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3 years ago

Basic Stats for psychology

Mathematics

1 answer:

babymother [125]3 years ago

6 0

Answer:

Ratio

Step-by-step explanation:

First lets understand various scales of measurement in psychology

Nominal: Separate numbers indicate separate objects. these no actual meaning other than separating between objects.

example: number on vests of football players

2.Ordinal: meaning order

example: place finished in a race 1st , 2nd

3. Interval: have no order

equal interval between the adjacent categories

the difference between two similar physical quantity is same

4. Ratio: Differences are meaningful like interval

ratios are meaningful , Existence of "true zero point"

Now in the above case money is spend to buy candies which is meaningful and if no money is spent no candies are purchased hence existence of "True zero point"

Hence Ratio scale would be most appropriate to measure this case

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Answer:

Step-by-step explanation:

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2 years ago

Sam put a 12-inch ruler into a cup. If 3 inches of the ruler were sticking out of the top of the cup, how deep was the cup?

Goryan [66]

Answer:

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Step-by-step explanation:

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3 years ago

In the figure below AB is a diameter of circle P. What is the arc measure of minor arc AC in degrees?

arlik [135]

Answer:

$P = 139$

Step-by-step explanation:

See attachment for complete question

Required

Determine measure of Arc length AC

The interpretation of this question is to find P

If AB is the diameter, then

$P + 41 = 180$

$P + 41 - 41= 180 - 41$

$P = 139$

<em>Hence, the measure is 139 degrees</em>

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3 years ago

10x + 4x 3 – 4 Write the polynomial in standard form. Then name the polynomial based on its degree and number of terms.

weqwewe [10]

Guessing that the 3 was suppose to be an exponent.

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4x^3 + 10x - 4

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7 0

3 years ago

The source of the error when a computer system fails are either the disk drive, the computer memory, or the operating system. Ve

faltersainse [42]

Answer:

The probability of an operating system error given that a failure has ocurred is P(O/E)= 0.19

Step-by-step explanation:

Hello!

There are three different sources of error when a computer system fails:

D: disk drive error. ⇒ P(D)= 0.50

M: computer memory error. ⇒P(M)= 0.20

O: operating systems error. ⇒ P(O)= 0.30

According to the component perdormance standard:

The probability of failure "E", given that there is a disk drive error is P(E/D)= 0.40

The probability of failure "E", given that there is a computer memory error is P(E/M)= 0.6

The probability of failure "E", given that there is a operating system error is P(E/O)= 0.25

You need to calculate the probability of an operating system error given that a failure has ocurred, symbolically:

P(O/E)

$P(O/E)= \frac{P(OnE)}{P(E)}$

To reach the probability of the marginal E you have to add all intersections between the event "E" and the events "D", "M" and "O"

D M O Total

E: P(E∩D); P(E∩M); P(E∩O); P(E)

Using the formula of the conditional probability I'll clear all three intersections using the known probabilities:

General formula: $P(A/B)= \frac{P(AnB)}{P(B)}$ ⇒ $P(AnB)= P(A/B)*P(B)$

P(E∩D)= P(E/D)*P(D)= 0.4*0.5= 0.2

P(E∩M)= P(E/M)*P(M)= 0.6*0.2= 0.12

P(E∩O)= P(E/O)*P(O)= 0.25*0.3= 0.075

P(E)= P(E∩D) + P(E∩M) + P(E∩O)= 0.2+0.12+0.075= 0.395

$P(O/E)= \frac{P(OnE)}{P(E)} = \frac{0.075}{0.395}= 0.189 = 0.19$

I hope it helps!

7 0

3 years ago