Winston owns a coffe cart. He charges $1.50 for a cup of coffe , and it costs him $0.50 to make each cup of coffe plus $100 a da
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Answer:
The degrees of freedom are given by:
And the p value taking in count that we have a bilateral test we got:
Since the p value is higher than the significance level of 0.05 we have enough evidence to conclude that the true mean is not significantly different from 430 the required value
Step-by-step explanation:
Information given
represent the mean for the weight
represent the sample standard deviation
sample size
represent the value that we want to verify
represent the significance level
t would represent the statistic
represent the p value
System of hypothesis
We are trying to proof if the filling machine works correctly at the 430 gram setting, so then the system of hypothesis for this case are:
Null hypothesis:
Alternative hypothesis:
In order to cehck the hypothesis the statistic for a one sample mean test is given by
(1)
Replacing the info given we have this:
The degrees of freedom are given by:
And the p value taking in count that we have a bilateral test we got:
Since the p value is higher than the significance level of 0.05 we have enough evidence to conclude that the true mean is not significantly different from 430 the required value