When do we use a One Tailed Test? When do we use a Two Tailed Test?
Q: 2- The social researchers state there is an association between gender (sex) and response to…
A: Chi square χ2 test: Chi square test is used to test the association or relationship categorical…
Q: In a statistic class, 3 scores were randomly selected with the following results were…
A: The question is about z score.Given :Randomly selected no. of scores ( n ) = 3To find :z score for…
Q: Data collection has been carried out to test the statement which says that the standing endurance of…
A: Let X be the standing endurance of a random salesperson. In the given data, we have 31 observations…
Q: 3. Researchers conducted an experiment on how fast we make snap judgments about the friendliness of…
A: Given information: Part Normal Faces Hidden Eye Faces 1 332 380 2 432 470 3 363 386 4 295…
Q: Migraine and Acupuncture: A migraine is a particularly painful type of headache, which patients…
A:
Q: Researchers wondered there was a difference between males and females in regard to some common…
A: Given: Total males surveyed =507 Males having annoying behavior =168 Total females =570 Females…
Q: Moral judgments about a harmful behavior are expected to be associated with one’s ability to…
A: 1. The regression equation for predicting exclusion judgments from participants’ evaluations of the…
Q: Question Dr. King is concerned that STA 2381 students aren't studying enough. There are 7 sections…
A: A variable is a characteristic that is being measured.
Q: According to the Bureau of Transportation Statistics, on-time performance by airlines is described…
A: Let Oi be the observed frequencies Ei be the expected frequencies N = Total number of flights = 235
Q: Assume that adults were randomly selected for a poll. They were asked if they "favor or oppose using…
A: Solution: Given information : n = 490 favor + 395 opposed = 885 sample size X = 490 favor…
Q: A medical researcher wants to test the effect of three different medications for low blood pressure.…
A: A medical researcher wants to test the effect of three different medications for low blood pressure.…
Q: 2.24 Exit poll: Edison Research gathered exit poll results from several sources for the Wisconsin…
A:
Q: A true false test consists of 50 questions. How many does a student need to get correct to convince…
A: Solution-: A true false test consists of 50 questions. How many does a student need to get correct…
Q: With a = 0.05, the critical value is Since the chi-square statistic X² is The psychologist the…
A: Observed Frequency: Actual Father Unrelated man #1 Unrelated man #2 28 15 19
Q: A researcher studied whether people who work from an office (compared to people who work from home)…
A: The researcher obtained a total sample of 502 participants. Which of the following is one of the…
Q: CH 10 3-What are 2 examples where a one-sample z-test would be appropriate?
A: Example 1: The height of all boys in a college follows normal distribution with mean height of 6.2…
Q: Should we use a one-tailed or two-tailed test?
A: Here Dr Chung claims that balanced breakfast increases Productivity... Now Here take μd=mean of…
Q: 8) Suppose you were to collect data for the pair of given variables in order to make a scatterplot.…
A: In theory of statistics, dependent variable is the response variable, where the variation of the…
Q: A researcher would like to determine whether there is any relationship between students’ grades and…
A: From the provided information, Sample size (n) = 100 Sample mean (M) = 3.25 Population standard…
Q: 1b Using the information from the case in question #1, identify the test you would run for each of…
A: The testing of whether students rate the car more reliable or desirable is the on-sample t-test.…
Q: The average ticket price for an NBA game in the last pre-Covid season (2018-2019) was $154. The…
A:
Q: According to a guide, 47% of cell phone users have only one cell number, 32% have two numbers, 9%…
A: We have given that p1=47%, p2=32%, p3=9%, p4=12% Cell number Observed Frequency=O One cell…
Q: Banana state issued a law that prohibits selling cigarettes to underaged citizens who are under 18…
A: Given information: The data represents the ages of some randomly selected selling records.
Q: A school is implementing a peer tutoring program. To study the program's effectiveness, the school…
A: From given data we have : total number of students = 50
Q: 1. When should a one-tailed test be used? A two-tailed test?
A: Here, We have to give brief idea about one-tailed test and two tailed test When we conduct a test (…
Q: About 77% of young adults think they can achieve the American dream. Determine if the following…
A: Provided data is, about 77% of young adults think they can achieve the American dream. To check if a…
Q: 04. The level of significance using a one tailed test relates to the hypothesis that the values of…
A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: Sex sells, part II In Exercise 11 you considered the ques-tion of whether sexual images in ads…
A:
Q: 2. A researcher asks if people score higher or lower on a questionnaire measuring their emotional…
A: Sample size: n=8 Sample data: Low x1 High x2 14 18 13 12 17 20 15 19 18 22 17 19…
Q: Q2. Consider the following table as an example of a possible data set of the people in Bangladesh.…
A: For the given data Perform Chi square test
Q: statistics students are randomly selected. for each of them, their body temperature is measured (°C)…
A: Concept: Correlation (r) is defined as the linear relationship between the two variables. The range…
Q: The Humane Society of California reported in one of its most recent magazines that 11.6% of American…
A: Consider that p is the true population proportion of American adults, who have both a cat and a dog…
Q: A statistics professor has observed that about 13% of the students who initially enroll in his…
A: a) This is a one-tailed test, since the statistics professor tries a statistical software whether it…
Q: Suppose we have 10 pairs and test a right tailed alternative. We obtain a test statistic value of…
A: Here we have n = 10 and t = 46 And it is right tail test.
Q: What is the formula for a two tailed test?
