Which label on the cone below represents the radius?

Mathematics

2 answers:

marishachu [46]2 years ago

7 0

Answer:

the radius found on the letter c

Readme [11.4K]2 years ago

6 0

Answer:

the radius found on the letter c

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Which of the following is an example of a matched pairs design? A. A teacher calculates the average scores of students on a pair

Mashutka [201]

Answer:

B. A teacher compares the pre-test and post-test scores of students

Step-by-step explanation:

the answer is true, because it is a good example to compare the tests between students, we know that a matching pair design is a random model and is used when the experiment allows grouping subjects in pairs based on a variable and each pair will receive randomly a different handling, the answer A is not true because in the example all students are uniformly averaged and the variable is not correlated with subgroups, option c is incorrect because the variable was not randomized and generates classification bias and the option d is incorrect because the teacher compares a small sample as her class with a score of a total sample, but does not intervene on her students when selecting the corresponding group

5 0

2 years ago

The equation for the circle below is x ^2 + y^2 = 100. what is the length of the circles radius?

Ganezh [65]

Answer: 10 units.

Step-by-step explanation:

The equation of the circle in Center-radius form is:

$(x - h)^2 + (y - k)^2 = r^2$

Where the center is (h,k) and "r" is the radius.

The equation of the circle given is:

$x ^2 + y^2 = 100$

You can observe that is written in Center-radius form.

Then, you can identify that:

$r^2=100$

Knowing this, you need to solve for "r" to find the lenght of the radius.

This is:

$r=\sqrt{100}\\\\r=10$

Therefore, the lenght of the radius is 10 units.

8 0

2 years ago

For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 50

Volgvan

Answer:

$P(\bar X>530)=1-0.808=0.192$

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Let X the random variable that represent the scores, and for this case we know the distribution for X is given by:

$X \sim N(\mu=505,\sigma=170)$