Pop. Mean Stand. Dev. Sample size 1 73.00 10.00 6.00 14 2 62.50 8 1.Independent random samples are selected from two populations. Below are selected summary statistics. (a) Construct the 95% confidence interval for μx-µY. (b) Obtain the P-value for the alternative µx =µY.
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- Also find the p value and test statistic8.1.2 If X = 148, o = 27, and n = 30, construct a 99% confidence interval estimate of the population mean, u. (Round to two decimal places as needed.)Question: In a certain factory there are two independent processes manufacturing the same item. The average weight in a sample of 250 items produced from one process is found to be 120 ozs. with a standard deviation of 12 ozs. while the corresponding figures in a sample of 400 items from the other process are 124 and 14. Obtain the standard error of difference between the two sample means. Is this difference significant ? Also find the 99% confidence limits for the difference in the average weights of items produced by the two processes respectively.
- You may need to use the appropriate appendx table or technology to answer this question A 95% confidence interval for a population mean was reported to be 147.29 to 156.71Ife 15, what sample size was used in this study? (Round your answer to the nearest integer.) Enter a number Need Help? MasterWhat are the Confidence Intervals for the Population Mean?An insurance agent claims that the average age of Age last Number of policy-holders who insure through him is less than the average age for all birthday (yrs) the agents, which is 30-5 years. A random sample of 100 policy-holders who had insured through him gave the adjoining age distribution. Calculate the mean and standard deviation of the sample and use it to test the claim that the average is less than the figure for all the agents at 5% level of significance persons 16-20 12 21-25 22 26 30 20 31-35 30 36-40 16
- If MLR 1-4 hold, then OLS estimators are correct are unbiased and inconsistent equal to the population parameter unbiased and consistentPopulation Sample 35 30 24 32 32 28 35 31 34 20 24 24 26 29 32 35 32 37 35 Using sample data determine the Sample Mean?Assuming normality, contruct and interpret a 90% confidence interval for the average monthly earning from Toyota Vehicles.
- 1. The manager at Bell's Gym wants to know the proportion of members who use the Cardio Machines. A sample of 260 members showed that 40 of them use cardio machines. Calculate a 97% confidence interval for the proportion of members who use the cardio machines.Find the confidence interval for estimating the population proportion for parts (a) through (c). a. 90% confidence level; n = 500; p=0.30 b. 95% confidence level; n = 220; p=0.04 c. α = 0.07; n = 345; p=0.50 Click the icon to view the standard normal table of the cumulative distribution function. a. The confidence interval isQuestion: Godrej soap manufacturing company was distributing a particular brand of soap through a large number of retail shops. Before a heavy advertisement campaign, the mean sales per week per shop was 140 dozens. After the campaign, a sample of 26 shops was taken and the mean sales was found to be 147 dozens with standard deviation 16. Can you consider the advertisement effective?SEE MORE QUESTIONS