Answer:
Step-by-step explanation:
Given : Sample size : n= 9
Degree of freedom = df =n-1 =8
Sample mean :
sample standard deviation :
Significance level ;
Since population standard deviation is not given , so we use t- test.
Using t-distribution table , we have
Critical value =
Confidence interval for the population mean :
90% confidence interval for the mean value will be :
Hence, the 90% confidence interval for the mean value=
The value of 4 in 34,258 is 10 times the value of the 4 in 47,163
The given study is observational study
To gauge how strongly two variables are related to one another, correlation coefficients are used.
A statistical indicator of the strength of the association between the relative movements of two variables is the correlation coefficient. The values are in the -1.0 to 1.0 range. There was a measurement error in the correlation if the estimated value was larger than 1.0 or lower than -1.0. Perfect negative correlation is shown by a correlation of -1.0, and perfect positive correlation is shown by a correlation of 1.0. A correlation of 0.0 indicates that there is no linear link between the two variables' movements. Finance and investing can benefit from the usage of correlation statistics.
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Answer:
6 salads
Step-by-step explanation:
There is 1/2 a cup of tomatoes in each salad Preston makes. He wants to make salads with 3 cups, so set up a proportion:
, where x is the number of salads he can make
Cross-multiply:
(1/2) * x = 3
x = 3 ÷ (1/2) = 6
He can make 6 salads.
6x + 8y..........................................................................................