A gambler complained about the dice. They seemed to be loaded! The dice were taken ott the table and tested one at a time. One die was rolled 300 times and the tollowing trequencies were recorded. 1 Outcome Observed frequency O 2 3 4 5 6 63 42 62 31 49 53 Do these data indicate that the die is unbalanced? Use a 1% level of significance. Hint: If the die is balanced, all outcomes should have the same expected frequency. (a) What is the level of significance? State the null and alternate hypotheses. O Ho: The distributions are the same. H,: The distributions are different. O H,: The distributions are different. H: The distributions are different. O Ho: The distributions are different. H,: The distributions are the same. O Họ: The distributions are the same. H,: The distributions are the same. (b) Find the value of the chi-square statistic for the sample. (Round the expected frequencies to at least three decimal places. Round the test statistic to three decimal places.) Are all the expected frequencies greater than 5? O Yes O No What sampling distribution will you use? O chi-square O normal O uniform O Student's t What are the degrees of freedom? (c) Estimate the P-value of the sample test statistic. O P-value > 0.100 O 0.050 < P-value < 0.100 O 0.025 < P-value < 0.050 O 0.010 < P-value < 0.025 O 0.005 < P-value < 0.010 O P-value « 0.005 (d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis of independence? O since the P-value > a, we fail to reject the null hypothesis. O since the P-value > a, we reject the null hypothesis. O since the P-value s a, we reject the null hypothesis. O Since the Pavalue < fail to reiect the null bynotbecis

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A gambler complained about the dice. They seemed to be loaded! The dice were taken off the table and tested one at a time. One die was rolled 300 times and the following frequencies were recorded.

Outcome	1	2	3	4	5	6
Observed frequency O	63	42	62	31	49	53

Do these data indicate that the die is unbalanced? Use a 1% level of significance. Hint: If the die is balanced, all outcomes should have the same expected frequency.

A gambler complained about the dice. They seemed to be loaded! The dice were taken off the table and tested one at a tıme. One die was rolled 300 times and the following frequencies were recorded.
Outcome
1
2
3
4
5
6
Observed
frequency O
63
42
62
31
49
53
Do these data indicate that the die is unbalanced? Use a 1% level of significance. Hint: If the die is balanced, all outcomes should have the same expected frequency.
(a) What is the level of significance?
State the null and alternate hypotheses.
O Ho: The distributions are the same.
H,: The distributions are different.
O H: The distributions are different.
H,: The distributions are different.
O Ho: The distributions are different.
H,: The distributions are the same.
O Ho: The distributions are the same.
H,: The distributions are the same.
(b) Find the value of the chi-square statistic for the sample. (Round the expected frequencies to at least three decimal places. Round the test statistic to three decimal places.)
Are all the expected frequencies greater than 5?
O Yes
O No
What sampling distribution will you use?
O chi-square
O normal
O uniform
O Student'st
What are the degrees of freedom?
(c) Estimate the P-value of the sample test statistic.
O P-value > 0.100
O 0.050 < P-value < 0.100
O 0.025 < P-value < 0.050
O 0.010 < P-value < 0.025
O 0.005 < P-value < 0.010
O P-value < 0.005
(d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis of independence?
O Since the P-value > a, we fail to reject the null hypothesis.
O Since the P-value > a, we reject the null hypothesis.
O Since the P-value s a, we reject the null hypothesis.
O Since the P-value s a, we fail to reject the null hypothesis.

(d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis of independence?
O Since the P-value > a, we fail to reject the null hypothesis.
O Since the P-value > a, we reject the null hypothesis.
O Since the P-value s a, we reject the null hypothesis.
O ince the P-value s a, we fail to reject the null hypothesis.
(e) Interpret your conclusion in the context of the application.
O At the 1% level of significance, the evidence is sufficient to conclude that the distribution of observed outcomes for the die is different from the expected distribution of a fair die.
O At the 1% level of significance, the evidence is insufficient to conclude that the distribution of observed outcomes for the die is different from the expected distribution of a fair die.

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