The question deals with a simple random sampling method for a statistics class, discussing various techniques such as proportionate random sampling, systematic sampling, and the importance of each individual having an equal chance of being selected to ensure a representative sample.
Explanation:The student's question involves selecting a simple random sample of 30 students from a population of 250 students in a large statistics class, using the sampling frame of students present next Monday. The concept described relates to sampling methods within the field of statistics, used to infer characteristics of a larger population. One method mentioned is proportionate random sampling, where a sample is obtained from each class based on the proportion of students in the college (e.g., if 30% of students are freshmen, then 30% of the sample would come from the freshman class). Another method is systematic sampling, where a starting point is chosen using a random number generator and then every nth student is selected (e.g., every 50th student). An important characteristic of a good sample is that every individual in the population should have an equal chance of being included, which is a hallmark of both random and systematic sampling methods. Finally, stratification, such as by class standing or other demographic factors, ensures that the sample is representative of the population under study, which might involve working with local schools to select a random sample of students from various backgrounds.
Please explain how you got the answer <3
Last week, 3,472 grams of silver was bought by Big Bob's Pawnshop. During the same week they bought 2000 fewer grams of gold than silver. How many grams of gold and silver combined did Bob by last week, rounded to the nearest 10?
A) 1,470
B) 1,480
C) 4,940
D) 4,950
5(x+3)−2x Which expression correctly combines the like terms? 3x+15 3x+3 3x2+15 3x2+3
The Holiday Rush gets really intense. You work from 7am to 11pm on the Friday and Saturday just before Xmas, selling clothes and then stocking shelves, and then from 9am to 9pm on Sunday. Your pay rate is $20 per hour. How much do you get in gross wages for that one weekend
The total hours worked over the weekend are 44 hours, resulting in gross wages of $880.
To calculate the gross wages for the weekend, we need to multiply the hours worked each day by the hourly pay rate of $20. On Friday and Saturday, the working hours are from 7am to 11pm, which is 16 hours each day. On Sunday, the working hours are from 9am to 9pm, which is 12 hours.
To find the total hours worked over the weekend, we add the hours for each day:
Friday: 16 hoursSaturday: 16 hoursSunday: 12 hoursNow we calculate the total hours: 16 + 16 + 12 = 44 hours.
Next, we calculate the total earnings by multiplying the total hours by the hourly rate:
= 44 hours x $20 per hour = $880.
Therefore, the gross wages for the weekend work are $880.
What is the greatest common factor of 64 and 18
576
4
2
64
4,843 rounded to nearest hundred
Simplify 15.6 divided by negative 3..
Solve x2+4x+1=0. Please someone help me asap
The solution to the quadratic equation is x = 2 ± √3
What is Quadratic Equation?A quadratic equation is a second-order polynomial equation in a single variable x , ax² + bx + c=0. with a ≠ 0. Because it is a second-order polynomial equation, the fundamental theorem of algebra guarantees that it has at least one solution. The solution may be real or complex.
The roots of the quadratic equations are
x = [ -b ± √ ( b² - 4ac ) ] / ( 2a )
where ( b² - 4ac ) is the discriminant
when ( b² - 4ac ) is positive, we get two real solutions
when discriminant is zero we get just one real solution (both answers are the same)
when discriminant is negative we get a pair of complex solutions
Given data ,
Let the quadratic equation be represented as A
Now , the value of A is
x² + 4x + 1 = 0 be equation (1)
And , roots of the quadratic equations are
x = [ -b ± √ ( b² - 4ac ) ] / ( 2a )
On simplifying , we get
x = [ -4 ± √ ( 4 )² - ( 4 ) ( 1 ) ( 1 ) ] / 2
x = [ -4 ± √ ( 16 - 4 ) ] / 2
x = [ -4 ± √12 ] /2
On further simplification , we get
x = [ -4 ± 2√3 ] /2
x = 2 ± √3
Therefore , the value of x is 2 + √3 or 2 - √3
Hence , the roots of the quadratic equations is x = 2 ± √3
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how can you determine if a factor will increase or decrease when multiplied by a fraction?
The value of the fraction varies in nature that's why the value of the product got decreased and increase.
Fraction is defined as the number of compositions that constitute the Whole.
here,
Case 1, when the value of the fraction is greater than 1, the value will increase when multiplied with a certain value.
Case 2 , when the value of the fraction is less than 1, the value will decrease when multiplied by a certain value.
Thus, the value of the fraction varies in nature that's why the value of the product got decreased and increase.
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Write the repeating decimal 0.1515... as a fraction
pls explain
533
Explanation:We first let 0.¯¯¯¯15 (15 being repeated) be x.
Since x has 2 decimal places recurring, we multiply it by 100.
x=0.151515....
100x=15.151515...
Next, we subtract them.
100x−x=15.151515−0.15151599x=15Lastly, we divide both sides by 99 to get x as a fraction.
x=1599=5332x=3 multiply each side by?
a 20 ft piece of string is cut into two pieces so that the longer piece is 5 feet longer than twice the shorter piece. If the shorter piece is x feet long, find the lengths of both pieces
Answer:
The shorter piece is 5 ft long.
The longer piece is 15 ft long.
Step-by-step explanation:
Let's write this into an equation:
(5+2x)+x=20
5+3x=20
Subtract 5 from both sides
3x=15
x=5
The shorter piece is 5 ft long.
