Answer:
95% confidence interval = ( 28.9485, 40.1515 )
Step-by-step explanation:
sample size( n ) = 52
mean value ( x )= 34.55
std ( б ) = 20.12
H0 : <em>u </em>≤ 30
Ha : u > 30 ( claim )
95% confidence interval for mean SPF level ( df = 51 )
= mean value ± 
95% confidence interval = ( 28.9485, 40.1515 )
we cannot reject H0
The equation representing the minimum and maximum number of fishes which would fit into the tank is : 5 ≤ x ≤ 9
From the table given ;
- Method 2 will allow the maximum number of fish = 9
- Method 1 will allow the minimum number of fish = 5
To represent the maximum and minimum number of fish that will fit into the tank;
We could use an inequality expression to represent these range :
Let x represent the Number of fishes that would fit into the tank :
Therefore, the equation can be written thus :
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Answer: 12 boys at the movie
Step-by-step explanation:
The ratio of boys to girls is 4:7. There are 21 girls at the movie. This is 3 times more than the simplified ratio of girls to boys. Thus, to find the answer, multiply 4 by 3 to get 12 boys at the movie.
