MATH 221 Statistics For Decision Making (MATH221)

Creating Graphs 1. Create a pie chart for the variable Car Color: Select the column with the Car variable, including the title of Car Color. Click on Insert, and then Recommended Charts. It shoul d show a clustered column and click OK. Once the chart is shown, right click on the chart (main area) and select Change Chart Type. Select Pie and OK. Click on the pie slices, right click Add Data Labels, and select Add Data Callouts. Add an appropriate title. Copy and paste the chart here. (4 points) 2...

Statistics for decision making week 3 quiz chapters 1,2,& 3 Question 1 2 / 2 pts (CO 1) A survey of 128 DeVry statistics students found that 83% read the announcements each week. What is the population and what is the sample? Question 2 0 / 2 pts (CO 1) The measurements of 100 products from the assembly line show that 99% are correct. Is this percentage a parameter or a statistic and why? Question 3 2 / 2 pts (CO 1) Classify the data of the heights of ladders produced by a tool company. Ques...

1. Question: (TCO 9) The annual Salary of an electrical engineer is given in terms of the years of experience by the table below. Find the equation of linear regression for the above data and obtain the expected salary for an engineer with 45 years of experience. Round to the nearest $100. Your Answer: 97,100 88,300 56,700 92,800 (TCO 5) A company produces window frames. Based on a statistical analysis, we found that 15% of their product is defective. They have shipped 10 windows to on...

Complete the following by writing a response to three of the four following questions (Download Include Solution for All Four Questions). For each question, your response should be 2 or more paragraphs. Make it clear which question you are answering and use correct grammar throughout. If you answer all four questions, only the first three provided will be graded. Describe how you could use hypothesis testing to help make a decision in your current job, a past job, or a life situation. Include a...

Question: (CO6) From a random sample of 68 businesses, it is found that the mean time that employees spend on personal issues each week is 45.8 hours with a standard deviation of 0.35 hours. What is the 95% confidence interval for the amount of time spent on personal issues? Question: If a confidence interval is given from 8.50 to 10.25 and the mean is known to … 9.375, what is the maximum error? Question: (CO6) If the standard deviation of a sample decreases without other changes, what is mos...

Question: (CO 4) Consider the following table: ……..If you created the probability distribution for these data, what would … the probability of 50-59? Question: (CO 4) Consider the following table of hours worked by part-time employees. These employees must work in 5 hour blocks………Find the mean of this variable. Question: (CO 4) Consider the following table: …….. Find the variance of this variable. Question: (CO 4) Consider the following table: ……. Find the standard deviation ...

Question: Determine whether the following are nominal, ordinal, interval, and ratio. Daily temperatures in Ripon, WI Test scores in statistics class Question: The following numbers represent the weights in pounds of six 7-year old children in Mrs. Jones’ 2nd grade class. {25, 60, 51, 47, 49, 45} Find the mean; median; mode; variance; standard deviation. Question: If the variance is 846, what is the standard deviation? Question: If we have the following data: 34, 38, 22, 21, 29, 37, 40, 41, 22,...

Question: (CO 1) A survey of 1272 pre-owned vehicle shoppers found that 8% bought the extended warranties. What is the population and what is the sample? Question: (CO 1) In asking all 349 second graders in a school district, it is found that on average, these second graders have 2.5 pets. Is this number a parameter or a statistic and why? Question: (CO 1) Classify the data of the number of customers at a restaurant. Question: (CO 1) The data set that lists a company’s competitors and their lo...