What is the mean of 2,3?

A manufacturer of banana chips would like to know whether its bag filling machine works correctly at the 449 gram setting. It is

stealth61 [152]

Answer:

We accetp H₀

Step-by-step explanation:

Information:

Normal distribution

Population mean = μ₀ = 449

Population standard deviation σ unknown

Sample size n = 23 n < 30 we use t-student test

so n = 23 degree of fredom df = n - 1 df = 23- 1 df = 22

Sample mean μ = 448

Sample standard deviation s = 20

Significance level α = 0,05

1.-Hypothesis Test

Null hypothesis H₀ μ₀ = 449

Alternative hypothesis Hₐ μ₀ ≠ 449

Problem statement ask for determine decision rule for rejecting the null hypothesis. For rejecting the null hypothesis we have to get an statistic parameter wich implies that μ is bigger or smaller than μ₀

2.-Significance level α = 0,05 ; as we have a two tail test

α/2 = 0,025

Then from t - student table for df = 22 and 0,025 (two tail-test)

t(c) = ± 2.074

3.- Compute t(s)

t(s) = ( μ - μ₀ ) / s /√n

plugging in values

t(s) = (448 - 449) / 20 /√23 ⇒ t(s) = - 1*√23 /20

t(s) = - 0.2398

4.-Compare t(c) and t(s)

t(s) < t(c) - 0.2398 < - 2.074

Therefore t(s) in inside acceptance region. We accept H₀

7 0

4 years ago

How do you subtract an intteger from another integer?

MAXImum [283]

When you subtract an integer from an integer you add it Ex: -30-40=-70

7 0

3 years ago

Suppose that ln 2=a and ln3=b. Use properties of logarithms to write each logarithm in terms of a and b

Anettt [7]

The solution to the problem is as follows:

<span>ln(0.5) could be written as ln(2) - ln(2) - ln(2) = a - a - a = -a
</span>
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

3 0

4 years ago

Two students on bicycles leave their classroom building at 10:00 a.m. and travel in opposite directions. If the average speed of

Westkost [7]

Now... both are traveling in opposite direction
after some time "t", they cover altogether a distance of 65 miles
let's say, the one at 12mph cover a distance of "d",
thus
the other biker, cover the difference of that and 65, or 65-d
whatever "d" is

now, the time for both, is the exact same time,
since by the time they've covered 65 miles, let's say is
11:30am, is the same 11:30am for the first biker as well
as the second biker

$\bf \begin{array}{ccccllll}
&distance&rate(mph)&time(hrs)\\\\
&-----&-----&-------\\\\
\textit{first biker}&d&12&t\\
\textit{second biker}&65-d&14&t
\end{array}\\\\
-----------------------------\\\\
thus
\\\\

\begin{cases}
\boxed{d}=(12)(t)
\\\\
65-\boxed{d}=(14)(t)
\end{cases}$

now... do you see the substitution there?
so.. do that, and solve for "t"

3 0

3 years ago

(a) An object has a mass of 720 g and a density of 18 g/cm^3<br> volume of the object?

Setler [38]

Answer:

volume = mass / density

volume = 720 g / 18 g/cm³

volume = 40 cm³

Step-by-step explanation:

5 0

3 years ago