.What type of error did you make
Q: Researchers wondered if there was a difference between males and females in regard to some common…
A: Given Data n1 = 522 x1 = 202 n2 = 505 x2 = 171
Q: A crossover trial is a type of experiment used to compare two drugs. Subjects take one drug for a…
A:
Q: In a study of the effects of caffeine on memory, a researcher assigned one group of students to…
A: For testing the validity of the claim, which involves two different population parameters, the null…
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A: Solution: It is given that a psychologist was interested in the effects of time of day on critical…
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A: From given data we have : X=16,n=25
Q: A researcher wants to know whether a hard copy of a textbook provides additional benefits over an…
A: A researcher wants to know whether a hard copy of a textbook provides additional benefits over an…
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A: The provided data is,
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A: Introduction An hypothesis is an assumption that is being tested.
Q: You are a senior in the agricultural sciences department of NCSU doing an internship at a local…
A:
Q: Scenario: A researcher wants to know whether a hard copy of a textbook provides additional benefits…
A: Introduction: It is required to identify the most suitable option.
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A: It is given that 3% have the type of cancer. that is, PCancer=0.03, it is also found that the test…
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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: A new, simple test has been developed to detect a particular type of cancer. The test must be…
A: It is given that 3% have the type of cancer. that is, PCancer=0.03, it is also found that the test…
Q: don't believe her. You decide to check this out on your own. You randomly survey 64 of her past…
A: Given that x=33n=64 p^=xn=3364=0.5156 confidence level=95% z critical value for 95% confidence…
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A: Sol:- a) The analysis of variance table is: Source SS df MS F Columns 13.8 1 13.8 2.82 Rows…
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A: n=1911 x = 974 x/n = 0.51
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A: 1) Number of Expected Significance tests at 0.05 level is: 48*0.05 = 2.4 Number of Significant…
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A: given data, claims that 60% of students who take her class feel more enriched after completing…
Q: Scenario: A researcher wants to know whether a hard copy of a textbook provides additional benefits…
A: Solution: First we understand what is null and alternative hypothesis
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Q: hoyed by people who repeatedly check their mobile phones while having an in-person conversation?"…
A:
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A: Given n1=44, n2=97 X1bar=10.5, X2bar=9.5 sigma1=1.5 , sigma2=1.8 alpha=0.04=level of significance…
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A: Given that, The sample size n=36 The sample mean x¯=84 The population mean μ=80 The population…
Q: An anger-management course claims that, after completing its seminar, participants will lose their…
A: Assume that μd is the mean value of the difference between the number of times temper was lost…
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A: Enter the data in SPSS as Where 1 denotes Teacher's aide and 2 denotes No teacher's aide.
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A: Levels of Measurement: Levels of measurement or scales of measurement indicate the accuracy with…
Q: There is popular belief that herbal remedies such as Ginkgo Biloba and Ginseng may improve learning…
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A: The probability of applicants passed the test is, PP=0.6. The probability of applicants not pass the…
It has been shown many times that on a certain memory test, recognition is substantially better than recall. However, the probability value for the data from your sample was 12,so you were unable to reject the thanks hypothesis that recall and recognition produce the same results .What type of error did you make?
