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The mean solory reported in a sample of 1,000 early childhood education teachers was $32,245. The...
The Digest of Education Statistics in 2012 reported that a sample of 27 teachers found that...
The Digest of Education Statistics in 2012 reported that a sample of 27 teachers found that the sample mean salary was $56,410, and that the sample standard deviation was $15,000 (note that we only have the sample standard deviation now...) (a) what is the 90% confidence interval for the population mean? (b) what is the 90% confidence interval for the population standard deviation?
State A State B $52,245 $55,021 Sample mean Sample size Population standard Salary data from two...
State A State B $52,245 $55,021 Sample mean Sample size Population standard Salary data from two random samples of high school teachers are shown to the right. Also shown are the population standard deviations. 44 49 $6,525 $6,877 deviation a. Construct a 95% confidence interval to estimate the difference in the average salaries of the high school teachers in these two states b. Based on the results in part a, can you conclude that a difference exists in the average...
An article reported that for a sample of 54 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO2 level (ppm) was 654.16, and the sample standard deviation was...
An article reported that for a sample of 54 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO2 level (ppm) was 654.16, and the sample standard deviation was 162. a) Calculate and interpret a 95% two sided answers to two decimal places.) confidence interval for true average CO2 level n the population of a homes from hich the sample as selected Round your ppm Interpret the resulting interval o we are 95% confident that the...
17. Teacher salaries: A random sample of 50 public school teachers in Georgia had a mean...
17. Teacher salaries: A random sample of 50 public school teachers in Georgia had a mean annual salary of $48,300. Assume the population standard deviation is σ = $8,000. Can you conclude that the mean salary of public school teachers in Georgia differs from $50,000? Use the α = 0.01 level of significance.
A 95% confidence interval for a population mean was reported to be 150 to 160 ....
A 95% confidence interval for a population mean was reported to be 150 to 160 . If standard deviation = 17, what sample size was used in this study? (Round your answer to next whole number.)
Please Help with BOTH 1) 2) An article reported that for a sample of 56 kitchens...
Please Help with BOTH
1)
2)
An article reported that for a sample of 56 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO2 level (ppm) was 654.16, and the sample standard deviation was 163.36. (a) Calculate and interpret a 95% (two-sided) confidence interval for true average CO2 level in the population of all homes from which the sample was selected. (Round your answers to two decimal places.) ppm Interpret the resulting interval. We are...
the mean price is $2.78. Please 4) A sample of 16 overweight people uses a new...
the mean price is $2.78. Please 4) A sample of 16 overweight people uses a new reducing pill for 6 weeks and has a mean weight loss of 25 lbs. The standard deviation is 8 lbs. a) Find a 95% confidence interval for the mean weight loss. b) If the same information was found using a sample of 50, how would that affect the length of the confidence interval? 5) A study is taken to see if teacher's salaries are...
The random sample data analysis showed that the mean salary of 40 elementary school teachers in...
The random sample data analysis showed that the mean salary of 40 elementary school teachers in study showed $28,500. Is the sample data within or out of the 95% CI the reference information (a mean of $27,000 and a standard deviation of $2,000)? Show me the process how to prove true or false on this statement (use 95% CI).
An article reported that for a sample of 59 kitchens with gas cooking appliances monitored during...
An article reported that for a sample of 59 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO2 level (ppm) was 654.16, and the sample standard deviation was 164.04. (a) Calculate and interpret a 95% (two-sided) confidence interval for true average CO2 level in the population of all homes from which the sample was selected. (Round your answers to two decimal places.) (611.41 696.91 pm Interpret the resulting interval. We are 95% confident that this...
A confidence interval for a population mean was reported to be to . If , what sample size...
A confidence interval for a population mean was reported to be to . If , what sample size was used in this study? (Round your answer to next whole number.)
State A State B $52,245 $55,021 Sample mean Sample size Population standard Salary data from two random samples of high school teachers are shown to the right. Also shown are the population standard deviations. 44 49 $6,525 $6,877 deviation a. Construct a 95% confidence interval to estimate the difference in the average salaries of the high school teachers in these two states b. Based on the results in part a, can you conclude that a difference exists in the average...
An article reported that for a sample of 54 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO2 level (ppm) was 654.16, and the sample standard deviation was 162. a) Calculate and interpret a 95% two sided answers to two decimal places.) confidence interval for true average CO2 level n the population of a homes from hich the sample as selected Round your ppm Interpret the resulting interval o we are 95% confident that the...
Please Help with BOTH
1)
2)
An article reported that for a sample of 56 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO2 level (ppm) was 654.16, and the sample standard deviation was 163.36. (a) Calculate and interpret a 95% (two-sided) confidence interval for true average CO2 level in the population of all homes from which the sample was selected. (Round your answers to two decimal places.) ppm Interpret the resulting interval. We are...
the mean price is $2.78. Please 4) A sample of 16 overweight people uses a new reducing pill for 6 weeks and has a mean weight loss of 25 lbs. The standard deviation is 8 lbs. a) Find a 95% confidence interval for the mean weight loss. b) If the same information was found using a sample of 50, how would that affect the length of the confidence interval? 5) A study is taken to see if teacher's salaries are...
An article reported that for a sample of 59 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO2 level (ppm) was 654.16, and the sample standard deviation was 164.04. (a) Calculate and interpret a 95% (two-sided) confidence interval for true average CO2 level in the population of all homes from which the sample was selected. (Round your answers to two decimal places.) (611.41 696.91 pm Interpret the resulting interval. We are 95% confident that this...
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