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Vilka [71]
3 years ago
14

56 students signed up for the school play. About 34% of these students were boys. At the auditions only 31 girls attended. What

percent of girls who signed up for the play attended the auditions?
EXPLAIN HOW TO SOLVE
Mathematics
1 answer:
Elza [17]3 years ago
3 0

56 students represents 100 % and

X boys represent 34%,

so x= 56•34/100= 19.04 so approximately 19 boys

56-19= 37 girls signed up.

Now 37 girls represent 100% and 31 girls represent x % ,

So x= 31•100/37= 83.78% about 84% of the girls attended

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The upper end of the interval is the sample mean added to M. So it is 45420 + 574 = $45,994.

The 95% confidence interval for the income of store managers in the retail industry is ($44,846, $45,994), having a margin of error of $574.

Question b:

The interval mean that we are 95% sure that the true mean income of all store managers in the retail industry is between $44,846 and $45,994.

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