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- Researchers wondered if there was a difference between males and females in regard to some common annoyances. They asked a random sample of males and females, the following question: "Are you annoyed by people who repeatedly check their mobile phones while having an in-person conversation?" Among the 505 males surveyed, 171 responded "Yes"; among the 522 females surveyed, 202 responded "Yes." Does the evidence suggest a higher proportion of females are annoyed by this behavior? Complete parts (a) through (g) below. C -0.0484 ő 0 0.0484 (e) Determine the P-value based on the model from part (d). First find the test statistic for this hypothesis test. (Round to two decimal places as needed.)You find a coin in the street and are flipping it while walking away. You happen to look at the outcomes of your coin flips and notice heads is showing up more than you think it should. After 10 flips, the coin has landed on heads 8 of the 10 flips. Deciding you need more data, you flip the coin 25 more times and it lands heads up 18 times. You have now flipped the coin 35 times, 26 of which have landed heads. You are still surprised of these results, so you decide to flip the coin 100 more times and record the data. This time, the coin landed heads up 75 times. Now, you flip your coin 135 times, and it lands heads up 101 times. Are you convinced that the coin you have found is weighted, meaning that it favors one outcome over the other? Why? What is the name of the property of probability shown in the previous example? (continuous probability, discrete probability, law of averages, law of large numbers)An anger-management course claims that, after completing its seminar, participants will lose their tempers less often. Always a skeptic, you decide to test this claim. A random sample of 12 seminar participants is chosen, and these participants are asked to record the number of times that they lost their tempers in the two weeks prior to the course. After the course is over, the same participants are asked to record the number of times that they lost their tempers in the next two weeks. The following table lists the results of the survey. Using these data, test the claim at the 0.01 level of significance assuming that the population distribution of the paired differences is approximately normal. Let participants before completing the anger-management course be Population 1 and let participants after completing the anger-management course be Population 2. Number of Times Temper Was Lost during a Two-Week Period Before 10 6 8 10 6 3 10 3 8 After 6 7 4 4 8 6 4 9 3 7 Copy Data Step 2 of 3:…
- Should you have a cup of coffee to make you more alert when studying for a big test? A researcher is interested in studying the effect of caffeine, and he comes up with the following plan for an experiment. The experiment will involve 100 volunteers each of which will take a memory test 20 minutes after drinking cola. Some volunteers will be randomly assigned to drink caffeine-free cola; some to drink regular cola (with caffeine), and the others a mixture of the two (getting a half dose of caffeine). For each volunteer, a test score (the number of items recalled correctly) will be recorded. The volunteers will not be told which type of cola they have been given, but the researcher who evaluates the results will prepare the cups of cola right on the spot (out of sight of the volunteers).(a) What type of design is this experiment? (b) The treatments are (c) The score of the memory test is the ? (d) The study finds that the group of students who drink…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.Does the source of medical information affect people’s confidence that it is true? To answer this question, you presented medical information to participants regarding the importance of vaccinations. Participants were randomly assigned to read medical information from a doctor, a politician, or a celebrity. Then, they indicated how confident they were that the information is true.
- A hospital claims that 40% of its patients request a telephone. you are interested in disproving this claim. you select a random sample of 250 patients and find that 85% requested a telephone. what is the test statistic for this test?A dowser has correctly located water for a well 1 out of 2 times in Jones County. In Jones County, someone who is just guessing has a 40% chance of locating water for a well. Does this sample provide sufficient evidence that the dowser can locate water and is not just guessing?A study was performed to test eyewitness accuracy. Ten pairs of participants entered a room believing they would be participating in a gambling experiment. Each participant was given $10 in coins to play poker with. The participants were randomly seated near the door or away from the door. After 15 minutes, an actor dressed in street clothes burst into the room and stole the money from the participant near the door. The “thief” was later caught, and both participants (the victim and the witness) were asked to identify him in a line-up. Eyewitness accuracies from the participants were then compared. The ten victims reported a mean accuracy of 31.5 (SD = 21). The witnesses had a mean accuracy of 52.2 (SD = 19.5). Was there a difference? What was the effect size of eyewitness accuracy? Show the nul and alternative hypthoesis, aplhpa level 0.05 and test the null hypothtesis and draw the rejctin line, conclusion and effect size
- Scenario: A researcher wants to know whether a hard copy of a textbook provides additional benefits over an e-book. She conducts a study where participants are randomly assigned to read a passage either on a piece of paper or on a computer screen. After a distractor task lasting 30 minutes, the participants are tested for their comprehension of the passage with a multiple-choice test containing 10 questions about their passage. Comprehension was scored using percent correct (0 — 100%). The researcher predicts that those randomly assigned to read the passage on a piece of paper will remember significantly more than those who read the passage online. Question: What is the research / alternate hypothesis for this scenario? People who read a passage on a piece of paper will remember more than those who read a passage online. People who read a passage on a piece of paper will not remember more than those who read a passage online. Amount remembered of a passage will vary based…Six students were given a memory recall test on an empty stomach, then again after eating a 500-calorie meal. Estimate the mean difference in memory recall scores between the two groups using 95% confidence. Empty Stomach 57 68 82 94 85 100 After Eating 68 75 91 90 85 100