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2. Six measurements were made of the mineral content (in percent) of spinach, with the following...
Question 7 (2 points) Six measurements were made of the mineral content (in percent) of spinach,...
Question 7 (2 points) Six measurements were made of the mineral content (in percent) of spinach, with the following results. It is reasonable to assume that the population is approximately normal. 19.1, 20.1, 20.8, 20.0 20.5, 21.6 Find the lower bound of the 95% confidence interval for the true mineral content. Round to three decimal places (for example: 20.015). Write only a number as your answer. Do not write any units.
Question 7 (4.2 points) A simple random sample of electronic components will be selected to test...
Question 7 (4.2 points) A simple random sample of electronic components will be selected to test for the mean lifetime in hours. Assume that component lifetimes are normally distributed with population standard deviation of 20 hours. How many components must be sampled so that a 99% confidence interval will have margin of error of 6 hours? Write only an integer as your answer. Question 8 (5 points) Six measurements were made of the mineral content (in percent) of spinach, with...
Scientists want to estimate the mean weight of mice after they have been fed a special...
Scientists want to estimate the mean weight of mice after they have been fed a special diet. From previous studies, it is known that the weight is normally distributed with standard deviation 5 grams. How many mice must be weighed so that a 95% confidence interval will have margin of error of 0.6 grams? Write only an integer as your answer. Six measurements were made of the mineral content (in percent) of spinach, with the following results. It is reasonable...
Six measurements were made of the magnesium ion concentration (in parts per million, or ppm) in...
Six measurements were made of the magnesium ion concentration (in parts per million, or ppm) in a city's municipal water supply, with the following results. It is reasonable to assume that the population is approximately normal. 188 135 160 173 183 168 Construct a 95% confidence interval for the mean magnesium ion concentration. A) 165.0 < µ < 170.7 B)164.7 < µ < 171.0 C)147.9 < µ < 187.8 D) 146.0 < µ < 189.7
Six measurements were made of the magnesium ion concentration (in parts per million, 21) or ppm)...
Six measurements were made of the magnesium ion concentration (in parts per million, 21) or ppm) in a city's municipal water supply, with the following results. It is reasonable to assume that the population is approximately normal. 188 135 160 173 183 168 Construct a 95% confidence interval for the mean magnesium ion concentration. A) 165.0 < μ < 170.7 B) 164.7 < μ < 171.0 C) 147.9 < μ < 187.8 D) 146.0 < μ < 189.7
Results (in grrandom from a candy production line, were analyzed to determine their sugar content. Results...
Results (in grrandom from a candy production line, were analyzed to determine their sugar content. Results (in grams) are summarized in th Nine samples, collected at these data to address the questions below 1. Which of the following methods would you recommend to determine 4 e following list: 15.60,15.47,14.71,15.07,15.20,16.21,15.69,15.30,15.30. Use if these data are reasonably normally distributed? a. Create a normal probability plot b. Create a histogram c. Transformation to a standard Z variable d. Plot the lognormal distribution 2....
Assuming that the population is normally distributed, construct a 99% confidence interval for the population mean,...
Assuming that the population is normally distributed, construct a 99% confidence interval for the population mean, based on e ollowing sample sizeof 1, 2, 3, 4, 5, 6, 7, and 25 In the given data, replace the value 25 with 8 and recalculate the confidence interval. Using these results, describe the effect of an outlier (that is, an extreme value) on the confidence interval, in general. Find a 99% confidence interval for the population mean, using the formula or technology....
Construct a 99% confidence interval to estimate the population mean using the following data. What assumptions...
Construct a 99% confidence interval to estimate the population mean using the following data. What assumptions need to be made to construct this interval? x=88 20 n 11 What assumptions need to be made to construct this interval? Tre O A. The population mean will be in the confidence interval. en OB. The sample size is less than 30. et c . The population must be normally distributed. D. The population is skewed to one side. With 99% confidence, when...
The following measurements (in picocuries per liter) were recorded by a set of carbon monoxide detectors...
The following measurements (in picocuries per liter) were recorded by a set of carbon monoxide detectors installed in a waste disposal facility: 487.4,473.8,534.3 Using these measurements, construct a 95% confidence interval for the mean level of carbon monoxide present in the facility. Assume the population is approximately normal. step 1: sample mean round two decimal places step 2 sample standard deviation two decimal places step 3 find critical vaue of confidence level round three decimal places step 4 contruct the...
Given two independent random samples with the following results: n1=16x‾1=157s1=25 n2=8x‾2=192s2=15 Use this data to find...
Given two independent random samples with the following results: n1=16x‾1=157s1=25 n2=8x‾2=192s2=15 Use this data to find the 99% confidence interval for the true difference between the population means. Assume that the population variances are equal and that the two populations are normally distributed. Step 3 of 3 : Construct the 99% confidence interval. Round your answers to the nearest whole number.
Question 7 (2 points) Six measurements were made of the mineral content (in percent) of spinach, with the following results. It is reasonable to assume that the population is approximately normal. 19.1, 20.1, 20.8, 20.0 20.5, 21.6 Find the lower bound of the 95% confidence interval for the true mineral content. Round to three decimal places (for example: 20.015). Write only a number as your answer. Do not write any units.
Question 7 (4.2 points) A simple random sample of electronic components will be selected to test for the mean lifetime in hours. Assume that component lifetimes are normally distributed with population standard deviation of 20 hours. How many components must be sampled so that a 99% confidence interval will have margin of error of 6 hours? Write only an integer as your answer. Question 8 (5 points) Six measurements were made of the mineral content (in percent) of spinach, with...
Scientists want to estimate the mean weight of mice after they have been fed a special diet. From previous studies, it is known that the weight is normally distributed with standard deviation 5 grams. How many mice must be weighed so that a 95% confidence interval will have margin of error of 0.6 grams? Write only an integer as your answer. Six measurements were made of the mineral content (in percent) of spinach, with the following results. It is reasonable...
Results (in grrandom from a candy production line, were analyzed to determine their sugar content. Results (in grams) are summarized in th Nine samples, collected at these data to address the questions below 1. Which of the following methods would you recommend to determine 4 e following list: 15.60,15.47,14.71,15.07,15.20,16.21,15.69,15.30,15.30. Use if these data are reasonably normally distributed? a. Create a normal probability plot b. Create a histogram c. Transformation to a standard Z variable d. Plot the lognormal distribution 2....
Assuming that the population is normally distributed, construct a 99% confidence interval for the population mean, based on e ollowing sample sizeof 1, 2, 3, 4, 5, 6, 7, and 25 In the given data, replace the value 25 with 8 and recalculate the confidence interval. Using these results, describe the effect of an outlier (that is, an extreme value) on the confidence interval, in general. Find a 99% confidence interval for the population mean, using the formula or technology....
Construct a 99% confidence interval to estimate the population mean using the following data. What assumptions need to be made to construct this interval? x=88 20 n 11 What assumptions need to be made to construct this interval? Tre O A. The population mean will be in the confidence interval. en OB. The sample size is less than 30. et c . The population must be normally distributed. D. The population is skewed to one side. With 99% confidence, when...
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