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20 points 1) Capnophillc baaequre ovgento grow. Based on 11 samples of these bacteria,the average oxygen needed was found to be 15 mg/L. The lab technician knows the standard deviation from experienc...
1. A population has a mean of 60 and a standard deviation of 30. Samples of...
1. A population has a mean of 60 and a standard deviation of 30. Samples of size 16 are randomly selected. Calculate the standard deviation of the sample distribution X. 2. Samples of size 16 are drawn from a population. the sampling distribution for X has a standard deviation of 0.25. Find the standard deviation of the population. 4. Tires are found to have a mean life of 40,000 miles. The standard deviation is 8000. A sample of 400 is...
The following data represent the concentration of dissolved organic carbon (mg/L) collected from 20 samples of...
The following data represent the concentration of dissolved organic carbon (mg/L) collected from 20 samples of organic soil. Assume that the population is normally distributed Complete parts (a) through (c) on the right 15.42 29.80 27.10 16.51 15.42 8.81 15.42 20.46 14.90 33.67 30.91 14.86 1750 15.35 9.72 19.80 14.86 8.09 15.42 18.30 (a) Find the sample mean The sample meanis L (Round to two decimal places as needed.) (b) Find the sample standard deviation The sample standard deviation is...
Question 1. The pH of 20 randomly selected lakes is measured. Their average pH is 5.7....
Question 1. The pH of 20 randomly selected lakes is measured. Their average pH is 5.7. Part A. Historically the standard deviation in the pH values is 0.9. Use this standard deviation for the following questions. Part Ai. Build a 95% confidence interval for the population mean lake pH. Part Ali. Build a 90% confidence interval for the population mean lake pH. Part Alli. Build an 80% confidence interval for the population mean lake pH. Part Aiv. Compare the intervals...
The following data represent the concentration of dissolved organic carbon (m/L) collected from 20 samples of...
The following data represent the concentration of dissolved organic carbon (m/L) collected from 20 samples of organic soil Assume that the population is normaly distributed. Complete parts (a) through (c) on the right 5.20 8.81 30.91 9.80 29.80 17.50 4.86 14.86 27.10 20.46 20.46 8.09 16.51 14.90 15.35 20.46 1687 33.67 9.72 18.30 (a) Find the sample mean The sample mean is Round to two decimal places as needed) (b) Find the sample standard deviation. The sample standard deviation is...
The state standard for Chemical X in the American River is 20 mg/L. You measure six...
The state standard for Chemical X in the American River is 20 mg/L. You measure six samples from the water and get the results shown below. Based on calculations of the appropriate confidence intervals, state whether you are (or are not) 95% certain that the river meets the standards. Explain your reasoning. Are you 99% certain? Repeat the calculation as needed and explain your reasoning. You don't have to write out the details of the mean and standard deviation calculations:...
17 and 18 please. Thank you. gleater than 700 pounds? DIe 81 31 female giraffes are chosen. The mean height is found to be 15 feet. Assume that the population standard deviation for the height of...
17 and 18 please. Thank you.
gleater than 700 pounds? DIe 81 31 female giraffes are chosen. The mean height is found to be 15 feet. Assume that the population standard deviation for the height of female giraffes is。 5 feet. Calculate the 85% confidence interval of for population mean height of female giraffes. 16) A sample of 21 male giraffes are chosen. The mean height is found to be 17.5 feet. The standard deviation of the sample is found...
problems 4, 5, 6, 11 and 13 If the population standard deviation was doubled to 10.4...
problems 4, 5, 6, 11 and 13
If the population standard deviation was doubled to 10.4 and the level of confidence remained at 90%, what would be the new margin of error and confidence interval Margin of error, E. Confidence interval: 20.11<x<34.31 O Did the confidence interval increase or decrease and why? increase 4. Definition of Confidence Intervals (Section 6.1) Circle your answer, True of False. • A 99% confidence interval means that there is a 99% probability that the...
l MetroPCS LTE 10:32 AM 65% X Lab 11 Means Samples Inference.pdf 3. The dictary content...
l MetroPCS LTE 10:32 AM 65% X Lab 11 Means Samples Inference.pdf 3. The dictary content of hyperactive boys was comparod with the dictary content of a contrel group. The protein intake (in grams) is measured over a specific time period. The sample of 12 hyperactive boys had a mean protein intake of 70 pams and standard deviation of 14 grams, whereas an independent sample of 14 mon-hyperactive boys (the control group) had a intake of 7 and a standard...
