RD exam topics: PKU, Nominal vs Ordinal Variables, Discrete vs Continuous Variables

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This episode covers PKU, nominal vs ordinal variables, and discrete vs continuous variables.
A tube feeding is running continuously at 80mL/hr and provides 1,000 calories, 64 grams of protein, and 840 mL of water per 1,000 mL of formula. The patient requires 2,000 calories and 135 grams of protein. Does the current rate meet his estimated needs?
 
A. Yes, but the feed should be changed to 12-hour cyclic rate
B. No, the rate should be changed to 85 mL/hr to meet his estimated needs
C. Yes, the current rate meets his needs
D. No, the rate should be changed to 90 mL/hr to meet his estimated needs
 
How does the diet of a child with PKU differ from that of a child without PKU?
A. The child with PKU has increased need for exogenous glucose
B. Aspartame should be used instead of raw sugar for the child with PKU
C. The child with PKU must restrict phenylalanine and supplement tyrosine
D. The child with PKU has increased protein needs
 
A study is being conducted examining marital status and level of life satisfaction. The data collection period will last three weeks. Which of the following would be an example of a nominal variable?
A. Marital status
B. Level of happiness
C. The three week data collection period
D. All of the choices listed
 
A cook is preparing dinner for 15 people at a party. 9 of these people are dietitians. The cook just grilled a steak and checked its temperature, which was 168.4 degrees. Which of the following represents a continuous variable in this scenario?
A. The number of people at the party
B. The temperature of the steak
C. The number of dietitians
D. None of the choices listed