Statistics for Decision Making

Statistics for Decision Making

Decision-Making Statistics: 1. Question: (TCO 1) What method of data collection would you use to collect data for a study of college professor salaries at a specific college?

2. (TCO 2) The odds of winning the California Lottery are one in 22 million. This statement explains

3. Question: (TCO 2) The colors of cars on a used car lot are

four. question (TCO 1) A lobbyist for a major airline assigns a number to each legislator and then uses a computer to generate ten numbers at random. The lobbyist contacts the legislators assigned to these phone numbers. What sampling method is used?

5. Inquiry: (TCO 2) According to a recent survey conducted by a national women’s association, the average salary of 3500 of its 65,000 members was $73,000. This figure is a

6. Question: (TCO 2) Which is used more frequently?

7. Inquiry: (TCO 2) What is the variance if the standard deviation is 13.1?

(TCO 10) These data represent the ages of drivers and the number of accidents reported in Pennsylvania for each age group for a given year. (16, 6605), (17, 8932), (18, 8506), (19, 7349), (20, 6458), (Age, Number of Accidents) (21, 5974) Question 9: (TCO 9) A researcher discovered a significant relationship between a student’s IQ, a, grade point average, b, and SAT verbal section score, y. The multiple regression equation y = 250 + 1.5a + 80b can be used to represent the relationship. Predict the SAT verbal score (to the nearest whole number) of a student with an IQ of 130 and a GPA of 2.2.

Question: (TCO 9) Explain a r value of 0.11.

Question 11: (TCO 3) Use this table to answer the questions………….

1. Determine the class width.

2. Determine the first class’s midpoint.

3. Determine the first class’s class boundaries.

4. Describe the relative frequency of each class.

Decision-Making Statistics

12. Question: (TCO 3) The heights in inches of 18 randomly selected adult males in LA are as follows: 70, 69, 72, 57, 70, 66, 69, 73, 80, 68, 71, 68, 72, 67, 58, 74, 81, 72, 67, 58, 74, 81, 72, 67, 58, 74, 81, 72, 67, 58, 74, 81

 

MATH 221 Quiz for Week 5

 

1. (TCO 4) Three members of a club will be chosen to serve as officers. The first person chosen will be president, the second vice president, and the third secretary/treasurer. With 30 club members, how many ways can these officers be chosen? 2. (TCO 4) Which of the following cannot be a possibility?

3. (TCO 4) Describe the sample space of rolling a 6-sided die.

4. Question: (TCO 4) What is the likelihood of selecting a queen on the second draw if the first was a queen (no replacement)?

5. (TCO 4) A nursing class consists of 13 women and 18 men. What is the likelihood that a female student will be chosen at random to be the team leader?

Question 6: (TCO 4) Calculate the following: 3! ÷ (0! * 3!)

7. Inquiry: (TCO 5) Based on the information provided, determine whether the experiment is a binomial, Poisson, or neither. Every week, a man participates in a game in which he has a 21% chance of winning. The random variable is the number of times he wins over the course of 64 weeks. (TCO 5) Given a Poisson distribution with a mean of 4, what is the answer? Determine P(X 3). (TCO 5) Given the random variable X = 7, 8, with P(7) = 0.7 and P(8) = 0.3. Find E (X).

10. Question: (TCO 5) If X = -1, 12, 3, -4, and P(-1) = 0.3, P(-12) = 0.1, P(3) = 0.2, and P(-4) = 0.4, can the random variable X distribution be considered a probability distribution?

11. Question: (TCO 5) Can the distribution of the random variable X be considered a probability distribution if X = 2, 6, 10, 14, and P(2) = 0.2, P(6) = 0.3, P(10) = 0.4, and P(14) = 0.1?

12. (TCO 5) What type of distribution does the number of shoes in your closet represent?

13. (TCO 5) What type of distribution does your baby’s height represent?

14. Question: (TCO 5) What type of distribution is represented by the number of posts in our class at any given time?

Important information for writing discussion questions and participation

Welcome to class

Hello class and welcome to the class and I will be your instructor for this course. This is a -week course and requires a lot of time commitment, organization, and a high level of dedication. Please use the class syllabus to guide you through all the assignments required for the course. I have also attached the classroom policies to this announcement to know your expectations for this course. Please review this document carefully and ask me any questions if you do. You could email me at any time or send me a message via the “message” icon in halo if you need to contact me. I check my email regularly, so you should get a response within 24 hours. If you have not heard from me within 24 hours and need to contact me urgently, please send a follow up text to

I strongly encourage that you do not wait until the very last minute to complete your assignments. Your assignments in weeks 4 and 5 require early planning as you would need to present a teaching plan and interview a community health provider. I advise you look at the requirements for these assignments at the beginning of the course and plan accordingly. I have posted the YouTube link that explains all the class assignments in detail. It is required that you watch this 32-minute video as the assignments from week 3 through 5 require that you follow the instructions to the letter to succeed. Failure to complete these assignments according to instructions might lead to a zero. After watching the video, please schedule a one-on-one with me to discuss your topic for your project by the second week of class. Use this link to schedule a 15-minute session. Please, call me at the time of your appointment on my number. Please note that I will NOT call you.

Please, be advised I do NOT accept any assignments by email. If you are having technical issues with uploading an assignment, contact the technical department and inform me of the issue. If you have any issues that would prevent you from getting your assignments to me by the deadline, please inform me to request a possible extension. Note that working fulltime or overtime is no excuse for late assignments. There is a 5%-point deduction for every day your assignment is late. This only applies to approved extensions. Late assignments will not be accepted.

If you think you would be needing accommodations due to any reasons, please contact the appropriate department to request accommodations.

