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Tresset [83]
2 years ago
15

Li designed a survey to determine how comfortable students at her middle school are with fractions. There are 600 students in he

r middle school. The students are equally distributed among grade levels. She selected a sample of 28 students in her first-period class. Which best explains Li’s sample?
Mathematics
2 answers:
Dmitry_Shevchenko [17]2 years ago
4 0

The correct answer to this is:

Nonrandom and biased

 

<span>The method of Li’s sampling has a tendency that some elements or portion in the population has no chance of selection. Further, it was not stated which portion of the population she obtained the sample thus we cannot accurately determine the probability of selection. This kind of sampling results in a bias. A biased sampling is a type of nonrandom sampling. </span>

Oxana [17]2 years ago
4 0

Answer:

C for edge users

Step-by-step explanation:

You might be interested in
The curvature of the Tacoma Narrows Bridge in
8_murik_8 [283]

Answer:

Width of the arch = 105 m

Step-by-step explanation:

Function representing the width of the arch,

f(x) = -0.016(x - 52.5)² + 45

where x = width of the base of the arch or horizontal distance from arch's left end

f(x) = vertical distance of the arch

From the given quadratic function, vertex of the parabola is (52.5, 45).

Coordinates of the vertex represents,

Height of the arch = 45 m

Half of the horizontal distance from the left end = 52.5 m

Therefore, width of the bridge = 2(Half the width of the bridge from left end) = 2×52.5

= 105 m

Therefore, given bridge is 105 m wide.

4 0
2 years ago
A random number generator is used to create a list of 150 single-digit numbers. Of those 150 numbers, 72 are odd and 78 are even
Artemon [7]

Answer:

38%

Step-by-step explanation:

Option: 38%.

Total number of numbers: 150

Number of odd numbers: 72

Number of nines: 15

Number of odd numbers other than nine: 72 - 15 = 57

Probability = [number of odd numbers other than nine] / [total number of numbers] = 57/150 = 0.38

0.38 = 38%

4 0
2 years ago
A car uses 125 gallons of gasoline to travel 5034 miles. How far can the car travel on 1 gallon of gasoline? please answer :(
Olegator [25]
If it takes 125 gallons to go 5034 miles, then to find how far 1 gallon goes, we divide 5034/125=40.272 miles. Therefore your answer is 40.272miles a gallon
4 0
2 years ago
Read 2 more answers
Z=25/5 what is the next step in the equation solving sequence.
lbvjy [14]

Answer:

5

Step-by-step explanation:

Z = 25/5

in simplest form........

25/5 = 5/1

so the answer is 5.

3 0
2 years ago
Isabella Is building a tree fort .The base of the fort is 78 inches wide by 92 inches long. What is the area of the base in squa
Maslowich

Answer:

Part a) The area of the base is 7,176\ in^{2}

Part b) The area of the base is 49\frac{5}{6}\ ft^{2}

Step-by-step explanation:

we know that

The area of a rectangle is equal to

A=LW

Part a)

we have

L=92\ in

W=78\ in

substitute

A=92*78=7,176\ in^{2}

Part b)

we know that

1\ ft=12\ in

Convert inches to feet

92\ in=92/12\ ft

78\ in=78/12=6.5\ ft

substitute in the formula

A=(92/12)*6.5=(598/12)\ ft^{2}

Convert to mixed number

(598/12)\ ft^{2}=(588/12)+(10/12)=49+(5/6)=49\frac{5}{6}\ ft^{2}

8 0
2 years ago
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