Straighterline MAT150 Business Statistics Graded Exam 2 (New Version August 2024) Graded 100%

Straighterline MAT150 Business Statistics Graded Exam 2 (New Version August 2024) Graded 100% We are a team of experts offering course/class attendance (including final proctored exams!!) for all Straighterline, Online ATI, HESI, NCLEX, Portage Learning, Sophia, Nursing, Business etc courses. We also write essays, discussion posts, research papers and school assignments. Should you need any of these services, Contact us via email: or : +1 (540) 753-5914. Guaranteed Passing! Question 1 Correct 5.00 points out of 5.00 Flag question Question text If A and B are mutually exclusive events with P(A) = 0.2 and P(B) = 0.6, then P(A or B) = _____. Select one: a. 0.80 b. 0.40 c. 0.00 d. 0.12 Question 2 Correct 5.00 points out of 5.00 Flag question Question text When applying the special rule of addition for mutually exclusive events, the joint probability is _______. Select one: a. 1 b. 0 c. 0.5 d. unknownQuestion 3 Correct 5.00 points out of 5.00 Flag question Question text A gumball machine has just been filled with 50 black, 150 white, 100 red, and 100 yellow gumballs that have been thoroughly mixed. Sue and Jim each purchase one gumball. What is the likelihood that both Sue and Jim will get red gumballs? Select one: a. 0.33 b. 0.75 c. 0.50 d. 0.062 Question 4 Correct 5.00 points out of 5.00 Flag question Question text When an experiment is conducted "without replacement," _______. Select one: a. events are equally likely b. the probability of two or more events is computed as a joint probability c. events are dependent d. the experiment can be illustrated with a Venn diagram Question 5 Correct 5.00 points out of 5.00Flag question Question text You are assigned to design color codes for different parts. Three colors are used to code on each part. Once a combination of three colors is used—such as green, yellow, and red—these three colors cannot be rearranged to use as a code for another part. If there are 35 combinations, how many colors are available? Select one: a. 9 b. 7 c. 11 d. 5 Question 6 Correct 5.00 points out of 5.00 Flag question Question text An Airbnb home has installed a combination lock with pushbuttons labeled A though F (six buttons) and uses four of these buttons in any order. Pushbuttons cannot be used more than once to unlock the door. For example, a code such as AFDC is allowed, but AFDA is not. How many different codes does this lock provide? Select one: a. 24 b. 180 c. 360 d. 1,296 Question 7 Correct 5.00 points out of 5.00Flag question Question text A lamp manufacturer designed five lamp bases and four lampshades that could be used together. How many different arrangements of base and shade can be offered? Select one: a. 5 b. 10 c. 15 d. 20 Question 8 Correct 5.00 points out of 5.00 Flag question Question text The following is a Poisson probability distribution with µ = 0.1: x P(x) 0 0.9048 1 0.0905 2 0.0045 3 0.0002 The variance of the distribution is ______. Select one: a. 1.0 b. 0.1 c. 3.0 d. 0.9046 Question 9 Correct5.00 points out of 5.00 Flag question Question text In a large metropolitan area, past records revealed that 30% of all the high school graduates go to college. From 20 graduates selected at random, what is the probability that exactly 8 will go to college? Select one: a. 0.400 b. 0.887 c. 0.114 d. 0.231 Question 10 Correct 5.00 points out of 5.00 Flag question Question text A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month. Number of Days Absent Probability 0 0.60 1 0.20 2 0.12 3 0.04 4 0.04 5 0.00 What is the mode of the distribution? Select one: a. 2.5 daysb. 3 days c. 0 days d. 0.72 days Question 11 Correct 5.00 points out of 5.00 Flag question Question text Which of the following is NOT a characteristic of a binomial probability distribution? Select one: a. The probability of success remains constant from trial to trial. b. Each trial is independent. c. Each outcome is mutually exclusive. d. The number of trials is limited to two. Question 12 Correct 5.00 points out of 5.00 Flag question Question text Reference the following table: x P(x) 0 0.130 1 0.346 2 0.346 3 0.154 4 0.026 What is the variance of the distribution? Select one:a. 1.0000 b. 1.1616 c. 0.9820 d. 0.9643 Question 13 Correct 5.00 points out of 5.00 Flag question Question text Reference the following table: x P(x) 0 0.270 1 0.206 2 0.206 3 0.194 4 0.124 What is the variance of the distribution? Select one: a. 1.2616 b. 1.0000 c. 1.8836 d. 0.8820 Question 14 Correct 5.00 points out of 5.00 Flag