Inferential vs Descriptive
What is the difference between Inferential and Descriptive Statistics?
Inferential= Guessing/Inferring using data collected
Descriptive= What you know about the data collected
What are the 3 types of data collection methods?
Survey, Experiment, Observational Study
Find the mode of these numbers
7, 12, 1, 5, 7, 8, 12, 7
Find the mode of these numbers
7, 12, 1, 5, 7, 8, 12, 7
Find the range of the data set
72, 75, 82, 68, 70, 81, 78, 90, 86, 63, 74
27
How many weeks are in a year?
52
Descriptive or Inferential?
Calculating the average test score for your class after a math exam.
Descriptive
A school wants to know if students prefer having lunch periods earlier or later in the day. What would be the best data collection method?
Survey
12, 20, 21, 19, 97, 28
20.5
If I am using the calculator to find standard deviation, how do I find variance?
By squaring the standard deviation.
What's the name of YoungBoy's best selling album?
AI YoungBoy 2
Descriptive or Inferential?
Projecting the number of electric cars that will be sold in the country next year.
Inferential
A pharmaceutical company wants to test whether a new medication reduces headaches compared to a placebo (fake pill). What would be the best data collection method?
Experiment
What is the mean of the data set
61, 59, 65, 71, 76, 79, 80, 81, 83, 78, 71, 65
72.42
What is the standard deviation for the daily time spent on social media by a group of teenagers over a week.
120, 95, 150, 80, 135, 110, 165, 90, 140, 105, 130, 75, 155, 100
28.67
If someone was born on February 29, 2000, how old will they be on February 29, 2028?
7 years old
Descriptive or Inferential?
Estimating the average lifespan of a new species based on observations of 50 individuals.
Inferential
A wildlife biologist wants to understand the eating habits of deer in a forest without disturbing them. What would be the best data collection method?
Observational Study
Panama City Beach, Florida is a Spring Break destination. The water temperatures are given below for January to December.
56, 58, 63, 71, 78, 84, 85, 86, 82, 74, 65, 58
Find the Mean and Median of the water temperatures.
Mean= 71.6
Median= 72.5
Find the variance of the wait times for customers at a popular restaurant during dinner hours.
15, 22, 18, 25, 12, 20, 17, 23, 19, 14, 21, 16, 24, 13, 18
16.24
A cowboy rides in to town on Friday. He stays 2 days and leaves on Saturday. How is this possible?
The horse's name is Friday
Descriptive or Inferential?
Determining the most common eye color among students in your grade.
Descriptive
A social media company wants to understand whether their new algorithm makes users happier by analyzing the average happiness rating users give to posts before and after the algorithm change. What would be the best data collection method?
Observational Study
A family tracks their monthly grocery expenses for a year.
$542, $489, $601, $555, $578, $512, $590, $623, $498, $535, $567, $580
What is the average amount that the family spends on groceries?
What is the typical amount that the family spends on groceries?
Average (mean)= $555.83
Typical (median)= $561
The following are the final exam scores for a high school math class
85, 92, 78, 88, 95, 82, 90, 76, 89, 93, 87, 91, 84, 79, 86, 94, 81, 88, 92, 83
Find the standard deviation, variance, and range
Standard deviation= 5.55
Variance= 30.80
What is the correct spelling of
Supercalifragilisticexpialidocious