Podcast
Questions and Answers
What proportion of men aged 18-24 are too small for size medium clothes?
What proportion of men aged 18-24 are too small for size medium clothes?
- 0.4315 (43.15%)
- 0.5000 (50.00%)
- 0.3446 (34.46%) (correct)
- 0.2500 (25.00%)
What is the correct method to find the probability of x < 69 in this scenario?
What is the correct method to find the probability of x < 69 in this scenario?
- Use only Table A
- Do manual calculations using z-scores
- Use R for accurate calculations (correct)
- Use the 68-95-99.7% rule
What does the text suggest about using z-scores with more than 2 decimal places?
What does the text suggest about using z-scores with more than 2 decimal places?
- R provides more accurate results for z-scores with more than 2 decimal places (correct)
- Z-scores with more than 2 decimal places should be rounded off
- Z-scores with more than 2 decimal places are accurate for Table A
- Table A is better for z-scores with more than 2 decimal places
Why is it mentioned that approximating the proportion for >74 using 68-95-99.7% underestimates the proportion?
Why is it mentioned that approximating the proportion for >74 using 68-95-99.7% underestimates the proportion?
When should the 68-95-99.7% rule be used according to the text?
When should the 68-95-99.7% rule be used according to the text?
What difference is highlighted between R and Table A in the text?
What difference is highlighted between R and Table A in the text?
Which step involves identifying the specific problem and interval of interest?
Which step involves identifying the specific problem and interval of interest?
If the 68-95-99.7% rule cannot be used, which method is recommended for finding the shaded area under the curve (AUC)?
If the 68-95-99.7% rule cannot be used, which method is recommended for finding the shaded area under the curve (AUC)?
What is the purpose of Step 5: State the solution?
What is the purpose of Step 5: State the solution?
If the interval of interest is within 1 standard deviation of the mean, which rule can be used to approximate the proportion?
If the interval of interest is within 1 standard deviation of the mean, which rule can be used to approximate the proportion?
What is the purpose of Step 3: Draw the distribution?
What is the purpose of Step 3: Draw the distribution?
Which step involves using statistical software or tables to find the shaded area under the curve?
Which step involves using statistical software or tables to find the shaded area under the curve?
Which method can be used to find the z-score corresponding to a given proportion?
Which method can be used to find the z-score corresponding to a given proportion?
What is the equation used to convert from z-score back to the original scale?
What is the equation used to convert from z-score back to the original scale?
What is the interval of heights that falls between 2 and 3 standard deviations above the mean for men aged 18-24 with a normal distribution of N(70, 2.5) inches?
What is the interval of heights that falls between 2 and 3 standard deviations above the mean for men aged 18-24 with a normal distribution of N(70, 2.5) inches?
What proportion of men have heights between 2 and 3 standard deviations above the mean, according to the 68-95-99.7% rule?
What proportion of men have heights between 2 and 3 standard deviations above the mean, according to the 68-95-99.7% rule?
Which of the following is NOT a benefit of using the qnorm() function in R to find z-scores?
Which of the following is NOT a benefit of using the qnorm() function in R to find z-scores?
