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 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 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…
Question MATH221 Statistics for Decision Making Week 3 Quiz Question 1(CO 3) Consider the following table: Age Group Frequency 18-29 983 30-39 784 40-49 686 50-59 632 60-69 541 70 and over 527 If you created the probability distribution for these data, what would be the probability of 40-49? 0.189 0.165 0.425…
Question MATH221 Statistics for Decision Making Week 2 Quiz Question 1(CO 2) A random number generator is used to select a number from 1 to 100. What is the probability of selecting an odd number? 0.077 0.500 0.050 0.250 Question 2(CO 2) What is the sample space of flipping three coins,…
Question MATH221 Statistics for Decision Making Week 1 Quiz Question 1(CO 1) Among 500 people at the concert, a survey of 35 found 28% found it too loud. What is the population and what is the sample? Population: 500 at that concert; Sample: the 28% who found it too loud Population: all concert…
