Answer:b 1/2
Step-by-step explanation:
Answer:
Quantitative discrete data.
Step-by-step explanation:
We have been given a data for the number of machines in five gyms. One gym has 12 machines, one gym has 15 machines, one gym has ten machines, one gym has 22 machines, and the other gym has 20 machines. We are asked to determine the type of the data.
We can see that our given data represents quantity of machines, so our data will be a quantitative data.
Since each gym has a specific number of machines, so our data is discrete and it is not continuous.
Therefore, our given data is a quantitative discrete data.
Answer:
The swimming pool is 5 times bigger.
Step-by-step explanation:
5 x 3.14=15.7 ft
15 x 2 x 3.14= 78.5 ft
78.5/15.7=5 times bigger
Answer:
Yes. The data provide enough evidence to support the claim that the mean weight of one-year-old boys is greater than 25 pounds.
P-value=P(t>2.84)=0.0024
Step-by-step explanation:
Hypothesis test on the population mean.
The claim is that the mean weight of one-year-old boys is greater than 25 pounds.
Then, the null and alternative hypothesis are:

The significance level is α=0.05.
The sample size is n=354. The sample mean is 25.8 pounds and the sample standard deviation is 5.3 pounds. As the population standard deviation is estimated from the sample standard deviation, we will use a t-statistic.
The degrees of freedom are:

The t-statistic is:

For a right tailed test and 353 degrees of freedom, the P-value is:

As the P-value is smaller than the significance level, the effect is significant and the null hypothesis is rejected.
There is enough evidence to support the claim that the mean weight of one-year-old boys is greater than 25 pounds.