population Proportion

8. Sampling Distributions & Confidence Intervals: Proportion

Confidence Intervals for Population Proportion: Videos & Practice Problems

Video Lessons Practice Worksheet

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Problem 111Multiple Choice

A survey in $1940$ asked $1800$ adult Americans whether they believed government spending should increase to help the economy. $48 percent sign$ said yes. The margin of error was $4$ percentage points with $95 percent sign$ confidence. We are $90 percent sign$ to $100 percent sign$ confident that $48 percent sign$ of adult Americans in $1940$ supported increased government spending. Which of the following is a reasonable interpretation of the survey results?

We are $95 percent sign$ confident that between $44 percent sign$ and $52 percent sign$ of adult Americans in $1940$ supported increased government spending

We are $90 percent sign$ to $100 percent sign$ confident that $48 percent sign$ of adult Americans in $1940$ supported increased government spending

We are $95 percent sign$ confident that exactly $48 percent sign$ of adult Americans in $1940$ supported increased government spending

We are $95 percent sign$ confident that between $48 percent sign$ and $52 percent sign$ of adult Americans in $1940$ supported increased government spending

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