Plagiarism is highly prohibited. Please ensure you are citing your sources correctly using APA 7th edition. All assignments including discussion posts should be formatted in APA with the appropriate spacing, font, margin, and indents. Any papers not well formatted would be returned back to you, hence, I advise you review APA formatting style. I have attached a sample paper in APA format and will also post sample discussion responses in subsequent announcements.

Your initial discussion post should be a minimum of 200 words and response posts should be a minimum of 150 words. Be advised that I grade based on quality and not necessarily the number of words you post. A minimum of TWO references should be used for your initial post. For your response post, you do not need references as personal experiences would count as response posts. If you however cite anything from the literature for your response post, it is required that you cite your reference. You should include a minimum of THREE references for papers in this course. Please note that references should be no more than 5 years old except recommended as a resource for the class. Furthermore, for each discussion board question, you need ONE initial substantive response and TWO substantive responses to either your classmates or your instructor for a total of THREE responses. There are TWO discussion questions each week, hence, you need a total minimum of SIX discussion posts for each week. I usually post a discussion question each week. You could also respond to these as it would count towards your required SIX discussion posts for the week.

I understand this is a lot of information to cover in 5 weeks, however, the Bible says in Philippians 4:13 that we can do all things through Christ that strengthens us. Even in times like this, we are encouraged by God’s word that we have that ability in us to succeed with His strength. I pray that each and every one of you receives strength for this course and life generally as we navigate through this pandemic that is shaking our world today. Relax and enjoy the course!

Hi Class,

Please read through the following information on writing a Discussion question response and participation posts.

Contact me if you have any questions.

Important information on Writing a Discussion Question

  • Your response needs to be a minimum of 150 words (not including your list of references)
  • There needs to be at least TWO references with ONE being a peer reviewed professional journal article.
  • Include in-text citations in your response
  • Do not include quotes—instead summarize and paraphrase the information
  • Follow APA-7th edition
  • Points will be deducted if the above is not followed

Participation –replies to your classmates or instructor

  • A minimum of 6 responses per week, on at least 3 days of the week.
  • Each response needs at least ONE reference with citations—best if it is a peer reviewed journal article
  • Each response needs to be at least 75 words in length (does not include your list of references)
  • Responses need to be substantive by bringing information to the discussion or further enhance the discussion. Responses of “I agree” or “great post” does not count for the word count.
  • Follow APA 7th edition
  • Points will be deducted if the above is not followed
  • Remember to use and follow APA-7th edition for all weekly assignments, discussion questions, and participation points.
  • Here are some helpful links
  • The is a great resource

 

 

Explanatory

1.Question: (TCO 5) We are conducting a binomial experiment with p = 0.4 and n = 2.

(1) Create the probability distribution by displaying all x values and their corresponding probabilities.

(2) Determine the average, variance, and standard deviation.

2.Question: (TCO 4) Given that the student does not have a credit card, what is the likelihood that he is a sophomore?

3.Question: (TCO 4) Some students were asked if they had a credit card with them. The responses are listed below.

4.Question: (TCO 4) What is the likelihood that the student is a sophomore without a credit card?

 

MATH 221 Quiz for Week 7

1. (TCO 6) The standard deviation in the standard normal distribution is always

2. (TCO 6) What is the area under a normal curve with mu = 8 and sigma = 3?

3. Question: (TCO 6) If Larry receives a 70 on a physics test with a mean of 65 and a standard deviation of 5.8, where does he rank among his classmates?

4. Question: (TCO 6) What number corresponds to z = 3 in a normal distribution with mu = 25 and sigma = 6?

5. Inquiry: (TCO 6) Assume you took 100 samples of size 64 from a normally distributed population. If the variance of the population is 49, compute the standard deviation of the sample means. (TCO 6) The area to the left of the letter ‘z’ is 0.9976. What is the z-score for this area?

7. Question: (TCO 6) Determine P(9 x 22) when mu = 20 and sigma = 5.

(TCO 7) What is the critical z-value that corresponds to an 86 percent confidence level?

9. Question: (TCO 7) Determine the population mean margin of error for a 90% confidence interval when sigma is 4 and sample size is 36.

ten. Question: (TCO 7) The mean of a standard IQ test is 98, with a standard deviation of 16. We want to be 99.9% sure that we are within 8 IQ points of the true mean. Calculate the sample size. Question 11: (TCO 7) A private medical clinic wants to estimate its patients’ true mean annual income. The clinic’s price should be within $500 of the true mean. According to the clinic, the true population standard deviation is around $2,300. If the confidence level is 95%, calculate the sample size needed to achieve the desired accuracy.

Question 12: (TCO 7) An auditor wants to know what percentage of a bank’s commercial loan files are missing. When using a 95 percent confidence level, the auditor wants to be within 10% of the true proportion. How many files must be sampled by the auditor? Because there is no estimate of the proportion, use 0.5 for the population proportion.

Explanatory

1. Question: (TCO 7) Interpret a 95% confidence interval for the population mean of (3.355, 3.445).

2. Inquiry: (TCO 7) A nursing school wishes to calculate the true mean annual income of its graduates. It selects 200 alumni at random. The average annual income was $52,500, with a $1,800 standard deviation. Determine a 95% confidence interval for the true mean annual income of nursing school graduates. Make a statement about your confidence level and the interval you discovered.

 

3. Inquiry: (TCO 7) An auditor wants to know what percentage of a bank’s commercial loan files are missing. The auditor selects 60 files at random and discovers that 12 are missing. Estimate the true proportion of incomplete files for ALL commercial loans at the bank using a 95% confidence interval. Make a statement about your confidence level and the interval you discovered.

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