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statlect.com

https://statlect.com· First analyzed 31 May 2026· Updated 31 May 2026
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statlect.com
Desktop screenshot of statlect.com
Mobile screenshot of statlect.com
Mobile

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Hosting Provider

PrivateSystems Networks GA

IP Address

207.7.90.46

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Atlanta, United States

ASN

AS63410

Organization

PrivateSystems Networks GA

Server

Apache

CDN

Cloudflare

WAF

Cloudflare

Nameservers

leif.ns.cloudflare.com.gina.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
388 ms10%
Speed Index
504 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
369 KB
19 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
PrivateSystems Networks GA
CDN
Cloudflare

Technology Stack

4 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Fonts

1
Google Fonts

Web Servers

1
Apache

SEO Analysis

C65/100
18
7
1
Meta Tags8/15
Content11/12
Headings8/8
Technical18/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile3/4
Indexability3/3
S
statlect.comstatlect.com

Statlect, the digital textbook | Probability, statistics, matrix al...

Online book containing hundreds of lectures on probability, statistics and matrix algebra. Ideal for self-study.

Title truncated.
Title Length72 chars

Recommended: 50-60 chars (~416px / 580px)

Description Length112 chars

Recommended: 120-160 chars

Issues (1)

  • • Title is too long (72 chars, ~416px). Will be truncated in search results.

8 issues found

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Crawlability

Sitemap

Type: standard

360 URLs

robots.txt

5 rules

Sitemap reference found

Local SEO

Local Search Readiness

3/100
Poor
1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

D41/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
0/25
Citation
10/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:10%
Words:979
Token eff.:Optimal
Sections/1K:10.2

Structured Data

Microdata

Citation Readiness

Opening Summary25w
Descriptive Headingsavg 2.4w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
C
66/100
8
Passed
4
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
11/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
10/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
1/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
3 recommendations
  • •Accessibility recommendation preview...
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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
53/100
A
46 mg
CO₂e / view
368.7 KB
Page Weight
90%
Cleaner Than
New Visitor
52 mg
vs
Returning (cached)
26 mg
Annual (10K/mo)
5.5 kg
Emission Segments
Data Center
10 mg
Network
11 mg
Device
25 mg
Resource Breakdown
Images
353.7 KB
Fonts
2.1 KB
HTML
12.6 KB
Other
300 B
Green Hosting Not Verified
PrivateSystems Networks GA
3 recommendations
  • •Carbon footprint recommendation preview...
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F

Security Score

21%Critical
Interactive

HTTPS

No WAF

45d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

17.04.2026

Valid Until

16.07.2026

Subject Alternative Names (8)

cpanel.statlect.comcpcalendars.statlect.comcpcontacts.statlect.commail.statlect.comstatlect.comwebdisk.statlect.comwebmail.statlect.comwww.statlect.com

SHA-256 Fingerprint

F5:F8:A3:0F:57:2F:EF:2D:E0:FB:E8:FE:F6:51:00:D8:27:12:57:1B...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
cache-control
🟡 3 Hours(max-age=10800)
content-encoding
📦 Gzip(gzip)
content-length
12561
content-type
text/html
date
Sun, 31 May 2026 20:25:55 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (1)

statlect.com

Domain Information

statlect.com

Domain Age
15y 11m

Created

10.06.2010

Expires

10.06.2030

Last Updated

17.11.2021

Registrar

NameSilo, LLC

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
D
55/100
Mobile Friendly
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1, maximum-scale=1.0
4 recommendations
  • •Mobile compatibility recommendation preview...
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Typography & Readability

Open Sans

WCAG Partial
69/100
Readability
/30
18/30

18px · LH 1.67

Hierarchy
/20
17/20

1.78x ratio · ✓ H1→H6

WCAG
/25
19/25

1.87:1 min contrast

Performance
/25
15/25

1 font · 1 req

Heading Font

Open Sans

Sans32px

Body Font

Open Sans

Sans18px

Contrast Ratio

1.87:1

1 issue

Reading Comfort

~36 CPL

Narrow lines
32px
h1
28px
h2
24px
h3
18px
p

✅ Excellent readability: 18px body text is ideal for all devices.

❌ Very complex text: Flesch score 17/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 1.9:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

GGoogle FontsFlesch 17

Color Palette

8 unique colors
4.01:1 AA Large Light
#ffffff
Background· 91.20000000000002%
#798084
Other· 1.1%
#a5bbbf
Primary· 1.8%
#4ca5b8
Secondary· 1.6%
#89a5ae
Secondary· 1.3%
#e9eeee
Border· 0.9%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

2 Resources

1
Scripts
1
Styles
1
Async
0
Defer

Top Script Sources

googletagmanager.com(1)

Website Identity

statlect.com

15 years old
Location detected: 🇺🇸 United Statesvia ip
NameSilo, LLC

Sponsored

Last analyzed: 31 May 2026 at 20:26

Historical Analysis & Change Tracking

statlect.com Technology Stack - Built With Google Fonts, Google Analytics, Google Analytics 4, Apache | StackOptic | StackOptic