The F-test is sensitive to the assumption that the underlying samples are normally distributed. Select one: O True False
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Q: Is a statistics class' delivery type a factor in how well students do on the final exam? The table…
A: We need to test: Ho: u1=u2=u3 H1: At least two of the means differ from each other
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Q: Is a statistics class' delivery type a factor in how well students do on the final exam? The table…
A: Given: α=0.1 Hypothesis: H0: μ1=μ2=μ3 H1: At least one of the mean is different from the others.
Q: Is a statistics class' delivery type a factor in how well students do on the final exam? The table…
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Q: Is a statistics class' delivery type a factor in how well students do on the final exam? The table…
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- The manufacturer of LED lights would like to include as part of their advertising the number of hours an LED is expected to work. A sample of 20 lights revealed the following number of hours worked. 2698 2628 2474 2895 2672 2675 2486 2852 2733 2655 2765 2794 2486 2627 2624 2785 2692 2654 2518 2650 Draw normal probability plot for the above data and make comment. Assuming given data to be approximately normally distributed, Construct 90%, 95% and 99% confidence intervals for the mean number of hours that the LED lights of this brand has worked. Construct 90%, 95% and 99% confidence intervals for the standard deviation of the number of hours that the LED lights of this brand worked.Tiffany is a manager who needs to fire the worst performing 3% of employees. At her organization, employee performance is a normally distributed variable. Tiffany should fire employees who have a performance score that correspond with a z-score less than or equal to _____The expected value of a random variable X that is denoted by uis called its: a. median. O b. variance. mean. O d. mode.
- Is the distribution of marital categories in the GSS representative of their distributions in the population? Let’s assume that in the U.S.: married = 48%, widowed = 6%, divorced = 12%, separated = 2%, never married = 32%. In the 2018 GSS, MARITAL is coded: 1=married, 2=widowed, 3=divorced, 4=separated, and 5=never married. Interpret the output and provide the output from this test as a part of your answer. Discuss your interpretation of the results using APA format. 1.) Assumption? 2.) Level of measurement? 3.) Null hypothesis? 4.) Research hypothesis? 5.) Select the sampling distribution and establish the critical region? 6.) Compute the test statistics? 7.) Interpret the results using APA format? *Use the graphs inserted below in images.Is a statistics class' delivery type a factor in how well students do on the final exam? The table below shows the average percent on final exams from several randomly selected classes that used the different delivery types. Face-to-Face Hybrid Online 85 81 100 100 89 82 66 56 99 57 74 98 97 55 88 58 60 75 84 75 55 Assume that all distributions are normal, the three population standard deviations are all the same, and the data was collected independently and randomly. Use a level of significance of α=0.01. For this study, we should use ANOVA Your friend Stephanie helped you with the null and alternative hypotheses...H0: μ1=μ2=μ3H1: At least one of the mean is different from the others. The test-statistic for this data = (Please show your answer to 3 decimal places.) The p-value for this sample = (Please show your answer to 4 decimal places.)Is a statistics class' delivery type a factor in how well students do on the final exam? The table below shows the average percent on final exams from several randomly selected classes that used the different delivery types. Face-to-Face Hybrid Online 88 92 80 89 97 84 94 68 100 78 90 61 79 99 72 65 87 85 74 83 70 Assume that all distributions are normal, the three population standard deviations are all the same, and the data was collected independently and randomly. Use a level of significance of a = 0.01. Ert = T = I1 :H H1: At least two of the means differ from each other. 1. For this study, we should use Select an answer v 2. The test-statistic for this data = (Please show your answer to 3 decimal places.) 3. The p-value for this sample = (Please show your answer to 4 decimal places.) 4. The p-value is Select an answer 5. Base on this, we should Select an answer 6. As such, the final conclusion is that... | hypothesis O There is insufficient evidence to support the claim that…
- Service time for a customer coming through a checkout counter in a retail store is a random variable with the mean of 3.5 minutes and standard deviation of 3.5 minutes. Suppose that the distribution of service time is fairly close to a normal distribution. Suppose there are two counters in a store, n₁ = 2 customers in the first line and n₂ = 13 customers in the second line. Find the probability that the difference between the mean service time for the shorter line X₁ and the mean service time for the longer one X₂ is more than 0.1 minutes. Assume that the service times for each customer can be regarded as independent random variables. Round your answer to two decimal places (e.g. 98.76). P =A well known psychology graduate program claims that their Ph.D graduates get higher paying jobs than the national average. Last year’s figures for salaries paid to all graduates with D in Psychology on their first job showed a mean of P620.00 per hour. A random sample of 10 graduates from last year’s class showed the following hourly salaries for their first job. P540 P630 P720 P680 P640 P570 P580 P660 P670 P690 What can you conclude about the psychology graduate program’s claim? Show your complete computation and then answer the questionB. Explain the following: 1. What is a t-distribution? 2. When is a z-test and the t-test used?
- Determine if the outcome is unusual. Consider as unusual any result that differs from the mean by more than 2 standard deviations. That is, unusual values are either less than μ - 2σ or greater than μ + 2σ.According to AccuData Media Research, 36% of televisions within the Chicago city limits are tuned to "Eyewitness News" at 5:00 pm on Sunday nights. At 5:00 pm on a given Sunday, 2500 such televisions are randomly selected and checked to determine what is being watched. Would it be unusual to find that 919 of the 2500 televisions are tuned to "Eyewitness News"? Yes or No?A hospital wants to determine if the type of treatment for pneumonia is a factor in recovery time? The table below shows the number of days to recovery for several randomly selected pneumonia patients that had various types of treatment. Sent Home With Medicine A Few Hours in the Hospital Overnight Hospital Stay 14 21 17 12 22 7 16 11 13 27 10 19 15 8. 10 19 16 4 23 24 19 16 8 18 12 Assume that all distributions are normal, the three population standard deviations are all the same, and the data was collected independently and randomly. Use a level of significance of a = 0.05. Ho: µ1 = µ2 = 43 H1: At least two of the means differ from each other. 1. For this study, we should use Select an answer O 2. The test-statistic for this data = (Please show your answer to 3 decimal places.) 3. The p-value for this sample = (Please show your answer to 4 decimal places.) 4. The p-value is Select an answer 5. Base on this, we should Select an answer O hypothesis 6. As such, the final conclusion is…