ssumeCertain properties of the cleaning method mean that there is reason to suspect that the standarddeviation o is also different when using the new cleaning method. We shall therefore now assuthat o is also unknown. From the 16 measurements that gave an average of 19.8, a sample standarddeviation of s = 1.9 was obtained.a) Find a 95% confidence interval for g

According to the given information in this question We need to find 95% confidence interval

Answered: ssume Certain properties of the…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A random sample of size 100 is taken from a normal distribution population with sigmma=5.3 . give that the sample mean is x bar =21.8 construct a 98 % confidence interval for the position mean mu.( Round to two decimals)
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A random sample of 121 observation produced a sample mean 27.9 and given population standard deviation 2.8. (a) find a 90% confidence interval for μ. Round to 3 decimal places.
The average content of certain harmful substances downstream of the Han River is 0.6 mg/l, and the standard deviation for this is known to be 0.1 mg/l. As a result of the water quality improvement campaign for one year, we would like to find out whether the specific harmful substances have decreased. In order to collect 100 samples and reduce them to 95% confidence level, the average of the sample should be obtained below what value?
Compute a 95% confidence interval for the true population mean given the following 10 data that represent a sample of ceramics vessels with the following rim diameters (in centimeters), the sample mean to be x̄ = 15.3 cm and the sample standard deviation is s = 3.5 cm
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23) The records of 100 postal employees who volunteered for a study, showed that the average time these employees had worked for the postal service was x = standard deviation of the population of time postal service employees have spent with the postal service is approximately 8 years. Assume that we know that the normal with standard deviation o 5 years. A 95% confidence interval for the mean time u the population of postal service employees have spent with the postal service is:
A random sample of 25 observations selected from this population gave a mean equal to 143.72. The population is known to have a normal distribution with the standard deviation of 14.8. Using a 95% confidence level. Determine the following : a) the reliability factor. b) standard error. c) point estimate of mean d) confidence interval of mean.
A random sample of size 100 is taken from a normal distribution population with sigmma=4.3. give that the sample mean is x bar =19.8 construct a 95%confidence interval for the position mean mu.( Round to two decimals)
A simple random sample of 44 female cottonmouths yeilded the number of young per liter. The sample mean calculated to 7.59. Assume sigma = 2.4, obtain a 95% confidence interval for the mean number of young per litter of all female eastern cottonmouths.
An NHANES report gives data for 647 women aged 20–29 years. The BMI of these 647 women was x= 25.8. On the basis of this sample, we want to estimate the BMI u in the population of all 20.6 million women in this age group. We treated these data as an SRS from a Normally distributed population with standard deviation o = 7.1. (a) Give three confidence intervals for the mcan BMI u in this population, using 90%, 95%, and 99% confidence. Enter the lower and upper bound for the 90% confidence interval. (Enter your answers rounded to two decimal places. If you are using Crunchlt, adjust the default precision under Preferences as necessary. See the instructional video on how to adjust precision scttings.) lower bound = uррer bound Enter the lower and upper bound for the 95% confidence interval. (Enter your answers rounded to two decimal places. If you are using Crunchlt, adjust the default precision under Preferences as necessary. See the instructional video on how to adjust precision…

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