Ask question

Ask question

All categories

Paladinen [302]

1 year ago

11

A student conducting a research study was told by her professor to use a scatterplot in conjunction with calculating the correla

tion coefficient. She discovered that the data points clustered along a straight line. This means:

1 answer:

zloy xaker [14]1 year ago

8 0

Answer:

a linear relationship exists between variables

Step-by-step explanation:

You might be interested in

12 apple weigh 2 kg 500g . How many apples will weigh 15 kg

Jobisdone [24]

72 apples will weigh 15 kg

Brainliest?

6 0

1 year ago

Read 2 more answers

The mean percent of childhood asthma prevalence in 43 cities is 2.32%. A random sample of 32 of these cities is selected. What

lidiya [134]

Answer:

$P(\bar X>2.8)$

We can use the z score formula given by:

$z=\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And replacing we got:

$z=\frac{2.8 -2.32}{\frac{1.24}{\sqrt{32}}}=2.190$

And using the normal standard distribution and the complement rule we got:

$P(z>2.190 )= 1-P(z$

Step-by-step explanation:

For this case w eknow the following parameters:

$\mu = 2.32$ represent the mean

$\sigma =1.24$ represent the deviation

n= 32 represent the sample sze selected

We want to find the following probability:

$P(\bar X>2.8)$

We can use the z score formula given by:

$z=\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And replacing we got:

$z=\frac{2.8 -2.32}{\frac{1.24}{\sqrt{32}}}=2.190$

And using the normal standard distribution and the complement rule we got:

$P(z>2.190 )= 1-P(z$

8 0

1 year ago

Read 2 more answers

Mr Chua borrows a sum of money from the bank which charges a compound interest of 4.2% per annum, compounded 6.Given that Mr Chu

Inessa [10]

Answer:

Original sum of money = $2246.51

Step-by-step explanation:

Interest = $96.60

Interest is compounded 6 times in a year ; n = 6

time = 1 year ; Rate of interest (r) = 4.2%

Interest = Future Value - Principal Value ...........(1)

$\text{Future Value = }Principal\cdot (1+\frac{r}{100\times n})^{n\cdot t}\\\\\text{Substituting this value in equation (1) , We get }\\\\Interest=Principal\cdot (1+\frac{r}{100\times n})^{n\cdot t}-Principal\\\\\implies 96.60=Principal[\cdot (1+\frac{4.2}{100\times 6})^{6\cdot 1}-1]\\\\\implies Principal=\$2246.51$

Hence, the original sum of money borrowed = $2246.51

4 0

1 year ago

Kyle challenges you to a game. Each player rolls a standard number cube twice. If the sum of the results is divisible by 3, you

sweet [91]

Answer:

The probability of you winning is 1/3

No, it is not a fair game

Step-by-step explanation:

The first thing we need to have here is the sample space. This refers to the set of all possible results that can occur from the rolling.

Please check attachment for this

Kindly note that the total number of possible outcomes is 36.

And in the attachment, sums which are divisible by 3 are circled.

The number of circles we can count is 12

Thus, the probability of you winning would be number of circles/total number of outcomes = 12/36 = 1/3

Is it a fair game?

No, it is not

It can only be a fair game if the probability of winning equals probability of losing ( which is 18/36 = 1/2 or 0.5)

8 0

1 year ago

$5000 was invested into an investment that pays 4.25% simple interest. The total value of the investment amounted to $6593.75. H

Basile [38]

Answer:

7.5 years

Step-by-step explanation:

P = $5000,

R = 4.25%,

A = $6593.75,

N =?

SI = A - P = 6593.75 - 5000 =$1593. 75

$\because \: SI = \frac{ PNR}{100} \\ \\ \therefore \: 1593.75 = \frac{5000 \times N \times 4.25}{100} \\ \\ \therefore \: 1593.75 \times 100 = 21,250 \times N \\ \\ N = \frac{159375}{21250} \\ \\ N = 7.5 \: years \:$

6 0

1 year ago