10) The mean age of bus drivers in Chicago is 48.7 years. If a hypothesis test is performed, how should you interpret a decision that rejects the null hypothesis? 10)
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A: Solution: Let X be the number of subjects developed nausea and n be the number of subjects are…
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A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…
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A: given data low = 43 high = 115 standard deviation = maximum - minimum4 = 115-434 = 18 E = 2 95% ci…
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Q: ppose 245 subjects are treated with a drug that is used to treat pain and 53 of them developed…
A: GIVEN DATA,n=245x=53p^=xn =53245 =0.2163claim:p>0.20α=0.10we have to complete the hypothesis…
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A: Answer Answer is option (C)
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Q: If the F-statistic is close to one, what would be the decision of a hypothesis test?
A: The F-statistic is the test statistic for F-tests. In general, an F-statistic is a ratio of two…
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A: Given that,Performing a Hypothesis test there are two procedures namely A and B.Here the same sample…
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A: Given test statistic=-1.09, tabulated=1.96
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Q: 28% of students at a university bought lunch from the cafeteria on class days. On a recent class…
A: Givenp=28%=0.28sample size(n)=486No. of students had bought lunch(x)=149p^=xn=149486p^=0.3066
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Q: how should a decision that fails to reject the null hypothesis be interpreted?
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Q: Suppose 235 subjects are treated with a drug that is used to treat pain and 54 of them developed…
A: given dat,n=235x=54p^=xn=54235=0.2298
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A: p-value:The probability value associated with a statistical test is defined as the p-value. In other…
Q: Suppose 218 subjects are treated with a drug that is used to treat pain and 52 of them developed…
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A: Null hypothesis is also known as no difference statement.
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A: Level of significance is the type 1 error which is rejecting the true Null Hypothesis. So here the…
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- Past studies have indicated that the percentage of smokers was estimated to be about 34%. Given the new smoking cessation programs that have been implemented, you now believe that the percentage of smokers has reduced. You randomly surveyed 1708 people and found that 544 smoke. Use a 0.05 significance level to test the claim that the percentage of smokers has reduced.a) Identify the null and alternative hypotheses?H0H0: H1H1: b) What type of hypothesis test should you conduct (left-, right-, or two-tailed)? left-tailed right-tailed two-tailed c) Identify the appropriate significance level.d) Calculate your test statistic (Use ˆpp^ rounded to 4 decimal places). Write the result below, and round your test statistic to 4 decimal places.e) Calculate your p-value. Write the result below, rounded to four decimal places.f) Do you reject the null hypothesis? We reject the null hypothesis, since the p-value is less than the significance level. We reject the…Suppose 300 subjects are treated with a drug that is used to treat pain and 78 of them developed nausea. Use a 0.05 significance level to test the claim that more than 204% of users develop nausea.The test statistic for this hypothesis test is .(Round to two decimal places as needed.)The P-value for this hypothesis test isA concerned group of citizens wanted to know if the proportion of armed robberies in Texas was different in 2011 than in 2010. Their research showed that of the 113,231 violent crimes in Texas in 2010, 7,622 of them were armed robberies. In 2011, 7,439 of the 104,873 violent crimes were in the armed robbery category. Test at a 5% significance level.a) The null and alternative hypothesis would be: �0:�2010=�2011�1:�2010≠�2011 �0:�2010=�2011�1:�2010<�2011 �0:�2010=�2011�1:�2010≠�2011 �0:�2010=�2011�1:�2010>�2011 �0:�2010=�2011�1:�2010>�2011 �0:�2010=�2011�1:�2010<�2011 b) Determine the test statistic. Round to two decimals.�=c) Find the p-value and round to 4 decimals.p = d) Make a decision. Fail to reject the null hypothesis Reject the null hypothesis e) Write the conclusion. There is not sufficient evidence to support the claim that the proportion of armed robberies is different in 2011 than 2010. There is sufficient evidence to support the claim that the…
- Q2)A two sided hypothesis test is performed about a population proportion p.The valid alternative hypothesis is :- (choose the correct option) • p=0.4 ⚫ p0.9 • p0.6Random digit dialing telephone surveys used to exclude cell phone numbers. If the opinions of people who have only cell phones differ from those of people who have landline service, the poll results may not represent the entire adult population. The Pew Research Center interviewed separate random samples of cell-only and landline telephone users who were less than 30 years old. Here’s what the Pew survey found about how these people describe their political party affiliation. State the Null and Alternative Hypotheses.b) What is the observed value of the test statistic for the appropriate hypothesis test? Give answer to 3 decimal places.c) What is the p-value associated to the observed test statistic you have just computed? Give answer to 3 decimal places.
- Do the needs of patients in the emergency room differ for those who come by car vs. those by ambulance? Of the randomly selected emergency room patients who came by car 51 had an injury, 40 were sick, 31 had heart problems and 61 had other needs. Of the randomly selected emergency room patients who came by ambulance 45 had an injury, 30 were sick, 55 had heart problems and 38 had other needs. Conduct the appropriate hypothesis test using an a = 0.10 level of significance. a. What is the correct statistical test to use? O Paired t-test O Homogeneity Goodness-of-Fit O Independence b. What are the null and alternative hypotheses? Ho: O Means of transportation to the emergency room and emergency room needs are independent. Means of transportation to the emergency room and emergency room needs are dependent. The distribution of emergency room needs for patients who come by car is the same as it is for patients who come by ambulance. The distribution of emergency room needs for patients who…A university has decided to introduce the use of plus and minus grading as long as there is evidence that 60% of the faculty is in support of this change. Write an appropriate null hypothesis and alternate hypothesis to test if the proportion is greater than 60%.A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 285 people over the age of 55, 76 dream in black and white, and among 287 people under the age of 25, 10 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. 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 H: P1> P2 O B. Ho: P1 = P2 OC. Ho: P1 = P2 H: P Persuasive Spe.docx a Persuasive Spee.doc a PersuasiveSpch.doc tv MacBook Air F10 F9 心. 20 F3 FS esc F1 F2 & $ % 8 9 @ 4 5 6 2 Y W E R K #3
- I believe that the population mean number of times that adults go for a walk each week is less than 2.0. I spoke with 8 adults and found that they went on walks 3,5,2,1,0,4,0 and 5 times last week. Test this hypothesis at the 0.5 significance level.Past studies have indicated that the percentage of smokers was estimated to be about 34%. Given the new smoking cessation programs that have been implemented, you now believe that the percentage of smokers has reduced. You randomly surveyed 1807 people and found that 574 smoke. Use a 0.05 significance level to test the claim that the percentage of smokers has reduced. a) Identify the null and alternative hypotheses? Но: ? H1: ? v b) What type of hypothesis test should you conduct (left-, right-, or two-tailed)? O left-tailed O right-tailed O two-tailed c) Identify the appropriate significance level. d) Calculate your test statistic. Write the result below, and be sure to round your final answer to two decimal places. e) Calculate your p-value. Write the result below, and be sure to round your final answer to four decimal places. f) Do you reject the null hypothesis? O We reject the null hypothesis, since the p-value is less than the significance level. O We reject the null hypothesis,…Using the proper symbols, write the null and alternative hypotheses for each scenario below. a) A very large study showed that aspirin reduced the rate of first heart attacks by 44%. A pharmaceutical company thinks they have a drug that will be more effective than aspirin and plans to do a randomized clinical trial to test the new drug. b) In the 1950’s, only about 40% of high school graduates went on to college. Has the percentage changed?