1. For a 99% confidence interval for Mu = (10, 90) using thez-procedure, fill in the values for the following: (Hints: Where is x-bar in the interval? How many Margin of Errors make up the interval? What is the Z-value? Use the Margin of Error formula to find SE.)

(Make sure to include the calculation steps )

10|-------------------- x-bar---------------------|90

a. sample mean = ?

b. margin of error = ?

c. standard error of the mean=?

2. The basal or resting heart rate typically has a mean of 70 beats per minute (bpm) with a standard deviation of 10 bpm.

A sample of 25 students relaxing before the Bio-stat midterm measured a mean = 75.

• Construct a 95% confidence interval for Mu. (Make sure to include the calculation steps )

a. Z or t Value associated with 95% CL

b. Standard Error (SE) = ?

c. Margin of Error (M) = ?

d. LCL = ?

e. UCL =?

3. Self-competency test scores are taken before and after watching a YouTube video on how to measure blood pressure. The Paired data are:

to measure blood pressure. The Paired data are:

Before After Delta (After - Before)

75 76 _(a)__

61 72 _(b)__

67 78 __(c)_

75 73 _(d)_

Given: Standard Deviation of the Delta column: sd = 6. 75, find:

• Find a, b, c, d & the Sample Size,
• Degrees of Freedom,df
• Mean of the Deltas, xd

Test the to see if the video had a significant impact in competency.

• Hypothesis statements
• Standard Error, SE =
• Test statistic, tstat =
• p-value (use Table C)
• Conclusion of significance