




67 7 In a sample of 167 children selected randomly from one town, it is fou...
2. In a sample of 74 adults selected randomly from one town, it is found that 9 of them have been exposed to a particular strain of the flu. Using P-value, test the claim that the population proportion of all adults in the town that have been exposed to this strain of the flu is greater than 0.10. Use a 0.01 significance level and determine conclusion. a. P-val = 0.732, reject the alternative hypothesis b. P-val = 0.535, reject the...
In a sample of 167 children selected randomly from one town, it is found that 37 of them suffer from asthma. At the 0.05 significance level, test the claim that the proportion of all children in the town who suffer from asthma is 11%. An article in a journal reports that 34% of American fathers take no responsibility for child care. A researcher claims that the figure is higher for fathers in the town of Littleton. A random sample of...
Identify the null and alternative hypothesis, significance level, test that will be used, test statistic, P-value, conclusion about the null hypothesis, and state the final conclusion that addresses the original claim in nontechnical terms. In a clinical study of an allergy drug, 108 of the 202 subjects reported experiencing significant relief from their symptoms. At the 0.10 significance level, test the claim that more than half of all those using the drug experience relief.
In a sample of 167 children selected randomly from one town, it is found that 37 of them suffer from asthma. At the 0.05 significance leveltest the claim that the proportion of all children in the town who suffer from asthma is 11%. A public bus company official claims that the mean waiting time for bus number 14 during peak hours is less than 10 minutes. Karen took bus number 14 during peak hours on 18 different occasions. Her mean...
2) 2) In a sample of 167 children selected randomly from one town, it is found that 37 of them suffer from asthma. At the 0.05 significance level, test the claim that the proportion of all children in the town who suffer from asthma is 11%.
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 =...
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. Identify the null and alternative hypotheses , test statistic, critical value , decision about the null hypothesis and final conclusion that addresses the original claim. Use a significance level of α = 0.01 to test the claim that the µ > 2.85. The sample data consist of 9 scores for which the sample mean is 3.17 and s= 0.57.
Nexium is a drug that can be used to reduce the acid produced by the body and heal damage to the esophagus due to acid reflux. The manufacturer of Nexium claims that more than 94% of patients taking Nexium are healed within 8 weeks. In clinical trials, 213 of 224 patients suffering from acid reflux disease were healed after 8 weeks. Test the manufacturer's claim at the a = 0.01 level of significance. Hypothesis Testing Ho: p=0.94 STEP 1: DETERMINE...
A genetic experiment involving peas yielded one sample of offspring consisting of 438 green peas and 173 yellow peas. Use a 0.05 significance level to test the claim that under the same circumstances, 26% of offspring peas will be yellow. 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 and the normal distribution as an approximation to the binomial distribution. What are the...
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...