Answer:
(-6, 1)
Step-by-step explanation:
Answer:
So we use the t-distribution to compute a confidence interval for the average age of people using online dating services
Step-by-step explanation:
Confidence interval for a mean.
We have to decide between the t-distribution and the z-distribution.
T-distribution: We use the sample standard deviation.
Z-distribution: We use the population standard deviation.
In this problem:
The average age of those that were using online dating services was 35 years old with a sample standard deviation of 12 years.
So we use the t-distribution to compute a confidence interval for the average age of people using online dating services
Answer:
100 cm²
Step-by-step explanation:
A =b *h/2
b = 10cm
h = 20 cm
A = (20cm)*(10cm)/2
A = 100 cm²
