SOLUTION: Hi, can you help me solve this question?
I am doing it with the calculator these are the steps that I am doing
STAT, TInterval, Input: Stats, X: 31, Sx:15, n:14, C-Level:.95
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-> SOLUTION: Hi, can you help me solve this question?
I am doing it with the calculator these are the steps that I am doing
STAT, TInterval, Input: Stats, X: 31, Sx:15, n:14, C-Level:.95
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Question 1155460: Hi, can you help me solve this question?
I am doing it with the calculator these are the steps that I am doing
STAT, TInterval, Input: Stats, X: 31, Sx:15, n:14, C-Level:.95
This is what I got (22.339, 39.661)
but this is incorrect and I don't know what I am doing wrong.
In a survey, 14 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $31 and standard deviation of $15. Estimate how much a typical parent would spend on their child's birthday gift (use a 95% confidence level).
Give your answers to one decimal place. Provide the point estimate and margin or error.
You can put this solution on YOUR website! The numbers of the interval are correct both by calculator and by the formula doing by hand.
The point estimate is $31.0
The margin of error is +/-$8.66 or $8.7
The interval per se was not asked for and the results need to be one decimal place as odd as that is for dollars. Perhaps that may be the issue.
