Free Exam: Exercises - Chap2 - Hypothesis testing and inference
Number of Questions in Test: 11
Number of Questions in Preview: 5
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Register nowQuestion 1
Which of these statements are true?
| Type: | Multiple response |
| Points: | 1 |
| Randomize answers: | No |
Question 2
Which of these random variables are discrete?
| Type: | Multiple response |
| Points: | 1 |
| Randomize answers: | No |
Question 3
A random sample size n is drawn from a population with μ = 1100 and σ = 200. Which sample size would be necessary to reduce the standard error of the mean (SEM) to 20? (Hint: use the Central Limit Theorem)
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | No |
Question 4
Which of these statements are true?
| Type: | Multiple response |
| Points: | 1 |
| Randomize answers: | No |
Question 5
A study concluded that a mean heart rate variation of 50 beats/min with a standard deviation of 23 in 580 normal healthy subjects. What proportion of "individuals" can be expected to have a heart rate variation between 27 and 73 assuming a normal distribution? (Hint: Use Empirical Rule)
| Type: | Multiple choice |
| Points: | 0.5 |
| Randomize answers: | No |