If Bob gets a 50% on his final history exam, that’s pretty bad right? Well, that depends on what the average exam score was for…

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When we analyze a dataset, we often care about two things: 1. Where the “center” value is located. We often measure the “center” using the…

Suppose we have the following dataset of 20 students along with their final exam scores in three subjects: In this dataset, the subjects are the…

Degrees of freedom Probability Level t-value (right-tailed): 1.79588 t-value (two-tailed): +/- 2.20099

Population mean (μ) Population standard deviation (σ) Raw score 1 (X1) Raw score 2 (X2) Z-Score of X1: -1.00000 Area to the right of X1:…

Confidence Level (%) Estimated True Proportion (leave as 0.5 if unsure) Margin of Error (%) Sample size needed: 468 Sample size = [Z2 * P…

What Are Variables? A subject is a person, place, or thing we’re interested in studying. A variable is an attribute that describes the subject in…

Sample size Number of successess 90% Confidence Interval: (0.471, 0.654) 95% Confidence Interval: (0.454, 0.671) 99% Confidence Interval: (0.420, 0.705)

Sample mean standard deviation Sample size (n) 90% Confidence Interval: (5.896, 28.104) 95% Confidence Interval: (3.770, 30.230) 99% Confidence Interval: (-0.388, 34.388)

Choose an option: Enter summary data Enter raw data Group 1 Sample mean Standard deviation Sample size (n) Group 1 Enter hypothesized mean value One-tailed…