In a group of 15 young professionals studied, it was found that they purchased on average...
In a group of 15 young professionals studied, it was found that they purchased on average $186.498 per month eating meals prepared outside the home, with a standard deviation of $30.392. What is the 99% confidence interval of the true amount of money young professionals spend monthly on meals prepared outside the home? 1) ( 163.138 , 209.858 ) 2) ( 183.521 , 189.475 ) 3) ( 163.372 , 209.624 ) 4) ( -163.138 , 209.858 ) 5) ( 178.651...
#2 please Problem (12 points) Test at 0.05 significance level the claim in a college catalog...
#2 please
Problem (12 points) Test at 0.05 significance level the claim in a college catalog that the mean price of a textbook at the college bookstore is less than 575. Assume that the prices of textbooks are normally distributed From a random sample of 16 textbooks, a mean of $70.41 with a standard deviation of $19.70, were obtained Problem #2 (12 points) A sample of 54 bears from Yellowstone National Park produces a mean weight of 182.91b. Assuming that...
The following data represent the concentration of dissolved organic carbon (mg/L) collected from 20 samples of organic soil. Assume that the population is normally distributed Complete parts (a) through (c) on the right 15.42 29.80 27.10 16.51 15.42 8.81 15.42 20.46 14.90 33.67 30.91 14.86 1750 15.35 9.72 19.80 14.86 8.09 15.42 18.30 (a) Find the sample mean The sample meanis L (Round to two decimal places as needed.) (b) Find the sample standard deviation The sample standard deviation is...
Question 1. The pH of 20 randomly selected lakes is measured. Their average pH is 5.7. Part A. Historically the standard deviation in the pH values is 0.9. Use this standard deviation for the following questions. Part Ai. Build a 95% confidence interval for the population mean lake pH. Part Ali. Build a 90% confidence interval for the population mean lake pH. Part Alli. Build an 80% confidence interval for the population mean lake pH. Part Aiv. Compare the intervals...
The following data represent the concentration of dissolved organic carbon (m/L) collected from 20 samples of organic soil Assume that the population is normaly distributed. Complete parts (a) through (c) on the right 5.20 8.81 30.91 9.80 29.80 17.50 4.86 14.86 27.10 20.46 20.46 8.09 16.51 14.90 15.35 20.46 1687 33.67 9.72 18.30 (a) Find the sample mean The sample mean is Round to two decimal places as needed) (b) Find the sample standard deviation. The sample standard deviation is...
The state standard for Chemical X in the American River is 20 mg/L. You measure six samples from the water and get the results shown below. Based on calculations of the appropriate confidence intervals, state whether you are (or are not) 95% certain that the river meets the standards. Explain your reasoning. Are you 99% certain? Repeat the calculation as needed and explain your reasoning. You don't have to write out the details of the mean and standard deviation calculations:...
17 and 18 please. Thank you.
gleater than 700 pounds? DIe 81 31 female giraffes are chosen. The mean height is found to be 15 feet. Assume that the population standard deviation for the height of female giraffes is。 5 feet. Calculate the 85% confidence interval of for population mean height of female giraffes. 16) A sample of 21 male giraffes are chosen. The mean height is found to be 17.5 feet. The standard deviation of the sample is found...
problems 4, 5, 6, 11 and 13
If the population standard deviation was doubled to 10.4 and the level of confidence remained at 90%, what would be the new margin of error and confidence interval Margin of error, E. Confidence interval: 20.11<x<34.31 O Did the confidence interval increase or decrease and why? increase 4. Definition of Confidence Intervals (Section 6.1) Circle your answer, True of False. • A 99% confidence interval means that there is a 99% probability that the...
l MetroPCS LTE 10:32 AM 65% X Lab 11 Means Samples Inference.pdf 3. The dictary content of hyperactive boys was comparod with the dictary content of a contrel group. The protein intake (in grams) is measured over a specific time period. The sample of 12 hyperactive boys had a mean protein intake of 70 pams and standard deviation of 14 grams, whereas an independent sample of 14 mon-hyperactive boys (the control group) had a intake of 7 and a standard...
#2 please
Problem (12 points) Test at 0.05 significance level the claim in a college catalog that the mean price of a textbook at the college bookstore is less than 575. Assume that the prices of textbooks are normally distributed From a random sample of 16 textbooks, a mean of $70.41 with a standard deviation of $19.70, were obtained Problem #2 (12 points) A sample of 54 bears from Yellowstone National Park produces a mean weight of 182.91b. Assuming that...
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