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A Harris poll taken randomly surveyed 2,016 adults and found that 423 of them had one...
A simple random sample of 900 people are surveyed, and it was found that 423 of...
A simple random sample of 900 people are surveyed, and it was found that 423 of them like to shop online. Test the hypothesis that the proportion of people who like to shop online is 50% State the Null and Alternate hypothesis, and the test statistic that is used, and the decision rule for rejecting the Null hypothesis.
In a poll of 1013 adults, it was found that 22% smoked cigarettes in the past...
In a poll of 1013 adults, it was found that 22% smoked cigarettes in the past week. Use a 0.05 significance level to test the claim that less than 25% of adults have smoked within the past week. Use this information to answer the following questions. The null and alternate hypothesis The test statistics is . (Round to two decimal places) The p-value is . (Round to three decimal places)
a poll of 2094 randomly selected adults showed that 94% of them own cell phones A...
a poll of 2094 randomly selected adults showed that 94% of
them own cell phones
A poll of 2,094 randomly selected adults showed that 94% of them own cell phones. The technology display below results from a test of the claim that 92% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.01 significance level to complete parts (a) through (e). Test of p = 0.92 vs p*0.92 Samplex N...
A poll of 2,142 randomly selected adults showed that 92% of them own cell phones. The...
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...
In a Gallup poll, 1025 randomly selected adults were surveyed and 29% of them said that...
In a Gallup poll, 1025 randomly selected adults were surveyed and 29% of them said that they used the Internet for shopping at least a few times a year. Find a 99% confidence interval estimate of the proportion of adults who use the Internet for shopping. (5 points)
In a Gallup poll, 1025 randomly selected adults were surveyed and 298 of them said that...
In a Gallup poll, 1025 randomly selected adults were surveyed and 298 of them said that they used the internet for shopping at least a few times a year. a) Find the point estimate of the percentage of adults who use the internet for shopping. b) Find a 99% confidence interval estimate of the percentage of adults who use the internet for shopping.
In a sample of 88 adults selected randomly from one town, it is found that 6...
In a sample of 88 adults selected randomly from one town, it is found that 6 of them have been exposed to a particular strain of the flu. At the 0.01 significance level, test the claim that the proportion of all adults in the town that have been exposed to this strain of the flue differs from the nationwide percentage of 8%. H0: p = 0.08 HA: p ≠ 0.08. α = 0.01 Test statistic: z = -0.41. P-Value =...
1. In June 2013, the Gallup organization had surveyed 1134 American adults and found that 360...
1. In June 2013, the Gallup organization had surveyed 1134 American adults and found that 360 had confidence in public schools. A year later, in June 2014, Gallup surveyed 1134 American adults and found that 298 had confidence in the public schools. A newspaper reporter saw the data and wrote the headline "Confidence in Schools Deteriorates.'" Test the hypothesis that the of proportion of Americans who have confidence in the public school systems is significantly less in 2014 than in...
A poll of 2,084 randomly selected adults showed that 94% of them own cell phones. The...
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....
I. In a KRC Research poll, 1002 adults were asked if they felt vulnerable to identity...
I. In a KRC Research poll, 1002 adults were asked if they felt vulnerable to identity theft, and 531 of them said "yes". Use a 0.05 significance level to test the claim that the majority of adults feel vulnerable to identity theft. Write the null and alternative hypotheses in symbolic form. a. b. Find the test statistic. c. Find the P-value. d. Make a decision about the null hypothesis. e. State the final conclusion, addressing the original claim, in nontechnical...
In a poll of 1013 adults, it was found that 22% smoked cigarettes in the past week. Use a 0.05 significance level to test the claim that less than 25% of adults have smoked within the past week. Use this information to answer the following questions. The null and alternate hypothesis The test statistics is . (Round to two decimal places) The p-value is . (Round to three decimal places)
a poll of 2094 randomly selected adults showed that 94% of
them own cell phones
A poll of 2,094 randomly selected adults showed that 94% of them own cell phones. The technology display below results from a test of the claim that 92% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.01 significance level to complete parts (a) through (e). Test of p = 0.92 vs p*0.92 Samplex N...
In a Gallup poll, 1025 randomly selected adults were surveyed and 29% of them said that they used the Internet for shopping at least a few times a year. Find a 99% confidence interval estimate of the proportion of adults who use the Internet for shopping. (5 points)
1. In June 2013, the Gallup organization had surveyed 1134 American adults and found that 360 had confidence in public schools. A year later, in June 2014, Gallup surveyed 1134 American adults and found that 298 had confidence in the public schools. A newspaper reporter saw the data and wrote the headline "Confidence in Schools Deteriorates.'" Test the hypothesis that the of proportion of Americans who have confidence in the public school systems is significantly less in 2014 than in...
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....
I. In a KRC Research poll, 1002 adults were asked if they felt vulnerable to identity theft, and 531 of them said "yes". Use a 0.05 significance level to test the claim that the majority of adults feel vulnerable to identity theft. Write the null and alternative hypotheses in symbolic form. a. b. Find the test statistic. c. Find the P-value. d. Make a decision about the null hypothesis. e. State the final conclusion, addressing the original claim, in nontechnical...
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