Doctor Who Statistics Project

An Analysis of the IMDB User Review Star Ratings of the Last 30

Doctor Who Episodes as of October 24, 2014

By: Miranda Dotson

Titles and IMDB Star Ratings Let's Kill Hitler 8.2 The Angels Take

Manhattan 9.0 Deep Breath 8.0

Night Terrors 7.2 The Snowmen 8.5 Into the Dalek 8.0

The Girl Who Waited 8.5 The Bells of Saint John 8.0 Robot of Sherwood 7.3

The God Complex 8.0 The Rings of Akhaten 7.2 Listen 9.1

Closing Time 7.8 Cold War 7.3 Time Heist 8.0

The Wedding of River Song

8.8 Hide 7.9 The Caretaker 7.7

Asylum of the Daleks 8.8 Journey to the Centre of the TARDIS

7.7 Kill the Moon 7.5

Dinosaurs on a Spaceship

7.6 The Crimson Horror 7.5 Mummy on the Orient Express

8.7

A Town Called Mercy 7.5 Nightmare in Silver 7.7 Flatline 8.8

The Power of Three 7.7 The Name of the Doctor

9.2 In the Forest of the Night 10

Frequency DistributionClass Limits

Frequency Relative Frequency

Class Midpoint

7.0 – 7.6 8 26.7% 7.3

7.7 – 8.2 12 40% 7.95

8.3 – 8.8 6 20% 8.55

8.9 – 9.4 3 10% 9.15

9.5 – 10.0 1 3.3% 9.75

Frequency Histogram for Doctor Who IMDB Star Ratings

7.0 - 7.6 7.7 - 8.2 8.3 - 8.8 8.9 - 9.4 9.5 - 10.00

2

4

6

8

10

12

14

Star Rating of Episodes

Fre

qu

ency

Measure of Center, Measure of Variation, and Measure of Relative Standing

• Mean – 8.11• Median - 8• Mode - 8• Range – 2.8• Standard Deviation – 0.69

5 Number Summary

• Minimum - 7.2• Q1 - 7.6

• Median - 8• Q3 – 8.7

• Maximum - 10

Star Rating for the Entire Series Comparison

Star Rating for the Entire Series

8.9• Z score – 1.14• Percentile – 86.6

Outliers• In The Forest• Newest Episode• Only 5 Ratings, all were 10• Next Highest Rating was 9.2• Class Width is 0.6

The End