Chi-Square Test of Independence | Contingency Table | Hypothesis Test

Chi-Square Test of Independence - Contingency Table
A brief explanation of the chi square test of Independence.

00:00 Contingency Table
00:56 Hypothesis Test
01:08 Null & Alternative Hypothesis
01:47 Test Statistic
02:18 Calculating Expected Values
03:43 Calculating chi-square statistic
04:13 Degrees of freedom
04:31 Critical value
04:51: P-values, Decisions and Conclusions

[VGAMAV]

I love you sir. i am studying for statistics exam and it is unbelievable how many topics you can explain impeccably under 10 mins. All the best.

[lbognini]

Good job. We do appreciate all the effort put in realizing all those videos and sharing them with the community. 👍🏽

I was wonderring if we should not change the way we teach, mainly maths and stats.
Today, real value-added is in having people understand the intuition. The why and when. Not the how that is easily done by a computer.

I think more emphasis should be put on explaining with plain words what each row total, column total means. Explain what figures should look like if AI usage had nothing to do with age then the other way arround.

Focussing too much on formulas, numbers and mathematical/statistical terms do scare people away.
Among those who will follow till the end, some may have great scores in their exams but not really be able to effectively use khi2 test in the real life.

The notions of Expected and Observed values are key here and deserved more focus. Once we understand and feel them, khi2 becomes just kind of a common sense.

[globalshoot]

Duplex Textile Ltd, makes executive and standard dresses. An executive dress requires 60
minutes for cutting, 50 minutes for sewing, 40 minutes for finishing and 15 minutes for
inspection and packaging. A standard dress requires 42 minutes for cutting, 30 minutes for
sewing, 60 minutes for finishing and six minutes for inspection and packaging. The firm
employs 35 tailors who spend a maximum of 630 hours for cutting, 600 hours for sewing, 708
hours for finishing and 135 hours for inspection and packaging every week. The profit
contribution per dress is Sh. 1500 for the executive dress and Sh. 1350 for the standard dress.
Formulate as a linear programming problem and solve.
Need your assistance on this. Please help.