The amount of syrup that people put on their pancakes is normally distributed with mean 55 mL and standard deviation 10 mL. Suppose that 15 randomly selected people are observed pouring syrup on their pancakes. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N( 55 10 b. What is the distribution of ? - N( 55 c. If a single randomly selected individual is observed, find the probability that this person consumes is between 57.7 mL and 61.3 mL. 0.1292 d. For the group of 15 pancake eaters, find the probability that the average amount of syrup is between V, 2.5820 v) o o 57.7 ml and 61.3 mL. 0.1396 e. For part d), is the assumption that the distribution is normal necessary? O NoO Yes o

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The text discusses a study on syrup consumption for pancakes, modeled with a normal distribution. The amount of syrup is normally distributed with a mean of 55 mL and a standard deviation of 10 mL, based on a sample of 15 individuals. Here's an analysis of the questions:

a. **Distribution of X**: \( X \sim N(55, 10) \)  
   This indicates that the random variable \( X \), representing individual syrup consumption, follows a normal distribution with a mean of 55 mL and standard deviation of 10 mL.

b. **Distribution of \(\bar{x}\)**: \( \bar{x} \sim N(55, 2.5820) \)  
   The sample mean \(\bar{x}\) of the syrup consumption also follows a normal distribution, with a mean of 55 mL and a standard deviation of approximately 2.5820 mL.

c. **Probability for Individual Consumption**:  
   The probability that a randomly selected person's syrup consumption is between 57.7 mL and 61.3 mL is 0.1292.

d. **Probability for Group Average**:  
   The probability that the average syrup consumption for the group of 15 is between 57.7 mL and 61.3 mL is 0.1396.

e. **Normal Distribution Assumption**:  
   The assumption that the distribution is normal is necessary for part d, and the answer is "Yes."
Transcribed Image Text:The text discusses a study on syrup consumption for pancakes, modeled with a normal distribution. The amount of syrup is normally distributed with a mean of 55 mL and a standard deviation of 10 mL, based on a sample of 15 individuals. Here's an analysis of the questions: a. **Distribution of X**: \( X \sim N(55, 10) \) This indicates that the random variable \( X \), representing individual syrup consumption, follows a normal distribution with a mean of 55 mL and standard deviation of 10 mL. b. **Distribution of \(\bar{x}\)**: \( \bar{x} \sim N(55, 2.5820) \) The sample mean \(\bar{x}\) of the syrup consumption also follows a normal distribution, with a mean of 55 mL and a standard deviation of approximately 2.5820 mL. c. **Probability for Individual Consumption**: The probability that a randomly selected person's syrup consumption is between 57.7 mL and 61.3 mL is 0.1292. d. **Probability for Group Average**: The probability that the average syrup consumption for the group of 15 is between 57.7 mL and 61.3 mL is 0.1396. e. **Normal Distribution Assumption**: The assumption that the distribution is normal is necessary for part d, and the answer is "Yes."
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