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1 page/β275 words
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Style:
APA
Subject:
Mathematics & Economics
Type:
Statistics Project
Language:
English (U.S.)
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Total cost:
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Topic:
Confidence Intervals
Statistics Project Instructions:
In this week’s reading, we discussed different types of samples, their distributions, sampling errors, probabilities, and confidence intervals. Using the appropriate support tool, sequence, and equations, complete Problem 33 in Chapter 8 on page 351.
Problem 8-33. You have been assigned to determine whether more people prefer Coke or Pepsi. Assume that roughly half the population prefers Coke and half prefers Pepsi. How large a sample do you need to take to ensure that you can estimate, with 95% confidence, the proportion of people preferring Coke within 2% of the actual value? Show work.
Statistics Project Sample Content Preview:
Confidence Intervals
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Confidence Intervals
At 95% confidence level, the critical value of Z equals 1.960 (Bornmann, 2017). This value implies that at 95% confidence interval, the value will deviate by 1.96 from the mean.
Therefore;
Z = 1.960
B = 2%, ...
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