Question MATH221 Statistics for Decision Making Week 1 Homework Question 1In a survey of 1000 adults, 34% found they prefer charcoal to gas grills. The 34% would be considered a: Statistic Population Parameter Sample Question 2The chances of winning the Maryland lottery are one chance in twenty-two million. The probability would…
Question MATH221 Statistics for Decision Making Week 5 Homework Question 1From 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 3.54. What is the 95% confidence interval for the amount of time spent on administrative…
Question MATH221 Statistics for Decision Making Week 4 Homework Question 1The length of time a person takes to decide which shoes to purchase is normally distributed with a mean of 8.54 minutes and a standard deviation of 1.91. Find the probability that a randomly selected individual will take less than 6 minutes to select a…
Question MATH221 Statistics for Decision Making Week 3 Homework Question 1Let x represent the height of first graders in a class. This would be considered what type of variable: Nonsensical Lagging Discrete Continuous Question 2Let x represent sheets of paper in a package. This would be considered what type of variable:…
Question MATH221 Statistics for Decision Making Week 2 Homework Question 1 Given the following information, find the probability that a randomly selected student will be very short. Number of students who are very short: 45, short: 60, tall: 82, very tall: 21 28.8% 21.6% 21.0% 39.4% Question 2Given the following information,…
Question MATH221 Statistics for Decision Making Week 8 Quiz Question 1If neighbors wanted to have a speed bump installed on one part of the road, which statistical method would be most effective. Regression with speed as the dependent variable Hypothesis testing with a null hypothesis that the speed is less than or equal…
Question MATH221 Statistics for Decision Making Week 7 Quiz Question 1(CO 6) The coefficient of determination is represented by what notation? r β ρ r2 Question 2(CO 6) Two variables have a negative linear correlation. Does the independent variable increase or decrease as the dependent variable increases? Independent variable decrease…
Question MATH221 Statistics for Decision Making Week 6 Quiz Question 1(CO 5) A company claims that its heaters last less than 5 years. Write the null and alternative hypotheses and note which is the claim. Ho: μ ≥ 5, Ha: μ < 5 (claim) Ho: μ > 5 (claim), Ha: μ ≤ 5…
Question MATH221 Statistics for Decision Making Week 5 Quiz Question 1(CO 4) From a random sample of 55 businesses, it is found that the mean time that employees spend on personal issues each week is 4.9 hours with a standard deviation of 0.35 hours. What is the 95% confidence interval for the amount of time…
Question MATH221 Statistics for Decision Making Week 4 Quiz Question 1 (CO 3) The speed of cars on a stretch of road is normally distributed with an average 42 miles per hour with a standard deviation of 5.9 miles per hour. What is the probability that a randomly selected car is violating the speed limit…
