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- What is a sample space?Are blonde female college students more likely to have boyfriends than brunette female college students? 389 of the 637 blondes surveyed had boyfriends and 342 of the 630 brunettes surveyed had boyfriends. What can be concluded at the a = 0.10 level of significance?IS 15. Kids with cell phones: A marketing manager for a cell phone company claims that more than 55% of children aged 8-12 have cell phones. In a survey of 802 children aged 8-12 by the National Consumers League, 449 of them had cell phones. Can you conclude that the manager's claim is true? Use the a = 0.01 level of significance.
- Astudy was conducted to determine the proportion of people who dream in black and white instead of color. Among 317 people over the age of 55, 63 dream in black and white, and among 300 people under the age of 25, 17 dream in black and white. Use a 0.01 significance level to test the claim that the proportion of people over 55 who dreamn tackand white is greater than the proportion for those under 25. Complete parts (a) through (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of people over the age of 55 and the second sample to be the sample of people under the age of 25. What are the null and altenative hypotheses for the hypothesis test? OA. Ho P =P2 H, P P2 O B. Ho P1 SP2 H,: P, #P2 O C. Ho P1 #P2 H, P, = P2 O D. H, P1 =P2 H P P2 O E. H, P1 =P2 H,: P,A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 289 people over the age of 55, 77 dream in black and white, and among 289 people under the age of 25, 11 dream in black and white. Use a 0.01 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of people over the age of 55 and the second sample to be the sample of people under the age of 25. What are the null and alternative hypotheses for the hypothesis test? O A. Ho: P₁ #P2 H₁: P₁ = P2 O D. Ho: P1 = P2 H₁: P₁ P2 Identify the test statistic. Z= (Round to two decimal places as needed.) Identify the P-value. P-value = (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? The P-value is those under 25. the…Astudy was conducted to determine the proportion of people who dream in black and white instead of color. Among 317 people over the age of 55, 63 dream in black and white, and among 300 people under the age of 25, 17 dream in black and white. Use a 0.01 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below. (Round to two decimal places as needed) Identify the P-value P-value= (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? the null hypothesis. There is evidence to support the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. The P-value is the significance level of a = 0.01, so b. Test the claim by constructing an appropriate confidence interval. The 98% confidence interval is< (P1 P2) U (Round to three decimal places as needed.)…
