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3 years ago

I need help plz will give brainliest!!!

Mathematics

1 answer:

Leokris [45]3 years ago

7 0

Answer:

18 red marbles

Step-by-step explanation:

Because the ratio of yellow marbles to red marbles is 1:6 in the population, the expected number of red marbles is 6 times the number of yellow marbles in the representative sample. there should be 18 red marbles.

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A realtor collects the data set given in DS 12.2.4 concerning the sizes of a random selection of newly constructed houses in a c

Yuliya22 [10]

The table is missing in the question. The table is attached below.

Solution :

Let X = appraised value

Y = area (square feet)

The regression line is given by :

$\hat y = b_0+b_1X$

$b_1=\frac{n\sum XY-\sum X \sum Y}{n \sum X^2-(\sum X)^2}$

$=\frac{15(5964990)-(2157)(33370)}{15(404799)-(2157)^2}$

$=12.3267$

$b_0=\frac{\sum Y}{n}-b_1\frac{\sum X}{n}$

$=\frac{33370}{15}-\left(12.3267 \times \frac{2157}{15}\right)$

$b_0=452.0841$

The regression line is :

$\hat Y = 452.0841+12.3267 X$

To estimate the error variance, we have:

Error variance, $\sigma =\sqrt{\frac{\sum (Y-\hat Y)^2}n-2{}}$

$=\sqrt{\frac{587682.3}{15-2}}$

$=212.6178$

8 0

3 years ago

Help answer brainliesttttttttt

nydimaria [60]

2:15

Amount of problems:How much time.

2·5:15·5

=10:75

So 10 problems in 75 minuets.

HOPE THIS HELPED A LOT!!!!!

Can I have brainiest now???

8 0

3 years ago

ITS AN EDUCATIONAL EMERGENCY!!! This is due tonight how do I solve this?? PLEASE HELPP

kvasek [131]

Answer:

Mabel used 12 dimes and 7 quarters to pay for her granola bar.

Step-by-step explanation:

A dime= 10 A quarter= 25

12×10=120

7×25=175

175+120=295

12-7=5

4 0

3 years ago

What is the prime factorization of 96? 0 25.32 25.3 02.2.2.2.3 8.12

Nina [5.8K]

Answer:

8.12

Step-by-step explanation:

we first multiply 8 by 12 and we will get 96 as our answer

7 0

3 years ago

Find the amount of time. I=$237. 90, P=$1525, r=2. 6% Find the amount of time. __ Years

Virty [35]

$~~~~~~ \textit{Simple Interest Earned} \\\\ I = Prt\qquad \begin{cases} I=\textit{interest earned}\dotfill & \$237.90\\ P=\textit{original amount deposited}\dotfill & \$1525\\ r=rate\to 2.6\%\to \frac{2.6}{100}\dotfill &0.026\\ t=years \end{cases} \\\\\\ 237.90 = (1525)(0.026)(t)\implies \cfrac{237.90}{(1525)(0.026)}=t \implies 6=t$

3 0

2 years ago