The Week One Homework assignment will cover the material from Chapters 1 and 2. Complete the following problems:
Use the following information to answer the next 3 questions.A grocery store is interested in how much money, on average, their customers spend each visit in the produce department. Using their store records, they draw a sample of 1,000 visits and calculate each customer’s average spending on produce.
1. Identify the population, sample, parameter, statistic, variable, and data for this example.
- population
- sample
- parameter
- statistic
- variable
- data
2. What kind of data is “amount of money spent on produce per visit”?
- qualitative
- quantitative-continuous
- quantitative-discrete
3. The study finds that the mean amount spent on produce per visit by the customers in the sample is $12.84. This is an example of a:
- population
- sample
- parameter
- statistic
- variable
4. A psychologist is interested in whether the size of tableware (bowls, plates, etc.) influences how much college students eat. He randomly assigns 100 college students to one of two groups: the first is served a meal using normal-sized tableware, while the second is served the same meal, but using tableware that it 20 percent smaller than normal. He records how much food is consumed by each group. Identify the following components of this study.
- population
- sample
- experimental units
- explanatory variable
- treatment
- response variable
Use the following information to answer the next 3 questions.10; 11; 15; 15; 17; 22
5. Compute the mean and standard deviation for this data; use the sample formula for the standard deviation.
6. What number is two standard deviations above the mean of this data?
7. Express the number 13.7 in terms of the mean and standard deviation of this data.
8. In a biology class, the scores on the final exam were normally distributed, with a mean of 85, and a standard deviation of five. Susan got a final exam score of 95. Express her exam result as az-score, and interpret its meaning.
Submit your answers to the assignment drop-box. Be sure to show your work and explain your answers. This is required in order to receive full credit.Please be sure to highlight your final answers each week!