Question

Please show any calculations.

1. Your local Target store has reached out to you to design a survey. They would like you to design a 4-question survey. Two questions should yield categorical data and 2 questions should yield quantitative data. Please list your survey questions below.
2. Imagine that you bring your daughter to the doctor and she comments on how tall you are, stating “Wow you are tall, only 8% of the population is taller than you!” However, you recall talking about percentiles in our Intro to Stats Class. Rewrite that sentence correctly using the word ‘percentile’:
3. Driver’s education test scores could be described by a normal distribution (bell-shaped) curve. If the mean score was 45 and the standard deviation was 5, what percentage of the students could be expected to score between 45 and 50 points?
4. Give one example of how statistics can help you make more informed choices in your life.

Answer 1

Target Store Survey Questions

• Frequency of a visit to the store (Target or any retail) - Quantitative
• What is the expected delivery time if you want to get home-delivered - Quantitative
• Do you prefer home delivery over a visit to stores? - Categorical
• Would you prefer cash over a credit card? Categorical

Percentile

If I am taller than 92% of the population, the percentile is 92%

Normal Distribution

Mean = 45, Sd = 5, We need to find P(45 < X < 50), Using Z scores

P(45 < X < 50) = P(X < 50) - P(X<45)

So, 34.13% of students are expected to score between 45 and 50

Example of how statistics can help you make more informed choices in your life.

I use statistics to invest in the stock market. Analyzing the behavior of stocks from past performances and analyzing the market trend statistically helps me in informed decision making

Please let me know if you have any doubts. Happy to help.Please thumbs up if you like the solution. Thanks