A report provided the following information on gender of smartphone users for representative samples of young people age 15 to 24 in several different countries. Country Percent Female Percent Male United States 53% 47% Spain 38% 62% Italy 37% 63% India 19% 81% (a) Suppose the sample sizes were 1000 for the United States and for India and 500 for Spain and Italy. Complete the following two-way table by entering the observed counts. Country Female Male United States Spain Italy India (b) Carry out a hypothesis test to determine if there is convincing evidence that the gender proportions are not the same for all four countries. Use a significance level of 0.05. State the null and alternative hypotheses. H0: The gender proportions of smartphone users are not the same for all countries. Ha: The gender proportions of smartphone users are the same for all countries.H0: The gender proportions of smartphone users are the same for all countries. Ha: The gender proportions of smartphone users are not the same for all countries. H0: Gender and country are not independent. Ha: Gender and country are independent.H0: Gender and country are independent. Ha: Gender and country are not independent. Calculate the test statistic. (Round your answer to two decimal places.) χ2 = What is the P-value for the test? (Use a statistical computer package to calculate the P-value. Round your answer to four decimal places.) P-value =
A report provided the following information on gender of smartphone users for representative samples of young people age 15 to 24 in several different countries. Country Percent Female Percent Male United States 53% 47% Spain 38% 62% Italy 37% 63% India 19% 81% (a) Suppose the sample sizes were 1000 for the United States and for India and 500 for Spain and Italy. Complete the following two-way table by entering the observed counts. Country Female Male United States Spain Italy India (b) Carry out a hypothesis test to determine if there is convincing evidence that the gender proportions are not the same for all four countries. Use a significance level of 0.05. State the null and alternative hypotheses. H0: The gender proportions of smartphone users are not the same for all countries. Ha: The gender proportions of smartphone users are the same for all countries.H0: The gender proportions of smartphone users are the same for all countries. Ha: The gender proportions of smartphone users are not the same for all countries. H0: Gender and country are not independent. Ha: Gender and country are independent.H0: Gender and country are independent. Ha: Gender and country are not independent. Calculate the test statistic. (Round your answer to two decimal places.) χ2 = What is the P-value for the test? (Use a statistical computer package to calculate the P-value. Round your answer to four decimal places.) P-value =
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 1C
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A report provided the following information on gender of smartphone users for representative samples of young people age 15 to 24 in several different countries.
Country | Percent Female | Percent Male |
---|---|---|
United States | 53% | 47% |
Spain | 38% | 62% |
Italy | 37% | 63% |
India | 19% | 81% |
(a)
Suppose the sample sizes were 1000 for the United States and for India and 500 for Spain and Italy. Complete the following two-way table by entering the observed counts.
Country | Female | Male |
---|---|---|
United States | ||
Spain | ||
Italy | ||
India |
(b)
Carry out a hypothesis test to determine if there is convincing evidence that the gender proportions are not the same for all four countries. Use a significance level of 0.05.
State the null and alternative hypotheses.
H0: The gender proportions of smartphone users are not the same for all countries.
Ha: The gender proportions of smartphone users are the same for all countries.H0: The gender proportions of smartphone users are the same for all countries.
Ha: The gender proportions of smartphone users are not the same for all countries. H0: Gender and country are not independent.
Ha: Gender and country are independent.H0: Gender and country are independent.
Ha: Gender and country are not independent.
Ha: The gender proportions of smartphone users are the same for all countries.H0: The gender proportions of smartphone users are the same for all countries.
Ha: The gender proportions of smartphone users are not the same for all countries. H0: Gender and country are not independent.
Ha: Gender and country are independent.H0: Gender and country are independent.
Ha: Gender and country are not independent.
Calculate the test statistic. (Round your answer to two decimal places.)
χ2 =
What is the P-value for the test? (Use a statistical computer package to calculate the P-value. Round your answer to four decimal places.)
P-value =
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