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GaryK [48]
11 months ago
7

suppose a consumer advocacy group would like to conduct a survey to find the proportion p of consumers who bought the newest gen

eration of an mp3 player were happy with their purchase. a. how large a sample n should they take to estimate p with 2% margin of error, proportion 0.5 and 90% confidence?
Mathematics
1 answer:
Zepler [3.9K]11 months ago
4 0

The size of the sample they should take to estimate p with a 2% margin of error and 90% confidence is n = 1691.

In statistics, the margin of error is just the degree of a significant error in the outcomes of random sample surveys.

The formula of margin error is, E = z√((p-vector)(1 - (p-vector)) ÷ n)

E = 2% = 0.02

Confidence level = 90%

Now, the proportion is not given so adopt nominal (p-vector) = 0.05

The critical value at CL of 90% is 1.645.

Thus, making n the subject,

n = z²(((p-vector) × (1 - (p-vector))) ÷ E²)

n = 1.645²((0.5 × 0.5) ÷ 0.02²)

n = 1691.266

n ≈ 1691

Read more about the margin of error at

brainly.com/question/16141482?referrer=searchResults

#SPJ4

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Find an equation for the line perpendicular to y = − 1 /9 x + 4 with x-intercept at x = -1
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How many 'words' can be made from the name ESTABROK with no restrictions
Bumek [7]

The number of ways in which the name 'ESTABROK' can be made with no restrictions is 40, 320 ways.

<h3>How to determine the number of ways</h3>

Given the word:

ESTABROK

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The formula for permutation without restrictions

P = n! ( n - p + 1)!

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P = 8! (1)!

P = 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 × 1

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Thus, the number of ways in which the name 'ESTABROK' can be made with no restrictions is 40, 320 ways.

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