A: In two-tailed test the critical area of a distribution is two-sided. If the sample being tested…
Q: 12. Suppose a researcher is using a two-way Chi-square test to evaluate the relationship between…
A: For the given data df =?
Q: The Rip-off Vending Machine Company operates coffee vending machines in office buildings. The No. of…
A: We have given that Sample size n = 9 Level of significance =?=0.05
Q: When the null hypothesis is true, the F test statistic is close to ["",…
A: H0: Null Hypothesis F test statistic (F)=Variance of Dataset1Variance of Dataset2
Q: Which of the following is a benefit of randomization when compared to repetition? A.…
A: Given that Which of the following is a benefit of randomization when compared to repetition? A.…
Q: We want to assess three new medicines (FluGone, SneezAb, and Fevir) for the flu. Which of the…
A: Disclaimer: Since you have asked multiple questions, we will solve the first question for you. If…
Q: 36% of canadians are single and 20 % are corona infected whereas 12 % are single and corona…
A: I have used Tree diagram to solve it .
5.) When do we use a One Tailed Test? When do we use a Two Tailed Test?
Step by step
Solved in 2 steps with 1 images
- Moral judgments about a harmful behavior are expected to be associated with one’s ability to recognize how hurt the victim of the harmful behavior is. To test this a replication of the Malti and colleagues (2012) was attempted. Researchers asked 12- and 15-year-olds whether they thought it was okay to exclude a Serbian peer from going to a soccer match (1 = really not okay, 7 = really okay) and how they thought the Serbian peer would feel if he/she was not invited to the soccer match (1= very bad, 7 = very good). The results for 12 of these adolescents are below: 1. Find the correlation, r, between exclusion judgments and evaluations of the victim’s feelings (assuming the researcher wanted to use the 1 to 7 scale as a numerical interval score). Q: r= ? 2. Describe this correlation and what does this correlation indicate about the relation between exclusion judgments and evaluations of the victim’s feelings?Luonpea Reattempt this question dudnsanOus When you are done, click here to see a summary of your score Question with last attempt is displayed for your review only In a certain school district, it was observed that 34% of the students in the element schools were classified as only children (no siblings). However, in the special program for talented and gifted children, 118 out of 288 students are only children. The school district administrators want to know if the proportion of only children in the special program is significantly different from the proportion for the school district. Test at the o 0.01 level of significance What is the hypothesized population proportion for this test? 251 P = (Report answer as a decimal accurate to 2 decimal places. Do not report using the percent symbol) Based on the statement of this problem, how many tails would this hypothesis test have? one-tailed test two-tailed test Choose the correct pair of hypotheses for this situation: (B) (A) |(C) Ho:…When we examine a proposed experimental study for possible confounds, which of these should look for? Confounds due to the age of the participants the order in which the conditions of the study were tested the size of the sample whether the study has ever been carried out before and published (a and b), but not (c and d)
- Solve second oneIs there an association between daily screen time and exercise habits in high school students? Mia selects a random sample of 123 high school students and categorizes them into 1 of 3 categories of screen time and whether they exercise. She would like to determine if there is convincing evidence of an association. Let = 0.05. What are the hypotheses for this test? H0: There is an association between daily screen time and exercise habits in high school students.Ha: There is no association between daily screen time and exercise habits in high school students.H0: There is no association between daily screen time and exercise habits in high school students.Ha: There is an association between daily screen time and exercise habits in high school students.H0: There is no difference in the distribution of daily screen time and exercise habits in high school students.Ha: There is a difference in the distribution of daily screen time and exercise habits in high school students.H0: There is a…20.
- Random sample of team members average practice time. Team A: x-bar=52.3, s=9.7, n=125 Team B: x-bar=45.6, s=13.3, n=120 a) Does the data provide convincing statistical evidence that team B spends less time practicing, on average, than those on Team A? b) What type of error, Type I or Typy II, could have been made and the consequences?The mechanics of a paired tt-test are very similar to a Student's tt-test.Mr. A wants to analyze the CGPA of bachelor's students for the years 2011, 2012, 2013, Is she conducting a cross sectional study? True O False
- is described below. NOTE: If the method is experimental, indicate if it is a true experiment or quasi experiment. 1. I get 30 people and use random assignment to divide the people into two groups. One group reads an article about the statistics of injuries and deaths caused by people using smart phones while driving, the other group watches a short video about a person who killed someone while using their smart phone. Both groups are then monitored to see if either of these made a difference in how often these people use their smart phones use while behind the wheel. What method would that study be? 2. What method asks a series of questions that are all planned in advance?6. In a survey of 460 drivers from the South, 394 wear a seat belt. In a survey of 340 drivers from the Northeast, 287 wear a seat belt. At x = 0.09, can you support the claim that the proportion of drivers who wear seat belts is greater in the South than in the Northeast? Assume the random samples are independent. Complete parts (a) through (e). (a) Identify the claim and state Ho and Ha. The claim is "the proportion of drivers who wear seat belts in the South is greater than in the Northeast." Let p, represent the population proportion for the South, and p2 represent the population proportion for the Northeast. State Ho and Ha- Choose the correct answer below. C. Ho: P1 2 P2 Ha: P1 P2 Ha: P1 SP2 B. Ho: P1 P2 (b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is(are) (Use a comma to separate answers as needed. Type an integer or a decimal. Round to two decimal places as needed.) Identify the rejection region(s). Select the correct choice below…5