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StClowers Group Title

An online site presented this question, “Would the recent norovirus outbreak deter you from taking a cruise?” Among the 34,696 people who responded, 66% answered “yes”. Use the sample data to construct a 95% confidence interval estimate for the proportion of the population of all people who would respond “yes” to that question. __ < p < __ (round to three decimal places as needed) Does the confidence interval provide a good estimate of the population proportions? (a) No, the sample is a voluntary sample and might not be representative of the population. (b) No, the responses are not independent. (c) Yes, the sample is large enough to provide a good estimate of the population proportion. (d) Yes, all the assumptions for a confidence interval are satisfied.

  • 9 months ago
  • 9 months ago

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  1. StClowers Group Title
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    Please help me enter this into the Ti84 calc THANKS!!

    • 9 months ago
  2. violy Group Title
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    We will use the 1-PrpZInt function. We will press the STAT, right arrow key twice. Then, we press ALPHA MATH.

    • 9 months ago
  3. violy Group Title
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    We will input the appropriate values for x, n and C-level. Then, we will Calculate.

    • 9 months ago
  4. violy Group Title
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    By the way, take note that p hat = x/n.

    • 9 months ago
  5. StClowers Group Title
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    ok, which values are which though...thats the confusing part.

    • 9 months ago
  6. StClowers Group Title
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    @violy

    • 9 months ago
  7. violy Group Title
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    For the p hat, we will take note of the sample proportion given for the people who said yes. can you identify that? For the n, it is the sample size or the number of people who responded.

    • 9 months ago
  8. StClowers Group Title
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    yes ok...one sec

    • 9 months ago
  9. StClowers Group Title
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    it gave me an error...

    • 9 months ago
  10. StClowers Group Title
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    do i put in the 34696 just like that?

    • 9 months ago
  11. StClowers Group Title
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    I put x = .66 and n = 34696 then .95 for the c-level and it gave me an error.. :(

    • 9 months ago
  12. StClowers Group Title
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    ok so i tried it again and entered just 66 as the x and it gave me (.00144, .00236)..isthat right @violy ?

    • 9 months ago
  13. violy Group Title
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    Kindly recheck the value of the x.

    • 9 months ago
  14. violy Group Title
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    The 0.66 is for the p hat. If we use the formula p hat =x/n what will we get for the x?

    • 9 months ago
  15. StClowers Group Title
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    .001?

    • 9 months ago
  16. violy Group Title
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    Oops

    • 9 months ago
  17. violy Group Title
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    0.66=x/34696. Solve for x.

    • 9 months ago
  18. StClowers Group Title
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    Im so clueless, I guess Im not understanding where to get x

    • 9 months ago
  19. violy Group Title
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    We have the 34696 being divided on right side, we will use the opposite operation of division, which is?

    • 9 months ago
  20. StClowers Group Title
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    multiply

    • 9 months ago
  21. violy Group Title
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    That is correct, so we multiply each side by 34696. Can you try it?

    • 9 months ago
  22. StClowers Group Title
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    the left side is 22899.36 and the right side is 1203812416

    • 9 months ago
  23. violy Group Title
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    We will round that.

    • 9 months ago
  24. StClowers Group Title
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    ok.....in the question it asks to round to three decimal places as needed...

    • 9 months ago
  25. StClowers Group Title
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    @violy

    • 9 months ago
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