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lutik1710 [3]
3 years ago
9

For the 2015 Intel Science Fair, two brothers in high school recruited 47 of their classmates to take part in a two-stage study.

Participants had to read two different passages and then answer questions on them, and each person's score was recorded for each of the two tests. There were no distractions for one of the passages, but participants received text messages while they read the other passage. Participants scored significantly worse when distracted by incoming texts. Participants were also asked if they thought they were good at multitasking (yes or no) but "even students who were confident of their abilities did just as poorly on the test while texting."1(a) How many cases are there?Entry field with correct answer(b) How many variables are mentioned in the description?Entry field with correct answerHow many of these are categorical?Entry field with incorrect answer now contains modified dataHow many are quantitative?Entry field with incorrect answer now contains modified data(c) If we created a dataset of the information with cases as rows and variables as columns, how many rows and how many columns would the dataset have?How many rows?Entry field with incorrect answer now contains modified dataHow many columns?
Mathematics
2 answers:
kvv77 [185]3 years ago
8 0

Answer:

a) 47

b) 3

c)  1

d) 2

e) 47

f) 3

Step-by-step explanation:

read the textbook

lakkis [162]3 years ago
8 0

Answer:

a) 47

b) 3

c) 1

d) 2

e) 47

f) 3

Step-by-step explanation:

a) in the test, there are 47 participants. All took the test.

b) there are 3 variables in the test. There are text messages, distractions, and the messages answered.

c) 1 row and column will be the maximum number of rows and columns permissible

d) 2

e) 47

f) 3

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A groundskeeper needs grass seed to cover a circular field 290 feet in diameter
Vlada [557]

Answer:

165

Step-by-step explanation:

First we need to find the area of the field, A = r^2 * pi

The radius is 290 / 2 = 145 feet

A = 145 * 145 * 3.14 = <u>66018.5</u> sqr feet

One bag covers 400 sqr feet

Divide the Area by 400 sqr feet to find number of bags needed.

66018.5 / 400 = <u>165</u>

He will need at least 165 bags to cover the field

6 0
3 years ago
Read 2 more answers
Help me please. This is algebra 1
ollegr [7]

Answer: -133

Step-by-step explanation:

1.  4(-6^2+3)-2(1/2)

          v

2.  4(-36+3)-2(1/2)

            v

3.  4(-33)-2(1/2)

          v     v

4.  -132-1

          v

5.    -133

7 0
1 year ago
Please I need the answer only​
lawyer [7]

Answer:

w = 1.6

Step-by-step explanation:

Given w varies inversely as \sqrt{x} then the equation relating them is

w = \frac{k}{\sqrt{x} } ← k is the constant of variation

To find k use the condition when x = 4, w = 4

k = w\sqrt{x} = 4 × \sqrt{4} = 4 × 2 = 8

w = \frac{8}{\sqrt{x} } ← equation of variation

When x = 25, then

w = \frac{8}{\sqrt{25} } = \frac{8}{5} = 1.6

6 0
3 years ago
Will mark the Brainliest !!!!! A team of 5 boys and 4 girls will be chosen from a group of 16 boys and 13 girls,
vfiekz [6]

Answer:

Step-by-step explanation:

The total number of permutations of boys and girls on the team are:

¹⁶P₅*¹³P₄

1.

Bob will be one of the fixed boys to be picked. Hence, actually 4 boys are to be picked from 15. The permutations of girls being picked remains the same.

Probability = Permutations with Bob as one of the boys / Total permutations

Probability = (¹⁵P₄*¹³P₄) / (¹⁶P₅*¹³P₄) = ¹⁵P₄ / ¹⁶P₅

Probability = \frac{15!}{(15-4)!}/\frac{16!}{(16-5)!} = 15! / 16! = 1/16

2.

Now, Bob is one of the fixed boys and Jane is one of the fixed girls. Hence, actually 4 boys are to be picked from 15 and 3 girls are to be picked from 12.

Probability = Permutations with bob as one of the boys and jane as one of the girls / Total permutations

Probability = (¹⁵P₄*¹²P₃) / (¹⁶P₅*¹³P₄) = (1/16)*(1/13) = 1/208

3.

Now, the probability that at least Jane or Bob will be picked has been asked. This probability is a combination of three probabilities:

Probability = (Probability that only Bob will be picked) + (Probability that only Jane will be picked) + (Probability that both will be picked)

Probability = 1/16 + 1/13 + 1/208 = 0.123

4.

Total teams possible = ¹⁶P₅*¹³P₄ = 8994585600 teams are possible

5 0
3 years ago
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puteri [66]
|-9|-|6-11|=\\&#10;9-|-5|=\\&#10;9-5=\\&#10;4
8 0
3 years ago
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