a poll of 2094 randomly selected adults showed that 94% of them own cell phones A...
A poll of 2,084 randomly selected adults showed that 94% of them own cell phones. The technology display below ret from a test of the claim that 92% of adults own cell phones. Use the normal distribution as an approximation to the bin distribution, and assume a 0.01 significance level to complete parts (a) through (e). Test of p = 0.92 vs p+0.92 Z-Value P-value Sample p 95% CI N Sample X 0.000 4.01 (0.930869,0.956847) 1 1967 2,084 0.943858 a....
A poll of 2,142 randomly selected adults showed that 92% of them own cell phones. The technology display below results from a test of the claim that 91% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.05 significance level to complete parts (a) through (e). Test of p=0.91 vs p≠0.91 Sample X N Sample p 95% CI Z-Value P-Value 1 1970 2,142 0.919701 (0.908193,0.931210) 1.57 0.117 a. Is the...
A survey of 1,680 randomly selected adults showed that 549 of them have heard of a new electronic reader. The accompanying technology display results from a test of the claim that 37% of adults have heard of the new electronic reader. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.01 significance level to complete parts a through e Sample proportion: 0.326786 Test statistic Critical z: P-Value z:-3.6687 ± 2.5758 0.0002 a. Is the test...
A survey of 1 comma 567 randomly selected adults showed that 570 of them have heard of a new electronic reader. The accompanying technology display results from a test of the claim that 38% of adults have heard of the new electronic reader. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.05 significance level to complete parts (a) through (d. Sample proportion: 0.363752 Test statistic, z: negative 1.3251 Critical z: plus or minus1.9600 P-Value:...
1. Claim Fewer than 97 % of adults have a cell phone. In a reputable poll of 1038 adults, 89 % said that they have a cell phone. Find the value of the test statistic.2. The test statistic of z=1.38 is obtained when testing the claim that p>0.2a. Identify the hypothesis test as being two-tailed, left-tailed, or right-tailed.b. Find the P-value by the calculator or by the table.c. Using a significance level of α=0.05 should we reject H₀ or should...
In a recent poll of 745 randomly selected adults, 590 said that it is morally wrong to not report all income on tax returns. Use a 0.01 significance level to test the claim that 70% of adults say that it is morally wrong to not report all income on tax returns. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method. Use the normal...
Marketers believe that 93% of adults in California own a cell phone. A cell phone manufacturer believes that number is actually lower. 220 Californians are surveyed, of which 90% report having cell phones. Use a 1% level of significance to test the manufacturer’s hypothesis. (6 points) a. H0 : b. Ha : c. What is the test statistic? d. What is the p-value? e. Indicate the correct decision, reason for it, and write an appropriate conclusion using complete sentences. i....
In a random sample of 125 adults, 64% say they have used a cellular phone to access the Internet. We want to test a researcher’s claim at the 5% significance level that more than 60% of U.S. adults have used a cellular phone to access the Internet. [2 points] Find the null and alternate hypotheses. [6 points] By hand, showing work, find the test statistic. [4 points] Sketch the sampling distribution labeling the test statistic and the P-value. [2 points]...
In a study of 420 comma 125 cell phone users, 100 subjects developed cancer of the brain or nervous system. Test the claim of a somewhat common belief that such cancers are affected by cell phone use. That is, test the claim that cell phone users develop cancer of the brain or nervous system at a rate that is different from the rate of 0.0340% for people who do not use cell phones. Because this issue has such great importance,...
What is the P value ?
In a study of 420,092 cell phone users, 103 subjects developed cancer of the brain or nervous system. Test the claim of a somewhat common belief that such cancers are affected by cell phone use. That is, test the claim that cell phone users develop cancer of the brain or nervous system at a rate that is different from the rate of 0.0340% for people who do not use cell phones. Because this issue...