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Given in the question that, There are $38$slots on an American roulette wheel. $2$green, $18$red, $18$black Managers at one casino keep track of statistics from a random sample of American roulette wheel spins. The findings are shown in the one-way table below.

Alternative Hypothesis: $H_1$: The hypothesis we're attempting to prove.

$H_0$: The null hypothesis is the inverse of the alternative hypothesis.

The hypotheses here would be

$H_0$: In localid="1650697371079" $200$rails, there is no statistically significant difference between the expected and observed count of red, black, and green slots.

Versus

$H_1$: In localid="1650697374873" $200$trails, the expected and observed count of red, black, and green slots varies significantly.

Expected count for each colour slot.

When the roulette wheel is fair, we have an equal probability of landing on any of the 38 slots.

As a result, the odds of earning a red slot in 200 trials are $18/38脳200=94.74.$

In the same way, the odds of getting black slot in 200 trials are$18/38脳200=94.74$

The green slot costs$2/38脳200=10.52.$

Expected frequencies or counts are what they're called.

These can be found in the table below.