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=
Answer: 3k -4
Step-by-step explanation: Just multiply 1/2 by both terms in the expression.
It's kind of both because word form would be Seventy thousand and standard form would be 70,000.
Check the picture below.
the "red" pair of sides are congruent, notice, both are 3 and 5 units in length respectively.