Ask question

Ask question

All categories

2 years ago

14

A simple random sample of ten people is taken from the set of all registered voters in a given district to determine their avera

ge age. Which of the following is a reason why you can not make a statistical inference on the population?

2 answers:

zepelin [54]2 years ago

7 0

Answer:

The sample size is not appropriate.

The population isn’t given to be approximately normal. And for the following question, "A convenience sample of forty people is taken from a population. Which of the following is a reason why you can not make a statistical inference on the population?" The answer is The wrong sampling method was used.

Fudgin [204]2 years ago

5 0

Answer:

Answers are : (1st & 2nd choices)

• The sample size is not appropriate.

• The population isn't given to be approximately normal.

You might be interested in

A certain bag of potting soil is 1/4 peat moss, and the rest is dirt, what part is dirt

AVprozaik [17]

If you do the math you'll get 3/4 of the bag is dirt.

4 0

2 years ago

Read 2 more answers

The park shown is in the shape of a square. Is the perimeter rational or irrational? Area = 24,200 yd 2

dangina [55]

Answer:

irrational

Step-by-step explanation:

A = s^2

s^2 = 24,200

$s = \sqrt{24200}$

$s = \sqrt{242 \times 100}$

$s = \sqrt{100 \times 121 \times 2}$

$s = 10 \times 11\sqrt{2}$

$s = 110\sqrt{2}$

P = 4s

$P = 4 \times 100 \sqrt{2}$

$P = 440 \sqrt{2}$

The perimeter is irrational.

3 0

2 years ago

What is the area of the composite figure whose vertices have the following coordinates? (2, −2) , (2, 1) , (4, 2) , (6, 2) , (4,

jok3333 [9.3K]

we have that

using a graph tool

the answer is 36 units²

Have a great day :)

5 0

2 years ago

Read 2 more answers

Gareth has $2,000 to invest. Putting the money in a savings account at his local bank will earn him 2.2% annual interest and giv

Alenkinab [10]

Answer:

Option c. 18 withdrawals is correct

Step-by-step explanation:

Gareth has to invest = $2,000

His local bank gives 2.2% annual interest and gives him the ability to make ATM withdrawals without any charges.

In an online savings gives 4.85% annual interest, but charges $3 every time he makes an ATM withdrawal.

Let us find the amount of interest earned from the local bank.

The amount of interest earned from Local Bank = 2.2% of 2000

= $\frac{22}{100}$ × 2000

= 0.022 × 2000 = $44

The amount of interest earned from online savings = 4.85% of 2000

= $\frac{4.85}{100}$ × 2000

= 0.0485 × 2000 = $97

As it is given that savings account has no ATM withdrawal charges but online savings account charge $3.00 per withdrawal.

so we need to make x withdrawals from both accounts such that:

97 - 3x = 44

Let us solve for x.

Upon subtracting 97 from both sides of or equation we will get,

97 - 97 - 3x = 44 - 97

3x = -53

$\frac{3x}{-3}=\frac{-53}{-3}$

x = 17.666 rounded to 18

Therefore, Gareth must make 18 ATM withdrawals every year for the local savings account to be a better deal than the online savings account.

4 0

2 years ago

Which are the solutions of x2 = 19x + 1?

Finger [1]

Answer:

$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

Step-by-step explanation:

we have

$x^2=19x+1$

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-x^{2}-19x-1=0$

so

$a=1\\b=-19\\c=-1$

substitute in the formula

$x=\frac{-(-19)\pm\sqrt{-19^{2}-4(1)(-1)}} {2(1)}$

$x=\frac{19\pm\sqrt{365}} {2}$

$x=\frac{19+\sqrt{365}} {2}$

$x=\frac{19-\sqrt{365}} {2}$

$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

therefore

StartFraction 19 minus StartRoot 365 EndRoot Over 2 EndFraction comma StartFraction 19 + StartRoot 365 EndRoot Over 2 EndFraction

6 0

2 years ago

Read 2 more answers