Answer: u = (41.659, 36.341)
Step-by-step explanation:
Constructing a 90% confidence interval for mean is given by the formulae below.
u = x + Zα/2 * σ/√n...... This is the upper limit
u = x - Zα/2 * σ/√n........ This is the lower limit.
u = population mean
x = sample mean = 39
σ = population standard deviation = 9
Zα/2 = Z score for a two tailed test with an a level of significance = 1.645 ( for 90% confidence level)
Upper limit
u = 39 + 1.645 * (9/√31)
u = 39 + 1.645 * (1.616)
u = 39 + 2.6590
u = 41.659
Lower limit
u = 39 - 1.645 * (9/√31)
u = 39 - 1.645 * (1.616)
u = 39 - 2.6590
u = 36.341
Answer: option d because it still has a negative sign from the numerator.
Step-by-step explanation:
I apologize if I am wrong I am a bit rusty with these problems
I guess you can report my answer if you want to but just letting you know that I am a little rusty
Answer:
the slope of function A is less than the slope of function B because 1/4 <1
(3x + 14) (3x + 14) = 9x^2 + 24x + 16