Answer a question

20. Twitter Poll The Pew Research Center conducted a survey of 1007 adults and found that 856 of them know what Twitter is. Use a 0.01 significance level to test the claim that more than 75% of adults know what Twitter is. 32. HDTV Penetration In a survey of 1500 households, it is found that 47% of them have a high-definition television (based on data from the Consumer Electronics Association). Use a 0.01 significance level to test the claim that fewer than half of all households have a high- definition television. Is the result from a few years ago likely to be valid today? PAGE 117 7/8, the test statistic is z = 2.88. Stating Conclusions. In Exercises 25-28, assume a significance level of a = 0.05 and use the given information for the following: a. State a conclusion about the null hypothesis. (Reject Ho or fail to reject Ho.) b. Without using technical terms, state a final conclusion that addresses the original claim. 26. Original claim: Fewer than 20% of M&M candies are green. The hypothesis test results in a P-value of 0.0721. PAGE 109odule update... Lab Assignment Name: Sections 8.2 Due Date: Math 34 This Lab is to be worked in the Math Lab when an instructor is present. You may work with your classmates, but be sure to complete your own assignment to turn in. To receive credit for this assignment you must log in at least 2 hours each week. In Exercises 5-8, identify the indicated values or interpret the given display. Use the nor- mal distribution as an approximation to the binomial distribution (as described in Part 1 of this section). Assume a 0.05 significance level and answer the following: a. Is the test two-tailed, left-tailed, or right-tailed? b. What is the test statistic? c. What is the P-value? d. What is the null hypothesis, and what do you conclude about it? e. What is the final conclusion? 5. Adverse Reactions to Drug The drug Symbicort is used to treat asthma. In a clinical trial of Symbicort, 18 of 277 treated subjects experienced headaches (based on data from AstraZeneca). The accompanying TI-83/84 Plus calculator display shows results from a test of the claim that less than 10% of treated subjects experienced headaches. TI-83/84 PLUS 1-PropZTest Prop