What is the best thing to do when the result failed to meet statistical significance but had a large-sized effect?
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- During the filling process of a sunflower oil bottling facility, 8 milk bottles were weighed and the variance was found to be 10 g. What is the lower limit of this filling process with 90% confidence?8 holes drilled on a lathe were measured and its variance was found to be 2.81 cm. What is the tabular value of the upper bound of the confidence interval with 90% confidence of its variance?A lamp manufacturer company tests the 2 new models of LED spotlights for commercial use trying to decide between 2 models. At the moment, the shelf life tests are carried out as shown in the table.Perform a one-sample one-way ANOVA test to compare lifespan between focus models with a 95% confidence level. Without using Excel.
- A lamp manufacturer company tests the 2 new models of LED spotlights for commercial use trying to decide between 2 models.At the moment, the shelf life tests are carried out as shown in the table.Perform a one-sample one-way ANOVA test to compare lifespan between focus models with a 95% confidence level.From a random sample of 49 high school seniors, the sample mean and standarddeviation of the math scores are found to be 94 and 16 respectively. Determine a90% confidence interval for the mean math score of all seniors in the school.A marine biologist is interested in whether the chinook salmon a particular species of salmon in the North Pacific Northwest are getting smaller within the last decade. In a random sample of these species of salmon she found the mean length of 36" with the margin of error 9". Construct a confidence interval for the mean of chinook salmon.
- Find X2left and X2right for a 90% confidence interval using the chi-square distribution with 15 degrees of freedom.A sample of 6 credit ratings for car loan applicants has a mean of 602 and a variance of 4356. Use the data toconstruct a 90% confidence interval for the population standard deviation of credit scores for all applicantsfor car loans. What is the Best point estimate and Include the written statementTwo suppliers manufacture a plastic gear used in a laser printer. The impact strength of these gears measured in foot-pounds is an important characteristic. A random sample of 10 gears from supplier 1 results in x₁ = 290 and s₁ = 12, and another random sample of 16 gears from the second supplier results in x₂ = 321 and s₂ = 22. Construct a 95% confidence interval estimate for the difference in mean impact strength and explain how this interval could be used to answer the question posed regarding supplier-to- supplier differences. Assume that both populations are normally distributed but the variances are not equal (Case 2: o² #02) O a. 17.175 <= u1-u2 <= 44.825. Because zero is contained in the confidence interval, we conclude that supplier 2 provides gears with a higher mean impact strength than supplier 1 with 90% confidence O b. None among the choices O c. 17.175 <= u1-u2 <= 44.825. Because zero is not contained in the confidence interval, we conclude that supplier 2 provides gears…
- A random of 15 freshmen takers obtained a mean score of 74 and a variance of 9 on a SASE. Assuming the scores to be normally distributed, construct a 95% confidence interval to estimate the variance of scores of the whole freshmen population.What value of k minimizes the root mean squared error (RMSE) on the validationdata?A researcher conducted 12 experiments to investigate the lifespan of a certain bacteria in an acidic solution. The collected data shows that the average lifespan of the bacteria is 184 hours with 10.0 hours standard deviation. Based on data what is 95% confidence interval for the mean lifespan of this bacteria in given conditions?