A sample of seven states was selected. Information about the…

A sample of seven states was selected. Information about the cost of living indexes for groceries and housing is listed. They want to predict the grocery index based on the housing index. Find the correlation coefficient. Round to three decimal places and include the negative sign if appropriate.   State Grocery Housing West Virginia  98.9 60.2 Oklahoma  94.6 68.6 Kansas  94.9 73.9 Iowa  96 74.8 Indiana  97.4 76.2 Tennessee  96.6 83.7 Michigan  98.3 72.5

The number of sunny days in a year in a certain region follo…

The number of sunny days in a year in a certain region follows a normal distribution with a mean of 120 days and a standard deviation of 25 days. A climatologist wants to figure out what a likely range of outcomes is for the number of sunny days. What is the upper bound to an interval in which the number of sunny days will fall 80% of the time? Provide your answer rounded to the nearest whole number.

You are a business analyst working for a tech company in Seo…

You are a business analyst working for a tech company in Seoul. The company is planning a report on smartphone usage among different age groups, with a focus on the younger generation. To provide accurate information to your clients, your supervisor has asked you to estimate the proportion of young adults (aged 18-24) who use their smartphones for more than 5 hours a day. You have collected a sample data set from various young adults in Seoul. Using this data, estimate the proportion of young adults who use their smartphones for more than 5 hours a day. Use a 90% confidence level for your estimate and round your answers to four decimal places.   Here is the sample data you collected (hours per day of smartphone usage):   4, 8, 3, 7, 3, 3, 3, 1, 2, 3, 6, 3, 9, 10, 3, 1, 8, 4, 1, 8, 2, 4, 1, 9, 4, 2, 9, 1, 2, 10, 4, 6, 7, 4, 7, 9, 8, 4, 2, 6 HELPFUL NOTE: Copy and paste the data into an Excel workbook. If it jams it all into a single cell, use the “text to columns” function in the Data ribbon to tell it to split it into individual cells using a comma delimiter. Left bound = [leftbound] Right bound = [rightbound]