1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
GenaCL600 [577]
3 years ago
13

The U.S. Census Bureau conducts a study to determine the time needed to complete the shortform. The Bureau surveys 200 people. T

he sample mean is 8.2 minutes. There is a knownstandard deviation of 2.2 minutes. The population distribution is assumed to be normal.Identify the following:x¯= _____σ= _____n= _____
Mathematics
1 answer:
pychu [463]3 years ago
8 0

Answer:

Step-by-step explanation:

Download docx
You might be interested in
Tính tích phân sau bằng cách dùng tọa độ cực I=∫∫ <img src="https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B%5Csqrt%7Bx%5E%7B2%7D%20%2B
xenn [34]

It sounds like <em>R</em> is the region (in polar coordinates)

<em>R</em> = {(<em>r</em>, <em>θ</em>) : 2 ≤ <em>r</em> ≤ 3 and 0 ≤ <em>θ</em> ≤ <em>π</em>/2}

Then the integral is

\displaystyle \iint_R\frac{\mathrm dx\,\mathrm dy}{\sqrt{x^2+y^2}} = \int_0^{\pi/2}\int_2^3 \frac{r\,\mathrm dr\,\mathrm d\theta}{\sqrt{r^2}} \\\\ = \int_0^{\pi/2}\int_2^3 \mathrm dr\,\mathrm d\theta \\\\ = \frac\pi2\int_2^3 \mathrm dr \\\\ = \frac\pi2r\bigg|_2^3 = \frac\pi2 (3-2) = \boxed{\frac\pi2}

5 0
3 years ago
N-m-m; use m=6,and n=-5
mixas84 [53]
(-5)-(6)-(6)
-5+-6
-11+-6
-17
-17 is the answer you are looking for.
8 0
3 years ago
The average amount of time it takes Greg to mow x lawns can be defined by the expression 28x + 5. In this scenario, what does th
inna [77]

Answer:

the answer is 140 hope this helped

6 0
3 years ago
HELP PLEASE PLEASE PLEASE
CaHeK987 [17]

Answer:

If you beg for help like that you won't get any.

Step-by-step explanation:

6 0
3 years ago
Heeeeelp Find the distance of AB if A (2, 6) and B (-5, 2).
evablogger [386]

Answer:

let A (2, 6) be (x1, y1)

B (-5, 2)  be (x2, y2)

distance AB =√[(x2 - x1)² + (y2 - y1)²]

                    √[(-7)²+ (-4)²]

                   √65

                   

7 0
3 years ago
Other questions:
  • Figure 1 is dilated to get Figure 2.
    15·2 answers
  • Fatima wants to find the value of sin 0 given cot 0= 4/7 which identity should she use
    11·2 answers
  • Identify the variation as direct, inverse, joint or combined. s=c/t^3
    12·2 answers
  • WIlL MARK AS BRAINLIEST<br><br> Reduce to the simplest form:<br><br> -5/9+(-7/12)=
    15·2 answers
  • MATH PPL* HELP PLS*
    5·1 answer
  • What is eight fifths reduced to lowest terms?
    14·1 answer
  • Divide 130 in the ratio 6:7
    13·2 answers
  • The circumference of a circle is 25π cm. What is the area, in square centimeters? Express your answer in terms of \piπ.
    11·2 answers
  • I need help graphing the rotation of 270° the polygon with the little check is correct the x that is over the whole graph mean t
    6·2 answers
  • Matthew buys x pens and two more pencils than pens.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!