Select the correct locations on the graph. select the lines that represent functions.

The compressive strength of concrete is being tested by a civil engineer who tests 12 specimens and finds that the sample mean i

ki77a [65]

Answer:

The 95% confidence interval for mean compressive strength is:

$3237.3\leq \mu\leq 3282.5$

Step-by-step explanation:

We have a sample of n=12 specimens, with sample mean=3259.9 and sample standard deviation = 35.57.

We know the population is normally distributed.

For a 95% confidence interval and df=n-1=11, the t-statistic is t=2.201.

Then, the CI can be expressed as:

$M-t*s/\sqrt{N}\leq \mu\leq M+t*s/\sqrt{N}\\\\3259.9-2.201*35.57/\sqrt{12}\leq \mu\leq 3259.9+2.201*35.57/\sqrt{12}\\\\ 3259.9-22.6\leq \mu\leq 3259.9+22.6\\\\3237.3\leq \mu\leq 3282.5$

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3 years ago

Let F(x) = 2x2 + x - 3 and g(x) = x - 1. f(x) g(x)

seraphim [82]

Answer:

Video result for Let F(x) = 2x2 + x - 3 and g(x) = x - 1. f(x) g(x) Find and state its domain. Answers: X - 1; domain is the set of all real numbers (x-1)/(2x + 3) ; domain is the set of all real numbers except-(3/2) 2x + 3; domain is the set of all real numbers except 16:39

How to find the range of a function (video)

Khan Academy · Khan Academy

Video result for Let F(x) = 2x2 + x - 3 and g(x) = x - 1. f(x) g(x) Find and state its domain. Answers: X - 1; domain is the set of all real numbers (x-1)/(2x + 3) ; domain is the set of all real numbers except-(3/2) 2x + 3; domain is the set of all real numbers except 18:07

Domain and range of quadratic functions (video)

Khan Academy · Khan Academy

Video result for Let F(x) = 2x2 + x - 3 and g(x) = x - 1. f(x) g(x) Find and state its domain. Answers: X - 1; domain is the set of all real numbers (x-1)/(2x + 3) ; domain is the set of all real numbers except-(3/2) 2x + 3; domain is the set of all real numbers except 11:47

Domain of a radical function (video)

Khan Academy · Khan Academy

Video result for Let F(x) = 2x2 + x - 3 and g(x) = x - 1. f(x) g(x) Find and state its domain. Answers: X - 1; domain is the set of all real numbers (x-1)/(2x + 3) ; domain is the set of all real numbers except-(3/2) 2x + 3; domain is the set of all real numbers except 14:57

Determining whether values are in domain of function (video)

Khan Academy · Khan Academy

Step-by-step explanation:

3 0

2 years ago

K/5 = 9/15 plz help mee

Molodets [167]

Answer:

k = 3

Step-by-step explanation:

Reduce the right side of the equation by 3 to get 3/5. Since both denominators now are even you should get 3 which is k as your answer.

5 0