consider the following haypothesis
Ho: =20
Ha: =20
5 answers
It is impossible to determine what the hypothesis is referring to based on the given information "=20". More contextual information is needed to understand the hypothesis.
The following data are from simple random sample 5,8,10,14
A, what is the point estimate of the population mean
B, what is the point estimate of the population standard devition
A, what is the point estimate of the population mean
B, what is the point estimate of the population standard devition
A) The point estimate of the population mean is calculated by taking the average of the sample.
Point estimate of population mean = (5 + 8 + 10 + 14) / 4 = 37 / 4 = 9.25
B) The point estimate of the population standard deviation is calculated using the sample standard deviation formula.
First, calculate the sample mean:
Sample mean = (5 + 8 + 10 + 14) / 4 = 37 / 4 = 9.25
Next, calculate the sample variance:
Sample variance = ((5-9.25)^2 + (8-9.25)^2 + (10-9.25)^2 + (14-9.25)^2) / (4-1)
= (18.5625 + 1.0625 + 0.0625 + 20.0625) / 3
= 40.75 / 3
= 13.5833
Finally, calculate the sample standard deviation:
Sample standard deviation = √(Sample variance) = √(13.5833) ≈ 3.68
Point estimate of population mean = (5 + 8 + 10 + 14) / 4 = 37 / 4 = 9.25
B) The point estimate of the population standard deviation is calculated using the sample standard deviation formula.
First, calculate the sample mean:
Sample mean = (5 + 8 + 10 + 14) / 4 = 37 / 4 = 9.25
Next, calculate the sample variance:
Sample variance = ((5-9.25)^2 + (8-9.25)^2 + (10-9.25)^2 + (14-9.25)^2) / (4-1)
= (18.5625 + 1.0625 + 0.0625 + 20.0625) / 3
= 40.75 / 3
= 13.5833
Finally, calculate the sample standard deviation:
Sample standard deviation = √(Sample variance) = √(13.5833) ≈ 3.68
Simple random sample of 50items from apopulationwhith=6resultedinsamplemean32
A,providea90 confidence interval for the population mean
B,providea95 confidence interval for the population mean
C,providea95 confidence interval for the populationmean
A,providea90 confidence interval for the population mean
B,providea95 confidence interval for the population mean
C,providea95 confidence interval for the populationmean
To calculate the confidence intervals for the population mean, we need to know the sample standard deviation. Unfortunately, this information is missing from the given data. Without the sample standard deviation, we cannot calculate the confidence intervals.