The type of data that combines voice, picture and motion is

Correct Answer: D

Rationale: Multimedia refers to data integrating multiple forms, such as voice (audio), pictures (images), and motion (video). 'Multimedia,' is correct because it encompasses all these elements, as defined in media studies (e.g., Chapman's Digital Multimedia), used in applications like video conferencing. 'Audio,' is sound alone. 'Video,' includes motion and visuals but typically excludes standalone voice. 'Picture,' is static images only. Multimedia's comprehensive nature, combining these distinct media types into a cohesive experience, distinguishes it, making D the precise answer for data with voice, picture, and motion together.

Correct Answer: B

Rationale: Premedication before anesthesia aims to optimize patient condition. 'To attenuate vagal responses,' is correct because drugs like atropine reduce vagal-induced bradycardia or secretions, per anesthesiology standards (e.g., Stoelting's Pharmacology). 'To increase volume of gastric content,' is false; it's minimized to prevent aspiration. 'To stimulate secretions,' is incorrect; drying secretions is preferred. 'To increase fear and anxiety,' opposes premedication's anxiolytic goal (e.g., midazolam). Attenuating vagal responses enhances safety, making B the accurate answer.

Correct Answer: B

Rationale: A pilot study tests feasibility before a full research project. 'A small scale study conducted in advance...,' is correct, describing its role in refining methods and logistics, per research methodology (e.g., Polit & Beck). 'A scientific study carried out on pilots,' misinterprets pilot.' 'The first and most important step,' overstates its priority; it's optional. 'A study conducted simultaneously...,' is incorrect; pilots precede, not parallel, main studies. B's focus on pre-testing feasibility matches standard practice, making it the accurate answer.

Correct Answer: A

Rationale: Nominal variables are categorical without order. 'Ethnicity,' is correct, as it labels groups (e.g., Asian, Caucasian) without ranking, per statistical classification (e.g., Agresti). 'Socio-economic status,' is ordinal, with levels (e.g., low, high). 'Class positions,' is ordinal, implying rank. 'Weight,' is ratio, measurable with a zero. Ethnicity's lack of numerical or hierarchical properties makes A the precise nominal answer.

Correct Answer: C

Rationale: Cardiac output (CO) is heart rate (HR) times stroke volume (SV). Given HR = 84 bpm and SV = 60 ml (0.06 L), CO = 84 × 0.06 = 5.04 L/min, approximated as 5 L/min. '5 L/min,' is correct, per physiology (e.g., Guyton). The question's exercise scenario (13 L/min) is post-exercise, but initial CO aligns with resting values. Choices A, B, and D miscalculate. C's accuracy makes it the answer.