Math221 week 5 Study guides, Class notes & Summaries

Math221 Wk5 Homework From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.69 with a population standard deviation of 3.54. What is the 95% confidence interval for the amount of time spent on administrative issues? Homework Help: 5VA. Confidence intervals with population standard deviation (Links to an external site.) (1:42) 5DA. Concept and meaning of confidence intervals (Links to an external site.) (DOCX) (20.71, 22.67)...

1. Question:(CO 3) Consider the following table. If you created the probability distribution for these data, what would be the probability of 40-49? 2. Question:(CO 3) 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. 3. Question:(CO 3) Consider the following table. Find the variance of this variable. 4. Question:(CO 3) Consider the following table. Find the standard deviation of this variable. 5. Q...

1. Question:From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 20.53 with a population standard deviation of 3.23. What is the95% confidence interval for the amount of time spent on administrative issues? 2. Question:If a confidence interval is given from 43.85 up to 61.95 and the mean is known to be 52.90, what is the margin of error? 3. Question:If a computer manufacturer needed a supplier that could produce parts that...

MATH221 Statistics for Decision Making Week 4 Lab Name: _______ Adrian Arneson ________________ Statistical Concepts:  Probability  Binomial Probability Distribution Calculating Binomial Probabilities NOTE: For question 1, you will be using the same data file your instructor gave you for the Week 2 Lab. 1. Using the data file from your instructor (same one you used for the Week 2 Lab), calculate descriptive statistics for the variable (Coin) where each of the thirty-five student...

Math221 Wk5 Homework From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.69 with a population standard deviation of 3.54. What is the 95% confidence interval for the amount of time spent on administrative issues? Homework Help: 5VA. Confidence intervals with population standard deviation (Links to an external site.) (1:42) 5DA. Concept and meaning of confidence intervals (Links to an external site.) (DOCX) (2...

MATH221 Statistics for Decision Making Week 4 Lab Statistical Concepts: • Probability • Binomial Probability Distribution Calculating Binomial Probabilities NOTE: For question 1, you will be using the same data file your instructor gave you for the Week 2 lab. 1. Using the data file from your instructor (same one you used for the Week 2 lab), calculate descriptive statistics for the variable (Coin) where each of the thirty-five students in the sample flipped a coin 10 times. Round y...

Final Exam Review Questions – MATH221 You should work each of the following on your own, then review the solutions guide. DO NOT look at the solutions guide first. 1. Determine whether the foll owing are nominal, ordinal, interval, and ratio. a. Daily temperatures in Ripon, WI b. Test scores in statistics class Solution: (a) would be interval as there is no zero while (b) would be ratio as there is a zero. 2. The following numbers represent the weights in pounds of six 7-year old children in M...

Look in the newspapers, magazines, and other news sources for results of a survey or poll that show the confidence interval, usually shows as a +/- some amount. Describe the survey or poll and then describe the interval shown. How does knowing the interval, rather than just the main result, impact your view of the results?

1. Question:(CO 3) Consider the following table. If you created the probability distribution for these data, what would be the probability of 30-39? 2. Question:(CO 3) 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. 3. Question:(CO 3) Consider the following table.Find the variance of this variable. 4. Question:(CO 3) Consider the following table.Find the standard deviation of this variable. 5. Que...

1. Question:(CO 3) Consider the following table. If you created the probability distribution for these data, what would be the probability of 60-69? 2. Question:(CO 3) 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. 3. Question:(CO 3) Consider the following table. Find the variance of this variable. 4. Question:(CO 3) Consider the following table. Find the standard deviation of this variable. 5. Q...