Answer:
38 : 133 and 16 : 56 are equivalent
Step-by-step explanation:
Given
1) and
2) and
Required
Determine which is equivalent
1) and
Divide by 19
--- can't be further simplified
Divide by 8
Hence:
and
are equivalent
2) and
Divide by 5
Divide by 28
Hence, both are not equivalent.
Answer:
The 99% confidence interval would be given by (0.286;0.562)
Step-by-step explanation:
Information given:
represent the families owned at least one DVD player
represent the total number of families
represent the estimated proportion of families owned at least one DVD player
In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by and
. And the critical value would be given by:
The confidence interval for the mean is given by the following formula:
If we replace the values obtained we got:
The 99% confidence interval would be given by (0.286;0.562)