The amount of time it takes an ice cube to melt varies inversely to the air temperature. At 30 degrees Celsius, the ice will mel
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Let the number of matinee tickets they bought be t, the number of drinks bought be d and the number of popcorn bags bought be p, then the amount the spend on the number of drinks and bags of popcorn they bought is given by 
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The coefficients in the expression are 5.5 and 6 while the constant is 13 and the variables are d and p.
The coefficients in the expression are 5.5 and 6 while the constant is 13 and the variables are d and p.
Considering the situation described, we have that:
- The appropriate null hypotheses is
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- The appropriate alternative hypotheses is
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At the null hypotheses, it is tested if the mean has not been reduced, that is, it still is of 5.2 hours, hence:
.
At the alternative hypothesis, it is tested if the mean has been reduced, that is, it is now of less than 5.2 hours, hence:
More can be learned about hypotheses tests at brainly.com/question/26454209