What is the prudct of 7\9 and 6

14/3, or 4.6^bar

Step-by-step explanation:

first you'd just divide 7 by 9, resulting in , or 0.7^bar.

Then you'd multiply either by 6, resulting in the answers above. Fractions are easier than infinite numbers, so if you're able to do that, I'd suggest you do so.

Hope this helped!

When confidence level increases, margin of error increases thus making confidence interval wider.

Step-by-step explanation:

Given that a simple random sample with n=54 provided a sample mean of 22.5 and a sample standard deviation of 4.4.

Since n >30 but population std deviation is not known we can use only t critical value.

a) t critical = 2.006

Hence 90% confidence interval = Mean ±

=

b) t critical = 2.30687 = 2.31

Hence 90% confidence interval = Mean ±

=

c) t critical = 2.30687 = 2.31

Hence 90% confidence interval = Mean ±

=

d) When confidence level increases, margin of error increases thus making confidence interval wider.