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Neko [114]
3 years ago
15

The participants in a research study self-report their sleep quality levels by choosing the response option that best characteri

zes their average sleep quality per night from the following response options: 1 = extremely low sleep quality, 2 - very low sleep quality, 3 - low sleep quality, 4 = extremely high sleep quality. Which measurement scale is being used to classify sleep quality?
Mathematics
1 answer:
Bad White [126]3 years ago
6 0

Answer:

This is a Categorical variable and the measurement scale is ordinal scale.

Step-by-step explanation:

The measurement scale that is being used to classify sleep is the ordinal measurement. In this question, the variable that is called sleep quality is a categorical variable. categorical variables are variables that have the data representing groups. sleep quality has been given this categorical order extremely low very low low and extreme high.

The ordinal scale is a scale that denotes order it has all variables in a specific order.

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Does (5, 10)make the inequality y ≥ 10x+5 true
Salsk061 [2.6K]

Answer:

It is False.

Step-by-step explanation:

When you substitute the coordinates into the inequality equation :

y \geqslant 10x + 5

let \: x = 5,y = 10

10 \geqslant 10(5) + 5

10 \geqslant 55 \: (false)

Therefore, 10 isn't greater than 55.

5 0
3 years ago
Read 2 more answers
Mathew buys a single ticket for $8 out of a lottery of 1000 tickets where the prize for the one winning is to be $800. How much
miss Akunina [59]

Given:

The number of tickets = 1000

Mathew buys a single ticket for $8

Winning price = $800

To find:

The expected earning per ticket.

Solution:

It is given that the total number of tickets is 1000. So, the probability of winning is:

P(Winning)=\dfrac{1}{1000}

The probability of losing is:

P(losing)=\dfrac{999}{1000}

The expected earning per ticket is:

E(x)=800\times P(Winning)-8\times P(losing)

E(x)=800\times \dfrac{1}{1000}-8\times \dfrac{999}{1000}

E(x)=\dfrac{800}{1000}-\dfrac{7992}{1000}

E(x)=\dfrac{800-7992}{1000}

E(x)=\dfrac{-7192}{1000}

E(x)=-7.192

Therefore, the expected earning per ticket is -7.192. Here, negative sign means loss of $7.192.

5 0
3 years ago
Help me with this please! determine x and y are in a proportional relationship!!
Temka [501]

Answer:

YES

Step-by-step explanation:

As x increases by 3 each time, y also increases by a steady number each time, which is 6. This means that x and y are in a proportional relationship with a 1:2 ratio.

7 0
3 years ago
The geometric sequence an = 1/5an-1 with an initial value of a1 = 125 represents the sales of a specific
lesya692 [45]

Here we want to get the sum of the first 8 terms for the given geometric sequence, we will find that the solution is: 156.25

<h3>Sum of the first N terms in a geometric sequence.</h3>

We know that for a geometric sequence given by:

a_n = a_1*r^{n-1}

Where r is the common ratio, the sum of the first N terms is given by:

S_N = a_1*(r^N - 1)/(r - 1)

Here we know that:

a_n = (1/5)*a_{n-1}

So the common ratio is r = 1/5

And we also know that:

a_1 = 125

Then we can replace these two in the formula for the sum with N = 8 to get:

S_8 = 125*( (1/5)^8 - 1)/( 1/5 - 1) = 156.25

If you want to learn more about geometric sequences, you can read:

brainly.com/question/9300199

3 0
2 years ago
Find a, b and c such that the number a , 7,b,23,c are in A.P please solve it​
Aloiza [94]

Answer:

since a,7,b,23,c are in A.P.

first term t1=a

second term t2=7

common difference (d)=7-a

forth term t4=a+3d

23=a+3(7-a)

23=a+21-3a

23=21-2a

2a=21-23

a=-2/2=-1

common difference =7-a=7--1=8

third term =a+2d=-1+2×8=15

:.b=15

5th term =c

a+4d=c

c=-1+4×8=31

a=-1

b=15

c=31

8 0
3 years ago
Read 2 more answers
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