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Sagot :
The constructed interval for the rating of the ice cream mango and cotton candy is (-1.4-2.6). The correct option is C.
What is t-interval?
When the sample size is small and the population standard deviation is unknown, the T interval is useful.
The Z-interval for calculating confidence intervals becomes less reliable when the sample size is very small (n=30).
And this is where the T-interval comes in.
Thus, the correct option is C, (-1.4-2.6).
Learn more about t-interval
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