The longer piece is 5 feet longer than 2 times 5 ft (the shorter piece).
5+2*5
5+10
15
The longer piece is 15 feet long.
Hope this helped!
Help me in distress!!!!!
To which subset of the real numbers does √2 belong
The values of the expressions 2m-13 and m+3 are equal?
As per linear equation, the value of 'm' is 16.
What is a linear equation?"A linear equation is an equation in which the highest power of the variable is always 1. It is also known as a one-degree equation."
Given linear equation is
[tex]2m - 13 = m+3[/tex]
⇒ [tex]2m - m = 3+13[/tex]
⇒ [tex]m = 16[/tex]
Therefore, the required solution is [tex]m = 16[/tex].
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HOW DO YOU WRITE 6000 AS A WHOLE NUMBER MULTIPLIED BY THE POWER OF
TEN
Find the value of 3.4 squared
The value of the exponent numerical expression (3.4)² will be 11.56.
What is the value of the expression?When the relevant components and basic processes of a numerical method are given values, the expression's result is the result of the computation it depicts.
The definition of simplicity is making something simpler to achieve or grasp while also making it a little less difficult.
The expression is given below.
⇒ (3.4)²
Simplify the expression, then we have
⇒ (3.4)²
⇒ 3.4 x 3.4
⇒ 11.56
The value of the exponent numerical expression (3.4)² will be 11.56.
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what is 8.75 gallons divided by 2/5
Multiply.Write each product in simplest form
1. 1/2 x 5/8
2. 3/5 x 5/9
3. 3/8 x 2/5
4. 2 3/8 x 16
5. 1 4/5 x 5/12
6. 1 2/10 x 5
Answer & Step-by-step explanation:
To multiply two fractions you have to multiply the numerators and the denominators.
1/2 × 5/8 = 5/16
3/5 × 5/9 = 15/45 = 1/3
3/8 × 2/5 = 6/40 = 3/20
to make mixed numbers improper fractions, you have to multiply the denominator by the whole number and then add the numerator to it. So the new number becomes the numerator while the denominator stays as the denominator.
2 3/8 × 16= 19/8 *16/1 = 38
If the numerator of the one fraction is the same as the denominator as the other fraction, they cancel out.
1 4/5 × 5/12 = 9/5 × 5/12 = 9/12
1 2/10 × 5 = 12/10 × 5/1 = 60/10 = 6
Hope this helps!!!
find the quotient of 7.55/0.23. round to the nearest tenth
What is a fraction less than 56 that has a denominator of eight
Can you unscramble these words
How to slove step by step
Which rational number equals 0 point 5 with bar over 5? 1 over 50 1 over 5 5 over 10 5 over 9
Answer is b or the second option
Step-by-step explanation:
Answer:
1/5
Step-by-step explanation:
Mr Henderson has 2 bouncy ball vending machines , he buys one bag of the 27 millimeter balls and one bag of the 40 millimeter balls . he puts an equal number of each in the 2 machines how many bouncy balls does he put in each machine ? please answer and explain how u find the answer
Answer:
The answer is 33 bouncy balls in each machine
Step-by-step explanation:
In order to determine the answer, we need to divide every bouncy ball bags by two. The information about the amount of balls in every bag is:
bag 27 mm= 180 balls
bag 40 mm= 80 balls
The bag of 27 mm has an even amount of balls, so if we divide it by two, there will be 90 balls in each machine.
The bag of 40 mm has an even amount of balls, so if we divide it by two, there will be 40 balls in each machine.
Finally, considering the division in every bag, each machine has 130 balls.
X(2•x)= 4•5•y
You get 77 points in you can help me with this!
Answer:
[tex]\boxed{\mathrm{view \: explanation}}[/tex]
Step-by-step explanation:
x(2•x)= 4•5•y
Expand brackets,
2x•x²=20•y
Multiply.
2x³ = 20y
Divide both sides by 2.
x³ = 10y
Take cube root.
x = ∛10y
2x³ = 20y
Divide 20 on both sides.
1/10x³ = y
Answer:
[tex] y = \frac{ {x}^{3} }{10} [/tex]
Step-by-step explanation:
[tex]x(2 \times x) = 4 \times 5 \times y \\ 2x \times {x}^{2} = 20y \\ 2 {x}^{3} = 20y \\ \frac{ 2{x}^{3} }{20} = \frac{20y}{20} \\ y = \frac{ {x}^{3} }{10} [/tex]
(a)round 44.2862 to 3dp
(b)round 4.0854 to 2dp
(c)round 0.0196 to 3dp
(d)round 0.7048 to 2dp
6-x-x=18 I'm not sure how to solve this problem I keep getting -9 but I'm not sure
A cooler at a picnic contains 12-ounce cans and 16-ounce bottles of both lemonade and apple juice.
Drinks
Type Number
12-ounce lemonade 4
12-ounce apple juice 5
16-ounce lemonade 3
16-ounce apple juice 6
Adam was very thirsty, so he randomly grabbed a 16-ounce bottle from the cooler. What is the probability that his randomly selected bottle will be apple juice?
The answer is 2/3. IT IS NOT 2/4 OR 50%.
which of the following coordinate pairs represents the y-intercept of the line described in the table above?
A. (0,0)
B. (4,0)
C. (0,8)
D. (0,4)
How do I do this answer in a destructive property? -3 (n-4)