Exhibit 12-1 A card dealing machine deals spades (1),hearts (2),clubs (3),and diamonds (4)at random as if from an infinite deck.In a randomness check,1,600 cards were dealt and counted.The results are shown below. Refer to Exhibit 12.1.To test if the poker dealing machine deals cards at random,the null and alternative hypotheses are:

Question

Exhibit 12-1 A card dealing machine deals spades (1),hearts (2),clubs (3),and diamonds (4)at random as if from an infinite deck.In a randomness check,1,600 cards were dealt and counted.The results are shown below.  Refer to Exhibit 12.1.To test if the poker dealing machine deals cards at random,the null and alternative hypotheses are:

Quizplus · Accepted Answer

The null hypothesis is that the card dealing machine deals cards at random, while the alternative hypothesis is that it does not deal cards at random. In this case, we can use a chi-square test of independence to test whether there is a significant difference between the expected and observed frequencies.

Option A is incorrect because it only indicates the null hypothesis without suggesting the alternative hypothesis.

Option C is incorrect because it does not specify an alternative hypothesis.

Option D is incorrect because it only indicates the alternative hypothesis without suggesting the null hypothesis.

Option B is the correct choice because it provides both the null and alternative hypotheses.

Exhibit 12-1 a Card Dealing Machine Deals Spades (1),hearts (2),clubs