QNT 351 Final Exam August 2017

1. The mean amount spent by a family of four on food is $500 per month with a standard deviation of $75. Assuming that the food costs are normally distributed, what is the probability that a family spends less than $410 per month? 0.1151 0.0362 0.8750 0.2158 2. As the size of the sample increases, what happens to the shape of the distribution of sample means? It cannot be predicted in advance. It is negatively skewed. It approaches a normal distribution. It is positively skewed. 3. What is the f...

1. The mean amount spent by a family of four on food is $500 per month with a standard deviation of $75. Assuming that the food costs are normally distributed, what is the probability that a family spends less than $410 per month? 0.1151 0.0362 0.8750 0.2158 2. As the size of the sample increases, what happens to the shape of the distribution of sample means? It cannot be predicted in advance. It is negatively skewed. It approaches a normal distribution. It is positively skewed. 3. What is the f...

1. The mean amount spent by a family of four on food is $500 per month with a standard deviation of $75. Assuming that the food costs are normally distributed, what is the probability that a family spends less than $410 per month? 0.1151 0.0362 0.8750 0.2158 2. As the size of the sample increases, what happens to the shape of the distribution of sample means? It cannot be predicted in advance. It is negatively skewed. It approaches a normal distribution. It is positively skewed. 3. What is the f...