1. A simple random sample of 35 full-time college students in 2020 in which the number of hours that they sleep during a weekday results in a mean of 6.48 hours with a standard deviation of 1.27 hours.Suppose we are asked to construct a 90% confidence interval for the population mean.

Determine each of the following values. Round each value (exceptt/2) to the nearest hundredth (second decimal value). Use the exact value of t/2that is found on the t-Table.

Please type your solution in the text entry box provided.

• Example:1.23or1.234(for t/2)

a. x =

b. s =

c. n =

d. x=

e. =

f. /2 =

g. df =

h. t/2=

i. Lower Bound =

j. Upper Bound =

k. We are% confident that the population mean is betweenand.

2. A simple random sample of 29 fatal car crashes in 2019 in which the driver had a positive blood alcohol concentration (BAC) results in a mean BAC of 0.19 gram per deciliter (g/dL) with a standard deviation of 0.05 gram per deciliter (g/dL). Suppose we are asked to construct a 90% confidence interval for the population mean.

Determine each of the following values. Round each value (except t/2) to the nearest hundredth (second decimal value). Use the exact value of t/2that is found on the t-Table.

Please type your solution in the text entry box provided.

• Example:1.23or1.234(for t/2)

a. x =

b. s =

c. n =

d. x=

e. =

f. /2 =

g. df =

h. t/2=

i. Lower Bound =

j. Upper Bound =

k. We are% confident that the population mean is betweenand.

3. How do you study for a test? Please use at least five complete sentences to explain.