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3 years ago

14

True or false: randomization allows each member of the population to have an equal probability of being selected for the sample

population

1 answer:

tia_tia [17]3 years ago

4 0

Answer:

True

Step-by-step explanation:

Simple random sampling chooses at random members of the population. This allows all members an equal probability of being selected for the sample.

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Sally is 54 years old and her mother is 80, how many years ago was Sally’s mother times her age?

yanalaym [24]

Answer:

<u>41 years ago</u>

Step-by-step explanation:

Let the no. of years ago be x.

Then, the equation we need would be :

=> 80 - x = 3(54 - x)

=> 80 - x = 162 - 3x

=> 2x = 82

=> x = 41

Sally's mother was 3 times her age <u>41 years ago</u>

Checking

=> Sally = 54 - 41 = 13

=> Mom = 80 - 41 = 39

=> 13 x 3 = 39 [∴Verified]

3 0

3 years ago

Read 2 more answers

Write a function that represents the situation. Find the balance A in the account after the given time period t. $6200 deposit t

MaRussiya [10]

Answer:

$A=P(1+r)^t$
$\$7029.46$

Step-by-step explanation:

As this is the case of exponential growth, we can use the function

$A=P(1+r)^t$

Here A is function of t, where A gives the balance after time t.

P = initial deposit,

r = rate of change or rate of interest,

$6200 deposit that earns 8.4% annual interest compounded monthly for 18 months.

So,

P = $6200,

r = 8.4% annual = $\dfrac{8.4}{12}\%$ monthly = $\dfrac{0.084}{12}$ monthly (as interest compounded monthly)

t = 18 months,

Putting all the values,

$A=6200(1+\frac{0.084}{12})^{18}$

$=6200(1+0.007)^{18}$

$=6200(1.007)^{18}$

$=\$7029.46$

8 0

4 years ago

Read 2 more answers

A recipe calls for 3 1/2 cups of sugar. If you want to make only 1/3 of the recipe, how much sugar should you use?

Sav [38]

Answer: 1 1/6 cups of sugar

Step-by-step explanation:

First let’s convert 3 1/2 into an improper fraction: 7/2

Then we multiply 7/2 by 1/3: 7/2*1/3=7/6

Then finally we convert 7/6 into a mixed number, so your answer will be 1 1/6

3 0

3 years ago

This graph relates the area of a face of a cube to the surface area of that cube.

erma4kov [3.2K]

Answer:3,18

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Rewrite -4<x<-1 using absolute value sign

german

$- | 4 | < x < - |1|$

dunno if that's the desired form tough, but it states the same definition

3 0

3 years ago