3 years ago

Do u know this question

Mathematics

2 answers:

Stells [14]3 years ago

5 0

Answer:

Step-by-step explanation:

aleksklad [387]3 years ago

4 0

Answer:

a rectangle

Step-by-step explanation:

because 2 sides are the same the other 2 arent it has four sides with straight angles

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London has a collection of 260 coins. How many coins represent 25% of her collection?

Sergeu [11.5K]

Answer:

65 coins

Step-by-step explanation:

Set this problem up with a porportion.

$\frac{?}{260} \frac{25}{100}$

After that, cross multiple and divide.

25 times 260. Then divide by 100. That is then your answer.

8 0

2 years ago

In a T-test, if your n=459, your DF is: A. 459 B. 460 C. 458 D. A&C

Stels [109]

Answer:

DF = 458

Step-by-step explanation:

In statistics, T-test have an extensive application. T-tests are used in hypothesis testing or inference about the population mean when the population standard deviation is not known. Nevertheless, they are used in making inference in paired samples or dependent samples t-test as well as independent samples.

The degrees of freedom, DF, is a characteristic of the student's t distribution which is used in T-tests. In a simple T-test;

DF = n - 1

where n is the sample size

Given n is 459, DF = 459 - 1 = 458

Therefore, DF = 458

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3 years ago

Card drawn out of deck of 52 cards find probability of drawing a five or six

aivan3 [116]

Answer:

4 /52

Step-by-step explanation: