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(a)
To identify: the type of sample described.
(a)
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Answer to Problem 34E
Here, the state is divided into small groups (33 counties) and the sample of 50 voters is then randomly selected from each group. So, this sample is a stratified sample.
Explanation of Solution
Given:
Calculation:
In this case a poll is conducted to predict results of a statewide election. For that, 50 voters in each of the state’s 33 counties were surveyed.
Since, state is divided into small groups (33 counties) and the sample of 50 voters is then randomly selected from each group. Thus, this sample is a stratified sample.
Conclusion:
Hence, the state is divided into small groups (33 counties) and the sample of 50 voters is then randomly selected from each group. So, this sample is a stratified sample.
(b)
To explain:how the diagram results a biased sample..
(b)
![Check Mark](/static/check-mark.png)
Answer to Problem 34E
Each county has the same sampling fraction. In this way a sample will be selected that is more representative of the population.
Explanation of Solution
Calculation:
The results of this polling method could be biased.
From the diagram, it is clear that the number of voters in each country is different.
The size of the sample in each country should be taken in proportion to the population of the county. This will ensure that each county has the same sampling fraction. In this way a sample will be selected that is more representative of the population.
Conclusion:
Hence,each county has the same sampling fraction. In this way a sample will be selected that is more representative of the population.
Chapter 11 Solutions
Big Ideas Math A Bridge To Success Algebra 2: Student Edition 2015
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- (±³d-12) (−7+ d) = |||- \d+84arrow_forward(z- = (-2) (→ Use the FOIL Method to find (z — · -arrow_forwardMODELING REAL LIFE Your checking account has a constant balance of $500. Let the function $m$ represent the balance of your savings account after $t$ years. The table shows the total balance of the accounts over time. Year, $t$ Total balance 0 1 2 3 4 5 $2500 $2540 $2580.80 $2622.42 $2664.86 $2708.16 a. Write a function $B$ that represents the total balance after $t$ years. Round values to the nearest hundredth, if necessary. $B\left(t\right)=$ Question 2 b. Find $B\left(8\right)$ . About $ a Question 3 Interpret $B\left(8\right)$ . b represents the total balance checking and saving accounts after 8 years the balance would be 16 / 10000 Word Limit16 words written of 10000 allowed Question 4 c. Compare the savings account to the account, You deposit $9000 in a savings account that earns 3.6% annual interest compounded monthly. A = 11998.70 SINCE 9000 is the principal ( 1+0.036/12)12 times 8 gives me aproxtimately 1997 14 / 10000 Word Limit14 words written of 10000 allowed Skip to…arrow_forward
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