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3 years ago

Elect all the correct answers.

Mathematics

2 answers:

dezoksy [38]3 years ago

8 0

this study uses random sampling

this study uses a control group

this study uses a repeated measures design 

plato/edmentum

AleksandrR [38]3 years ago

5 0

Answer:

This study uses a control group. This study uses a repeated measures design.

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How far did johnny travel in all? how long did it take

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Answer: We can't answer you if you don't say the problem.

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4 years ago

Rewrite 3/4 and 5/3 with a denominator of 12

Ira Lisetskai [31]

Answer:The answer would be 3/12 and 5/12 Because 4×3 = 12

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3 years ago

Read 2 more answers

How do you find the square root of any number

alina1380 [7]

Answer:

Multiply it by itself one time.

Step-by-step explanation:

For example, if you are trying to find 3 squared, you would do 3*3.

If it's 3 cubed, you do 3*3*3

And so on and so forth

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3 years ago

The managers of 21 supermarkets counted the number of cars in their parking lots on the same day. The results are shown in the l

mixer [17]

The IQR is 42.5

Step-by-step explanation:

Interquartile range is the difference of third and first quartile.

First of all we have to find the median for that purpose the data has to be arranged in ascending order. The data is already in ascending order.

As the number of values are odd

n=21

The median will be: $(\frac{n+1}{2}) th\ term$

Putting n=21

$(\frac{21+1}{2})th\ term\\=(\frac{22}{2})th\ term\\= 11th\ term$

The 11th term is 133

So median = 133

Now the data is divided into two halves

One is: 98, 100, 101, 102, 108, 109, 111,118, 129, 132

2nd is: 135, 135, 145, 146, 146, 156, 170 176, 180, 180

Q1 will be the median of first half and Q3 will be the median of 2nd half.

As now the halves contain even number of values, the medians will be the average of middle two values

For First Half:

98, 100, 101, 102, 108, 109, 111,118, 129, 132

$Q_1 = \frac{108+109}{2}\\Q_1 = \frac{217}{2}\\Q_1 = 108.5$

For Second Half:

135, 135, 145, 146, 146, 156, 170 176, 180, 180

$Q_2 = \frac{146+156}{2}\\Q_2 = \frac{302}{2}\\Q_2 = 151$

Now

Interquartile Range:

$IQR = Q_3-Q_1\\= 151-108.5\\=42.5$

Hence,

The IQR is 42.5

Keywords: Median, IQR

Learn more about median at:

#LearnwithBrianly

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3 years ago

What sine function represents an amplitude of 1, a period of 2pi, a horizontal shift of our, and a vertical shift of -4

alexandr1967 [171]

ANSWER

$g(x) = \sin(x +4) - 4$

EXPLANATION

The basic sine function is

$f(x) = \sin(x)$

The transformed sine function has equation

$g(x) = a \sin(bx +c ) + d$

where a=1 is the amplitude

2π/b=2π is the period

c/b= 4 is the horizontal shift 4 units left.

d=-4 is a downward vertical shift of 4 units.

The required sine function is:

$g(x) = \sin(x +4) - 4$

4 0

4 years ago