The alpha level.001 has a corresponding z score of .002 O True O False
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- For a study that had 40 total participants equally distributed among the 4 groups and an MSW of 4.65, which of the following is the correct result of the Tukey’s HSD calculation (.05 alpha level)? 4.09 4.15 4.79 5.18For a population with u = 84 and o = 4, what is the z-score corresponding to X= 80? O -1,00 +1,00 O+1.25 -1.50A researcher found that the two groups (n=25 in each group) they tested were significantly different from each other with a t-value of 2.91, which has a corresponding p-value of p=.06. Report the findings in APA number format.
- Which of the following is a two-tailed test? O Ho: µ = 89, H1: u 84 O Ho: µ = 54, H1: u # 54Participants threw darts at a target. In one condition, they used their preferredhand; in the other condition, they used their other hand. All subjects performed inboth conditions (the order of conditions was counterbalanced). Their scores areshown below.Preferred Non-preferred12 77 911 813 1010 9a. Which kind of t-test should be used?b. Calculate the two-tailed t and p values using this t test.c. Calculate the one-tailed t and p values using this t test.There has been a long-held belief that births occur more frequently in the "small hours of the morning" than at any other time of day. Sutton [1945] collected the time of birth at the King George V Memorial Hospital, Sydney, for 2654 consecutive births. (Note: The total number of observations listed is 2650, not 2654 as stated by Sutton.) The frequency of births by hour in a 24-hour day is listed in Table 3.16. (a) Sutton states that the data "confirmed the belief ... that more births occur in the small hours of the morning than at any other time in the 24 hours." Develop a graphical display that illustrates this point. (b) Is there evidence of Sutton's statement: "An interesting point emerging was the relatively small number of births during the meal hours of the staff; this sug- gested either hastening or holding back of the second stage during meal hours"? Table 3.16 Frequency of Birth by Hour of Birth Time Births Time Births Time 6-7 pm 7 pm 8 pm 9 pm 10 pm 11 pm 12 am 1 am 92 102…
- The average amount of time it takes for couples to further communicate with each other after their first date has ended is 2.35 days. Is this average different for blind dates? A researcher interviewed 70 couples who had recently been on blind dates and found that they averaged 2.5 days to communicate with each other after the date was over. Their standard devlation was 0.655 days. What can be concluded at the the a = 0.10 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ?v Select an answerv H: ?vSelect an answerv c. The test statistic ?v (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ?v a f. Based on this, we should Select an answerv the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest that the population mean is not significantly different from 2.35 at a = 0.10, so there is statistically…Determine whether the given description corresponds to an observational study or an experiment. In a study of 366 women with a particular disease, the subjects were monitored with an EEG while asleep. Does the given description correspond to an observational study or an experiment?Dr.Blume has trained observers to use frequency recording to record the behavior of 12 schizophrenic clients. According to the analysis of the data κ = 0 . 47, do you think the observers are sufficiently trained to allow Dr. Blume to proceed with the research?
- The NIH is creating a test for the Zika virus. The incidence of a Zika is low, 11 percent in the general population. There is a trial version, but it sometimes misses the disease. The probability of a false negative is 0.03. Similarly, someone who does not have Zika, will sometimes get a positive reading. The probability of this is 0.1. Fill in the tree diagram and... Answer as a decimal to 4 decimal places. D = event that someone actually has Zika %3D positive = event that a test states that a person has Zika Conditional Marginal Probabilities Joint Probabilities Probabilities 0.9700 Enter an integer or decimal number [more..] P(D and positive) P(positive | D) False 0.1100 0.0300 negative P(D) P(negative | D) P(D and negative) 0.1000 False Positive 0.8900 P(no D) P(positive | no D) P(no D and positive) 0.9000 P(negative | no D) P(no D and negative)A leading GIS company arranged a special summer training programme for students of a reputed University. The scores obtained by a random sample of 10 students are given below. Use α = 0.10 to determine whether there is a significant improvement in knowledge of the students after attending the training programme.Student Score before training Score after training1 25 322 26 3023 28 324 22 345 20 326 30 287 22 258 20 309 21 2510 24 28Consider ratings of 4 “Agree” or 5 “Strongly Agree” to mean that test takers have obtained a “high” score on a BRS item. Ratings of 1-3 would be considered “low” item scores. Compute the item discrimination index (d) for BRS Item 3. Enter the values below that you obtain from Excel: Total # of test takers N = _______ 25% of the total # of test takers, or # in the Upper 25% group U = _______ # of test takers in the Upper 25% group for BRS total scores who scored high on item 3 = _______ # of test takers in the Lower 25% group for BRS total scores who scored high on item 3 = _______ Item discrimination index d = ________ ID # Item 1 Item 2 Item 3 Item 4 Item 5 Item 6 BRS Total Score 25 5 5 5 5 5 5 55 24 5 5 2 4 5 5 50 21 5 4 5 3 5 5 48 22 5 5 4 3 3 4 46 23 5 3 3 5 5 2 46 18 4 5 5 4 4 4 44 20 5 5 4 3 3 4 44 16 5 4 5 5 4 3 42 19 4 5 4 1…