question Question textA company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month. Number of Days Absent Probability 0 0.60 1 0.20 2 0.12 3 0.04 4 0.04 5 0.00 What is the variance of the number of days absent? Select one: a. 5.00 b. 1.1616 c. 55.52 d. 1.41 Question 15 Correct 5.00 points out of 5.00 Flag question Question text An analysis of the grades on the first test in History 101 revealed that they approximate a normal curve with a mean of 75 and a standard deviation of 8. The instructor wants to award the grade of A to the upper 10% of the test grades. To the nearest percent, what is the dividing point between an A and a B grade? Select one: a. 85 b. 80 c. 95 d. 90 Question 16 Correct5.00 points out of 5.00 Flag question Question text What is an important similarity between the uniform and normal probability distributions? Select one: a. The mean and median are equal. b. They are negatively skewed. c. The mean, median, and mode are all equal. d. About 68% of all observations are within one standard deviation of the mean. Question 17 Correct 5.00 points out of 5.00 Flag question Question text The z-value for a standard normal distribution ________. Select one: a. is always equal to zero b. can be either positive or negative c. is always positive d. is always equal to the value of the population mean Question 18 Correct 5.00 points out of 5.00 Flag question Question textHow many different samples of size 4 can be selected from a population of size 8? Select one: a. 70 b. 8 c. 1,680 d. 32 Question 19 Correct 5.00 points out of 5.00 Flag question Question text Manufacturers were subdivided into groups by volume of sales. Those with more than $100 million in sales were classified as large; those from $50 to $100 million as medium size; and those between $25 and $50 million, and so on. Samples were then selected from each of these groups. What is this type of sampling called? Select one: a. Cluster sampling b. Systematic sampling c. Simple random sampling d. Stratified random sampling Question 20 Correct 5.00 points out of 5.00 Flag question Question text The BLS uses sampling for its National Compensation Survey to report employment costs. In its first stage of sampling, it divides the U.S. into geographic regions. What type of sampling is this? Select one: a. Stratifiedb. Random c. Cluster d. Systematic Question 21 Correct 5.00 points out of 5.00 Flag question Question text When all the items in a population have an equal chance of being selected for a sample, the process is called ______. Select one: a. z-score b. simple random sampling c. sampling error d. nonprobability sampling Question 22 Correct 5.00 points out of 5.00 Flag question Question text What is the difference between a sample mean and the population mean called? Select one: a. Point estimate b. Standard error of the mean c. Interval estimate d. Sampling error Question 23 Correct 5.00 points out of 5.00Flag question Question text The Office of Student Services at a large western state university maintains information on the study habits of its full-time students. Their studies indicate that the mean amount of time undergraduate students study per week is 20 hours. The hours studied follows the normal distribution with a population standard deviation of six hours. Suppose we select a random sample of 144 current students. What is the probability that the mean of this sample is less than 19.25 hours? Select one: a. 0.8664 b. 0.0181 c. 0.4332 d. 0.0668 Question 24 Correct 5.00 points out of 5.00 Flag question Question text The tread life of tires mounted on light-duty trucks follows the normal probability distribution with a population mean of 60,000 miles and a population standard deviation of 4,000 miles. Suppose we select a sample of 40 tires and use a simulator to determine the tread life. What is the likelihood of finding that the sample mean is between 59,050 and 60,950? Select one: a. 0.4332 b. 0.8664 c. 0.9332 d. 0.5668 Question 25 Correct 5.00 points out of 5.00Flag question Question text The Office of Student Services at a large western state university maintains information on the study habits of its full-time students. Their studies indicate that the mean amount of time undergraduate students study per week is 20 hours. The hours studied follows the normal distribution with a population standard deviation of seven hours. Suppose we select a random sample of 190 current students. What is the probability that the mean of this sample is between 19.25 hours and 21.0 hours? Select one: a. 0.9512 b. 0.0191 c. 0.9057 d. 0.1017