Statistics Using Technology Unit 4 – Lecture
Statistics
Notes
Using
_ Study
Technology
Material.pdf
Unit 4 – Lecture
Statistics
Notes
Using
_ Study
Technology
Material.pdf
Unit 4 – Lecture Notes _ Study Material.pdf
Statistics Using
Technology Unit 4
– Lecture Notes /
Study Material
Statistics Using Technology Unit 4 – Lecture
Statistics
Notes
Using
_ Study
Technology
Material.pdf
Unit 4 – Lecture
Statistics
Notes
Using
_ Study
Technology
Material.pdf
Unit 4 – Lecture Notes _ Study Material.pdf
, Statistics Using Technology Unit 4.pdf Statistics Using Technology Unit 4.pdf Statistics Using Technology Unit 4.pdf
What are the two reasons that observed sample values 1. The null hypothesis is correct and the differences are just random
are different from hypothesized values? sample fluctuations.
2. The null hypothesis is incorrect and we are seeing evidence of this.
What test would you use if you have data for letter We would have data for one qualitative variable (letter grade) that has 5
grades and want to see if it differs from some stated categories (A, B, C, D, F) so we would use the Chi-Square Goodness-of-Fit
distribution of grades? Test with df = 5 - 1 = 4
What value of the chi-square statistic do we expect to If the null hypothesis is true, then all of the observed values would be close
see if the null hypothesis is true? to the expected values and we would get a value of chi-square near 0.
What is the form of the null hypothesis for a Chi-Square H₀: Data are consistent with a specified distribution of percentages in
Goodness-of-Fit Test? categories
What does the p-value represent in a hypothesis test it is always the area in the right tail to the right of the chi-square test
using the chi-square distribution? statistic
What hypothesis test would you use if you want to test You would have data for two qualitative variables (time of day and letter
for an association between the time of day you take a grade) so you would use the Chi-Square Independence Test
class (morning, afternoon, evening) and letter grade?
Statistics Using Technology Unit 4.pdf Statistics Using Technology Unit 4.pdf Statistics Using Technology Unit 4.pdf
Statistics
Notes
Using
_ Study
Technology
Material.pdf
Unit 4 – Lecture
Statistics
Notes
Using
_ Study
Technology
Material.pdf
Unit 4 – Lecture Notes _ Study Material.pdf
Statistics Using
Technology Unit 4
– Lecture Notes /
Study Material
Statistics Using Technology Unit 4 – Lecture
Statistics
Notes
Using
_ Study
Technology
Material.pdf
Unit 4 – Lecture
Statistics
Notes
Using
_ Study
Technology
Material.pdf
Unit 4 – Lecture Notes _ Study Material.pdf
, Statistics Using Technology Unit 4.pdf Statistics Using Technology Unit 4.pdf Statistics Using Technology Unit 4.pdf
What are the two reasons that observed sample values 1. The null hypothesis is correct and the differences are just random
are different from hypothesized values? sample fluctuations.
2. The null hypothesis is incorrect and we are seeing evidence of this.
What test would you use if you have data for letter We would have data for one qualitative variable (letter grade) that has 5
grades and want to see if it differs from some stated categories (A, B, C, D, F) so we would use the Chi-Square Goodness-of-Fit
distribution of grades? Test with df = 5 - 1 = 4
What value of the chi-square statistic do we expect to If the null hypothesis is true, then all of the observed values would be close
see if the null hypothesis is true? to the expected values and we would get a value of chi-square near 0.
What is the form of the null hypothesis for a Chi-Square H₀: Data are consistent with a specified distribution of percentages in
Goodness-of-Fit Test? categories
What does the p-value represent in a hypothesis test it is always the area in the right tail to the right of the chi-square test
using the chi-square distribution? statistic
What hypothesis test would you use if you want to test You would have data for two qualitative variables (time of day and letter
for an association between the time of day you take a grade) so you would use the Chi-Square Independence Test
class (morning, afternoon, evening) and letter grade?
Statistics Using Technology Unit 4.pdf Statistics Using Technology Unit 4.pdf Statistics Using Technology Unit 4.pdf
