According to a recent report, 45% of college student internships are unpaid. A recent survey of 100 college interns at a local university found that 59 had unpaid internships. a. Use the five-step p-value approach to hypothesis testing and a 0.05 level of significance to determine whether the proportion of college interns that had unpaid internships is different from 0.45. b. Assume that the study found that 49 of the 100 college interns had unpaid internships and repeat (a). Are the conclusions the same? What is the final conclusion? Reject the null hypothesis. There sufficient evidence that the proportion of college is interns that had unpaid internships is different from 0.45 because the p-value is less than the level of significance. b. Assume that the study found that 49 of the 100 college interns had unpaid internships and repeat (a). What is the test statistic? ZSTAT = (Round to two decimal places as needed.)

According to a recent report, 45% of college student internships are unpaid. A recent survey of 100 college interns at a local university found that 59 had unpaid internships. a. Use the five-step p-value approach to hypothesis testing and a 0.05 level of significance to determine whether the proportion of college interns that had unpaid internships is different from 0.45. b. Assume that the study found that 49 of the 100 college interns had unpaid internships and repeat (a). Are the conclusions the same? What is the final conclusion? Reject the null hypothesis. There sufficient evidence that the proportion of college is interns that had unpaid internships is different from 0.45 because the p-value is less than the level of significance. b. Assume that the study found that 49 of the 100 college interns had unpaid internships and repeat (a). What is the test statistic? ZSTAT = (Round to two decimal places as needed.)

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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According to a recent report, 45% of college student internships are unpaid. A recent survey of 100 college interns at a local university found that 59 had unpaid internships. a. Use the five-step p-value approach to hypothesis testing and a 0.05 level of significance to determine whether the proportion of college interns that had unpaid internships is different from 0.45. b. Assume that the study found that 49 of the 100 college interns had unpaid internships and repeat (a). Are the conclusions the same? hypothesis, H,- Ho: I 0.45 %3D 0.45 (Type integers or decimals. Do not round.) What is the test statistic? ZSTAT = (Round to two decimal places as needed.)
According to the Center for Disease Control website, in 2011 at least 18% of high school students have smoked a cigarette. An Introduction to Statistics class in a town conducted a hypothesis test at the local high school (a medium sized—approximately 1,200 students—small city demographic) to determine if the local high school's percentage was lower. One hundred fifty students were chosen at random and surveyed. Of the 150 students surveyed, 85 have smoked. Use a significance level of 0.05 and using appropriate statistical evidence, conduct a hypothesis test and state the conclusions.Note: If you are using a Student's t-distribution for the problem, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) State the p-value. (Round your answer to four decimal places.)
According to a recent report, 45% of college student internships are unpaid. A recent survey of 120 college interns at a local university found that 64 had unpaid internships. a. Use the five-step p-value approach to hypothesis testing and a 0.10 level of significance to determine whether the proportion of college interns that had unpaid internships is different from 0.45. b. Assume that the study found that 57 of the 120 college interns had unpaid internships and repeat (a). Are the conclusions the same? a. Let л be the population proportion. Determine the null hypothesis, Ho, and the alternative hypothesis, H₁.
It is believed that 11% of all Americans are left-handed. A college needs to know how many left-handed desks to place in the big lecture halls being constructed on its campus. In a random sample of 120 students of its 12124 students, 15 were left-handed. Does this provide enough evidence to show that students at this college have a higher percentage of left-handers than the general American population? Use a 10% level of significance.
