* :Grade ResultsG One example of a time deposit s X/Ims.graderesults.com/gr/modules/activities/course.php?courselD=hqusx5Z_jkVdGMLTfwtneg.&gradelD=..A TN promisewh ccsfM The University of M..on....PDE My Perspectives Stu... SHome : Homework.My ActivitiesTell me what you want to do QThe average scores of students in the final exam in two neighboring collegesResetare equal. If a hypothesis test is performed, how should you interpret adecision that rejects the null hypothesis?compRThere is sufficient evidence to support the claim that the average scores ofQuesstudents in the two neighboring colleges are equal.There is no sufficient evidence to support the claim that the average scores1of students in the two neighboring colleges are equal.4There is sufficient"vidence to warrant the rejection of the claim that theaverage scores of students in the two neighboring colleges are equal.10There is sufficient evidence to warrant the rejection of the claim that the« Previous00:00 / 00:00Grade Results, Inc. © 2005-2021. All Rights Reserved.

Given, The average scores of students in the final exam in two neighbouring colleges are equal.…

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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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An auto shop wants to examine the proportion of customers that have to return after an appointment. Last year, an examination of 381 customers found that 33.0% had to return after an appointment. You instituted some changes at the auto shop this year, and found from a sample of 258 customers that 36.2% had to return after an appointment. You want to conduct a hypothesis test to determine if there has been an increase in the proportion of customers that need to return after an appointment since the past year, with a = 0. 10. Using this information, what is the p in your analysis? Round your final answer to two decimal places. Note: 1- Enter your final answer with 2 decimal places.
2. Can hypothesis testing ever prove a hypothesis true? How should we interpret an experiment where we fail to reject the null hypothesis?
A group of 250 patients was randomly split into two groups of 125 patients. The first group of 125 patients was given treatment A, and 72 of them improved their condition. The second group of 125 patients was given treatment B, and 60 of them improved their condition. Perform a hypothesis test to investigate whether there is evidence of a difference between the two treatments. What is the p-value of the test?
A researcher would like to test the claim that the proportion of middle-aged smokers with a lung capacity under 3 liters is less than the proportion of senior citizen nonsmokers with a lung capacity under 3 liters. A random sample of 46 middle-aged smokers had 32 with lung capacities under 3 liters, and a random sample of 46 senior citizen nonsmokers had 25 with lung capacities under 3 liters. These two independent samples will be used in a hypothesis test of this claim. Which test statistic formula should be used for this test? (1-₂)-(1-12) DII Ot= Ot= Oz= F3 Oz= F + VT 722 4 d-d 8d √n (P1-P₂) Submit Question O None of the above pq pq Vm + m (1₂) - (1-12) of V + 72₂ % 5 T (P1-P2) G A B FS 6 H F6 N & 7 U J PrtScn 8 FB K Home 9 F9 End 0 F10 P
When conducting a hypothesis test, what would it mean if the researcher obtains a negative test statistic? The sample is too small. It’s very unlikely the results would have occurred just by chance alone. The sample statistic is smaller than the claimed population parameter. A mistake was made in terms of calculating the test statistic. The sample statistic is larger than the claimed population parameter.
According to a New York Times/CBS News poll conducted during June 24–28, 2011, 55% of the American adults polled said that owning a home is a very important part of the American Dream (The New York Times, June 30, 2011). Suppose this result was true for the population of all American adults in 2011. In a recent poll of 1780 American adults, 60% said that owning a home is a very important part of the American Dream. Perform a hypothesis test to determine whether it is reasonable to conclude that the percentage of all American adults who currently hold this opinion is higher than 55%. Use a 10% significance level, and use both the p-value and the critical-value approaches. Round your answers for the observed value of z and the critical value of z to two decimal places, and the p-value to four decimal places.zobserved =Enter you answer; z_observed p-value =Enter you answer; p-value Critical value =Enter you answer; Critical value
Members of the Town of Colonie Golfers’ Loop frequently raise concerns to Mr. Lange, as its leader, about how the league is run. The most frequent concern raised is that the teams competing each week are not statistically even. In other words, members raise concerns that one or more teams have a statistical advantage over other teams. To evaluate the validity of these claims, Mr. Lange has decided to use a mix of statistical hypothesis tests discussed in this course to evaluate the teams from Outing #14 in calendar-year 2016 (2016, #14). One is the Equal Vari- ances F Test, one is Welch’s T Test, and the other is the 2-Sample T Test for Equal Means. In this particular outing, seven teams were competing for the win. A random sample of eight prior scores from each team member was collected, and the summary statistics are shown below (correct to three decimal places). team sample size sample mean sample variance 1 24 76.500 14.522 2 32 79.656 18.233…
A teacher believes that the percentage of students at her high school who go on to college is higher than the rate in the general population of high school students. The rate in the general population of high school students is 30%. In the most recent graduating class at her high school, the teacher found that 90 students graduated and that 40 of those went on to college. Please use the chi-square test to design a complete hypothesis testing process and get appropriate conclusions. (You need to indicate the value of X2obt and df and X2cv)
There is some research to indicate that different dog breeds differ in emotionality. To consider these differences, a researcher administers a standard test of emotionality to 3 breeds of dogs (German Shepherd, Cocker Spaniel, and Chihuahua), with 4 dogs from each breed being tested. Higher scores mean higher emotionality. The results for the emotionality test scores appear below. Using the 7 steps of hypothesis testing, test the idea that there are differences in emotionality based on dog breed using α = .05 Emotionality Scores for Dogs German Shepherd Cocker Spaniel Chihuahua 6 0 10 1 4 12 7 0 9 2 0 8 T = 16 T = 4 T = 39 Gt = 59 N = 12 ∑x2 = 495 4. Decision Rule (Be sure to include your critical value) 5. Do your calculations 6. Make your decision 7. State your results in a sentence. Report your results in APA style including a measure of effect size. Be sure to include descriptive statistics (M). 8. Given your decision in #7, would…
According to a New York Times/CBS News poll conducted during June 24 - 28, 2011, 55% of the American adults polled said that owning a home is a very important part of the American Dream ( The New York Times, June 30, 2011)Suppose this result was true for the population of all American adults in 2011. In a recent poll of 1820 American adults, 62 said that owning a home is a very important part of the American DreamPerform a hypothesis test to determine whether it is reasonable to conclude that the percentage of all American adults who currently hold this opinion is higher than 55%. Use a 5% significance level use both the p value and the critical value approaches. Round your answers for the observed value of zand the critical value of z to two decimal places , and the pvalue to four decimal places z observed=p-value=critical value=
You come across Professor Cafferty's data set from his Master's thesis and realize that he has data on types of family support that 26 homosexual men had during young adulthood (about 18-25 years old). You come across two questions where the respondent was asked if they would identify their family as religious and whether or not they received financial support from their family. Please complete the appropriate 8-step hypothesis test using the data below. Had Financial Support Did Not Have Financial Support Family Religious 3 12 Family Not Religious 6 5
2. You want to propose your long time best friend. But you are scared to do so fearing rejection. Since both of you are statistics freaks, you gave your best friend two statements, one representing null hypothesis and the other representing alternate hypothesis. The rejection of null by your best friend would mean that your proposal is accepted. Write the null and alternate hypothesis statements. How will you define Type-I error and Type-II error in this case?

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