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shadowsnake
03.12.2020 •
Mathematics
Help me please asap!
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Ответ:
its the 2nd one
Step-by-step explanation:
Ответ:
There no need to restart the machine .
Step-by-step explanation:
Given: Mean at start =123 ounces
after the 35 cans selected means become 122.9 ounces .
and standard deviation of 0.30.
To find : Is there need to restart machine ?
Solution:
Standard error for mean is given by
Sm=Standard deviation /sqrt of number of samples(n)
=0.30/
=0.0507
Sm=0.0507
Now
for there is change in mean after 35 cans are selection hence there should be change in "t score "
which means t score =converting the individual of 35 cans to standard form.
it given by, with 5.07 % of the standard form
Change in mean /Sm= (122.9-123)/0.0507=1.9723
Then for the value of the p =function of t score and the degree of freedom.
=0.056
i.e. p>0.01 which means there no need to restart the machine .