Answer:
(5.240 ; 8.760)
Step-by-step explanation:
Given :
Sample mean, xbar = 7
Standard deviation, s = 2.29
Sample size, n = 9
95% confidence interval for the population mean :
Confidence interval :
Xbar ± Margin of error
Margin of Error = Tcritical * s/sqrt(n)
Tcritical at 0.05 ; df = 8 = 2.306
Margin of Error = 2.306 * 2.29/sqrt(9)
Margin of Error = 1.760
Lower boundary = (7 - 1.760) = 5.240
Upper boundary = (7 + 1.760) = 8.760
(5.240 ; 8.760)
Amazing i hope you have a spectacular day
Answer:
like the 3rd in the cycle
Step-by-step explanation:
The area of a circle is pi × radius^2.
Diameter / 2 = radius.
4 / 2 = 2
The radius is 2. Plug this value into the area formula.
A = pi(2)^2
Area = 12.57
Omg what grade are you in. wish I could help.
