F&M L3 Flashcards
What is the main purpose of inferential statistics?
To make conclusions about a population based on a sample.
Which of the following statements best describes inferential statistics?
C. It uses data from a sample to make predictions or generalizations about a population.
Why do we use a sample in inferential statistics instead of collecting data from an entire population?
b) It saves time and resources
What is a key risk when using a sample for inferential statistics?
c) The sample may not represent the population accurately.
What does a confidence interval in inferential statistics represent?
The range within which the population parameter is expected to lie.
What is the primary purpose of a chi-square goodness of fit test?
B.)To determine if the sample distribution match the expected distribution
Which of the following scenarios would be appropriate for using a chi-square test of independence?
Evaluating the relationship between gender and color
In a one-sample t-test, what is being compared?
The mean of a sample to a known population mean
What does a t-test primarily assess?
Differences between means of groups
What are the two types of chi-square test?
GOODNESS OF FIT TEST
TEST OF INDEPENDENCE
A psychologist wants to understand the combined effect of age, stress levels, and income on overall life satisfaction. She aims to predict life satisfaction based on these three factors. Which statistical technique is appropriate?
Multiple Regression
In a study on the relationship between exercise frequency and body fat percentage, the goal is to analyze the strength and direction of this relationship between the two variables. What statistical technique should be used?
Pearson Correlation
A business analyst is interested in predicting sales revenue based on the amount spent on advertising. He is only considering advertising expenditure as the predictor variable. Which statistical technique should he use?
Simple Regression