According to a recent report, 46% of college student internships are unpaid. A recent survey of 60 college interns at a local university found that 30 had unpaid internships. a. Use the five-step p-value approach to hypothesis testing and a 0.10 level of significance to determine whether the proportion of college interns that had unpaid internships is different from 0.46. b. Assume that the study found that 38 of the 60 college interns had unpaid internships and repeat (a). Are the conclusions the same? Question content area bottom Part 1 a. Let π be the population proportion. Determine the null hypothesis, H0, and the alternative hypothesis, H1. H0: π ▼ less than< greater than or equals≥ equals= greater than> not equals≠ less than or equals≤ enter your response here H1: π ▼ less than< greater than> not equals≠ less than or equals≤ equals= greater than or equals≥ enter your response here
According to a survey of 650 Web users from Generation Y, 351 reported using the Internet to download music. a. Determine the sample proportion. b. At the 5% significance level, do the data provide sufficient evidence to conclude that a majority of Generation Y Web users use the Internet to download music? Use the one-proportion z-test to perform the appropriate hypothesis test, after checking the conditions for the procedure.
A political scientist claims that 38% of first-year college students characterize themselves as being “moderate” or “middle of the road” as far as their political affiliation is concerned. Believing this claimed value is too high, you survey a random sample of 400 first-year college students and find that 120 characterize themselves as being “moderate” or “middle of the road.” Based on this information, what will the test statistic be? Choose the answer below that is closest to what you calculate, and try not to do a lot of rounding until you get to the very end of your calculations. 1. -0.3 2. -1.2 3. -2.6 4. -3.3 5. None of the other answer options are correct because the test statistic should be positive, not negative.
According to a survey of 650 Web users from Generation Y, 338reported using the Internet to download music. a. Determine the sample proportion. b. At the 10% significance level, do the data provide sufficient evidence to conclude that a majority of Generation Y Web users use the Internet to download music? Use the one-proportion z-test to perform the appropriate hypothesis test, after checking the conditions for the procedure. a. The sample proportion is b. What are the hypotheses for the one-proportion z-test? What is the test statistic? Identify the critical value(s). What is the conclusion of the hypothesis test?
According to a recent report, 468% of college student internships are unpaid. A recent survey of 80 college interns at a local university found that 53 had unpaid internships. a. Use the five-step p-value approach to hypothesis testing and a 0.01 level of significance to determine whether the proportion of college interns that had unpaid internships is different from 0.48. b. Assume that the study found that 46 of the 80 college interns had unpaid internships and repeat (a). Are the conclusions the same? ZStat=___ p-value=____ What is the final conclusion? The result is ____ part (a). ____ the null hypothesis. There ___ sufficient evidence that the proportion of college interns that had unpaid internships is ____ because the p-value ____ the level of significance.
According to a recent report, 45% of college student internships are unpaid. A recent survey of 80 college interns at a local university found that 46 had unpaid internships. a. Use the five-step p-value approach to hypothesis testing and a 0.05 level of significance to determine whether the proportion of college interns that had unpaid internships is different from 0.45. b. Assume that the study found that 42 of the 80 college interns had unpaid internships and repeat (a). Are the conclusions the same? a. Let be the population proportion. Determine the null hypothesis, Ho, and the alternative hypothesis, H₁. Ho: π = 0.45 H₁: 0.45 (Type integers or decimals. Do not round.) What is the test statistic? ZSTAT = 2.25 (Round to two decimal places as needed.) What is the p-value? The p-value is (Round to three decimal places as needed.)
The percentage of complete passes is an important measure for a quarterback in the NFL. A particular quarterback has a career completion percentage of 55%. The quarterback got a new coach and then played a few games where he completed 48 of 100 passes. a. Specify the null and alternative hypotheses to determine whether the proportion of completed passes has decreased with the new coach. b. Calculate the value of the test statistic and the p-value. c. At the 5% significance level, can you conclude that the quarterback's completion percentage has decreased? How do I solve this in excel?
Past studies have indicated that the percentage of smokers was estimated to be about 33%. Given the new smoking cessation programs that have been implemented, you now believe that the percentage of smokers has reduced. You randomly surveyed 1902 people and found that 579 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? b) What type of hypothesis test should you conduct (left-, right-, or 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 null hypothesis, since the p-value is not less than the significance level. We…