3. Ophthalmic lens is used in optical device to enhance vision addressing the visual needs of theindividual wearer. Two different polishing solutions can be used for polishing the ophthalmiclenses. 350 lenses were polished using the first polishing-solution, and of this number, 294had no polishing-induced defects. Another 400 lenses were polished using the secondpolishing solution, and 74 lenses had polishing-induced defects.i.Construct a 95% confidence interval on the difference of the proportion polishing-induced defects between the first and second polishing solutions.UTMii.Based on the result in part (i), is there any indication that both types of polishingsolutions have different effect on the ophthalmic lens? Justify your answer.OUTHUTM

Confidence interval are used to examine the range where the population parameter can occur. It has…

Answered: 3. Ophthalmic lens is used in optical…

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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A,B AND C
Previous studies have shown that playing video games can increase visual perception abilities on tasks presented in the gaming zone of the screen (within 5 degrees of the center). A graduate student is interested in whether playing video games increases peripheral visual perception abilities or decreases attention to peripheral regions because of focus on the gaming zone. For her study, she selects a random sample of 64 adults. The subjects complete a difficult spatial perception task to determine baseline levels of their abilities. After playing an action video game (a first-person combat simulation) for 1 hour a day over 10 days, they complete the difficult perception task for a second time. Before playing the action video game, the mean score in their accuracy on the spatial task was 0.42. After playing the action video game, the mean score was -0.08. The mean of the differences between each person's pre- and postscores was 0.5, with a standard deviation of the differences equal to…
Dr. Mackintosh believes a new olfactory therapy would be more successful in promoting weight loss among obese patients. His patients are first weighed and then randomly assigned to olfactory therapy, dance therapy, or a control condition. At the end of the three weeks, the amount of weight lost is recorded. The results indicate no significant difference in the amount of weight lost between the three conditions. If true differences existed between the conditions, but they were not detected, what kind of error occurred?
Please send me answer within 10 min!! I will rate you good for sure!! Please solve all the parts with explaination!! 1. A hospital introduces a new order-entry system and wishes to study the impact of this intervention on the number of medication-related adverse events before and after the intervention. Write a non-directional alternative hypothesis for this study. a. Dependent variable: b. Independent variable: c. Hypothesis:
I am testing whether a new group study technique improves PSYC 214 students’ final exam grades. In this situation, what would be a Type I error? What would be a Type II error?
In which of these research designs would you only control who gets an intervention and who does not? Experimental Cross-sectional Quasi-experimental Case-Control
Arthritis is a very commonly occurring affliction. It is a major cause of lost work time and often results in serious disability. Of the many types of arthritis, the most common type is osteoarthritis. This condition is frequently due to wear and tear in the joints and is more likely to be found in people over 50. It is very painful in the weight-bearing joints, such as the knees and hips. Cartilage wears away on the bone ends, causing pain and swelling. Osteoarthritis may develop after an injury such as a bone fracture or a joint dislocation. To reduce the amount of time osteoarthritis patients are absent from work, it is important for them to have effective pain relief. An experiment was conducted to compare the effectiveness of three new analgesics: A1, A2, and A3. A clinic evaluated a large group of patients and identified 45 patients with a moderate level of pain. Fifteen of the 45 persons were then randomly assigned to one of the three analgesics. The patients were then…
his question refers to excavations at a national monument. One question the archaeologists asked was: Is raw material used by prehistoric Indians for stone tool manufacture independent of the archaeological excavation site? Two different excavation sites gave the information in the following table. Use a chi-square test with 5% level of significance to test the claim that raw material used for construction of stone tools and excavation site are independent. Excavation Site Material Site A Site B Row Total Basalt 756 559 1315 Obsidian 92 103 195 Pedernal chert 514 521 1035 Other 88 91 179 Column Total 1450 1274 2724 (a) What is the level of significance? (b) Find the value of the chi-square statistic for the sample. (Round the expected frequencies to at least three decimal places. Round the test statistic to three decimal places.)
Photon is a training device that is designed to improve a user's reaction time. Similar devices have been criticized for being too easy to master, but the makers of Photon say that their device is built to give most users room to improve. The makers say that even among professional athletes, the proportion, , who can score the top ranking of "light speed" is less than 16%. A random sample of 110 professional athletes is chosen, and 14 score a ranking of "light speed" while using the device.Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the level of significance, to support the claim that the proportion of all professional athletes who can score a ranking of "light speed" is less than 16% .
Many university admission committees use the GMAT score as one of the critical indicators of how well a student is likely to perform in an MBA program. However, the GMAT might not be a very strong indicator for all MBA programs. Suppose that an MBA program designed for middle managers who wish to upgrade their skills was launched 3 years ago. To judge how well the GMAT scores predict MBA performance, a sample of 12 graduates was taken. Their GPA in the MBA program (values 0 to 12) and their GMAT scores (values ranging from 200 to 800) are listed below. Compare the covariance and the correlation coefficient. Interpret your findings. GMAT GPA 599 9.6 689 8.8 584 7.4 631 10.0 594 7.8 643 9.2 656 9.6 594 8.4 710 11.2 611 7.6 593 8.8 683 8.0

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