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slavikrds [6]
2 years ago
13

The human resource department at a certain company wants to conduct a survey regarding worker benefits. The department has an al

phabetical list of all 4247 employees at the company and wants to conduct a systematic sample of size 40 (a) What is k? k- 106 (b) Determine the individuals who will be administered the survey. Randomly select a number from 1 to k. Suppose that we randomly select 19. Starting with the first individual selected, the individuals in the survey will be 19. 125 231
Mathematics
1 answer:
dezoksy [38]2 years ago
3 0

Answer:

Step-by-step explanation:

Hello!

A systematic sample is a sampling type where, the population units are listed in a certain order, the first unit is randomly chosen from the first k number of units and then the subsequent units are selected in intervals of k. To calculate k, in case you know the population size, you have to divide the population size by the sample size (usually established based on previous information. Remember k is always a whole number.

a) k= pob/n= 4247/40= 106.175 ≅ 106

b) From the 106 individuals you have to randomly select the first unit. Then starting from it the next 39 individuals surveyed will be the +k

Using a random number calculator I've chosen the first individual to be surveyed as number 57 after that you have to add k= 106 to know wich are the next individuals to be sampled:

1) 57                          11) 1117        21) 2177       31) 3237

2) 57 + 106= 163      12) 1223      22) 2283    32) 3343

3) 269                      13) 1329      23) 2389     33) 3449

4) 375                       14) 1435      24) 2495     34) 3555

5) 481                        15) 1541       25) 2601     35) 3661

6) 587                       16) 1647      26) 2707     36) 3767

7) 693                       17) 1753       27) 2813      37) 3873

8) 799                       18) 1859       28) 2919     38) 3979

9) 905                       19) 1965       29) 3025    39) 4085

10) 1011                      20) 2071       30) 3131      40) 4191

I hope it helps!

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2 years ago
What are the solution(s) to the quadratic equation 9x2 = 4?
Kaylis [27]

Answer:

Option B.

Step-by-step explanation:

The given quadratic equation is

9x^2=4

We need to find the solution of given quadratic equation.

Divide both sides by 9.

\frac{9x^2}{9}=\frac{4}{9}

x^2=\frac{4}{9}

Taking square root on both sides.

x=\pm\sqrt{\frac{4}{9}}

x=\pm\frac{2}{3}

The solution of given equation are x=\frac{2}{3} and x=-\frac{2}{3}.

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6 0
2 years ago
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Correctly complete this sequence: 131, 517, ?, 123
antoniya [11.8K]

Answer:

192 is the missing number in the sequence.

Step-by-step explanation:

Given sequence is 131, 517, ?, 123.

First write the numbers without comma as 131517?123.

Break it in two digit numbers as 13, 15, 17, _ _ 23

Complete the sequence with the missing two digit odd numbers.

13, 15, 17, 19, 21, 23

Now rewrite the sequence without comma again.

131517192123

Place the comma after every three digits.

131, 517, 192, 123

Therefore, the missing number is 192.

5 0
2 years ago
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After losing all your money at the roulette wheel. You want to prove that the wheel is rigged. On a standard roulette wheel, red
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Answer:

The answer is yes.

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It is stated that the standard rate of getting a red number is 0.47, which is 47%. Out of 400, to get a 47% rate, we would need to have red 188 times which is less than 196 so the test results in a rate above 47% in which case the null hypothesis is correct and we can say that the wheel is rigged.

I hope this answer helps.

5 0
2 years ago
Two of the steps in the derivation of the quadratic formula are shown below. Step 6: StartFraction b squared minus 4 a c Over 4
sergeinik [125]

Answer:

Step-by-step explanation:

From the step given step 6

(b² — 4ac) / 4a² = (x + b/2a)²

Mistake in question it is (x + b/2a)²

Step 7 given

±√(b² —4ac) /2a = x + b/2a

Mistake in question it is over 2a and not 1a.

1. The step taken from step 6 to step 7 is taking square roots of both sides

(b² — 4ac) / 4a² = (x + b/2a)²

Taking square of both sodes

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√(b²—4ac) / 2a = x + b/2a

This is the required step 7.

Now, subtracting b/2a from both sides

√(b²—4ac) / 2a - b/2a= x + b/2a -b/2a

√(b²—4ac) / 2a — b/2a = x

(√(b²—4ac)  — b)/2a = x

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So, this is the required formula method

The discriminant is D = b²—4ac.

6 0
2 years ago
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