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

Straighterline MAT150 Business Statistics Graded MIDTERM Exam (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 6.67 points out of 6.67 Flag question Question text Which word is not part of the definition of descriptive statistics? Select one: a. Presenting b. Predicting c. Summarizing d. Organizing Question 2 Correct 6.67 points out of 6.67 Flag question Question text What type of variable is the number of gallons of gasoline pumped by a filling station during a day? Select one: a. Discrete b. Attribute c. Continuousd. Qualitative Question 3 Correct 6.67 points out of 6.67 Flag question Question text When TV advertisements report that "2 out of 3 dentists surveyed indicated they would recommend Brand X toothpaste to their patients," an informed consumer may question the conclusion because Select one: a. the sample was only 5 dentists. b. the sample of dentists is clearly explained. c. the advertisement does not include the total number of dentists surveyed. d. the conclusion is not illustrated with a graph. Question 4 Correct 6.67 points out of 6.67 Flag question Question text In the U.S. Midwest states of Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South Dakota, and Wisconsin, the number of persons who died from a pandemic virus were (in thousands) 14.4, 6.5, 2.9, 1.8, 10.6, 4.0, 4.3, 1.3, 1.0, 7.1, 1.1, 4.0, respectively. The mean, or average number of deaths was Select one: a. about 4. b. about 13.4. c. about 4.9. d. about 15.7. e. about 3.1. Question 5Correct 6.67 points out of 6.67 Flag question Question text A sample of small bottles and their contents has the following weights (in grams): 4, 2, 5, 4, 5, 2, and 6. What is the sample variance of bottle weight? Select one: a. 4.80 b. 2.33 c. 1.96 d. 6.92 Question 6 Correct 6.67 points out of 6.67 Flag question Question text A dot plot shows ____________. Select one: a. the general shape of a distribution b. the interquartile range c. the mean, median, and mode d. the relationship between two variables Question 7 Correct 6.67 points out of 6.67 Flag questionQuestion text Outliers are clearly presented in a _____________. Select one: a. box plot b. stem-and-leaf display c. contingency table d. dot plot Question 8 Correct 6.67 points out of 6.67 Flag question Question text A box plot shows ___________. Select one: a. the 10th and 90th percentiles of a distribution b. the mean and variance c. the deciles of a distribution d. the relative symmetry of a distribution for a set of data Question 9 Correct 6.67 points out of 6.67 Flag question Question text Quartiles divide a distribution into four equal parts. Select one: True False Question 10Correct 6.67 points out of 6.67 Flag question Question text To locate the percentile for a given observation in a data set, the data must be ___________. Select one: a. sorted and listed from the minimum to the maximum values b. displayed in a histogram c. distributed symmetrically around the mean d. summarized in a frequency distribution Question 11 Correct 6.67 points out of 6.67 Flag question Question text If a student places in the 99th percentile on an exam, she performed better than 99% of all students who completed the exam. Her performance is similar to a statement based on a __________. Select one: a. cumulative frequency distribution b. frequency table c. histogram d. pie chart Question 12 Correct 6.67 points out of 6.67 Flag questionQuestion text If Pearson’s coefficient of skewness is equal to zero, the shape of the distribution is ________. Select one: a. positively skewed b. symmetric c. unknown d. negatively skewed Question 13 Correct 6.67 points out of 6.67 Flag question Question text A correlation coefficient of +0.08 indicates strong positive correlation. Select one: True False Question 14 Correct 6.67 points out of 6.67 Flag question Question text A correlation coefficient of −0.8 indicates strong indirect relationship. Select one: True False Question 15 Correct 6.67 points out of 6.67Flag question Question text The correlation coefficient measures the strength and direction of the relationship between two quantitative variables. Select one: True False Question 16 Correct 6.67 points out of 6.67 Flag question Question text What does the complement rule state? Select one: a. P(A) = P(A) × P(B) b. P(A) = P(A)X + P(B) c. P(A) = P(A) − P(B) d. P(A) = 1 − P(not A) Question 17 Correct 6.67 points out of 6.67 Flag question Question text If two events are independent, then their joint probability is computed with _______. Select one:a. the Bayes’ theorem b. the special rule of addition c. the general rule of multiplication d. the special rule of multiplication Question 18 Correct 6.67 points out of 6.67 Flag question Question text A study of interior designers' opinions with respect to the most desirable primary color for executive offices showed the following: Primary ColorNumber of Opinions Red 92 Orange 86 Yellow 46 Green 91 Blue 37 Indigo 46 Violet 2 What is the probability that a designer does not prefer blue? Select one: a. 1.0000 b. 0.8850 c. 0.7725 d. 0.9075 Question 19 Correct 6.67 points out of 6.67 Flag questionQuestion text When an experiment is conducted "without replacement," _______. Select one: a. the probability of two or more events is computed as a joint probability b. events are equally likely c. events are dependent d. the experiment can be illustrated with a Venn diagram Question 20 Correct 6.67 points out of 6.67 Flag question Question text The ATP men’s professional tennis tour ends with a tournament involving a first-round “round-robin” matchup of four tennis players who must play each other to determine who advances. How many total first-round matches are played with these four players? Select one: a. 8 b. 10 c. 6 d. 4 Question 21 Correct 6.67 points out of 6.67 Flag question Question text A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. What is the probability that on a randomly selected day she will have no messages? Select one:a. 0 b. 0.0067 c. 0.0335 d. It is impossible to have no messages. Question 22 Correct 6.67 points out of 6.67 Flag question Question text For the following distribution: x P(x) 0 0.130 1 0.346 2 0.346 3 0.154 4 0.026 What is the mean of the distribution? Select one: a. 2.521 b. 3.154 c. 1.604 d. 1.346 Question 23 Correct 6.67 points out of 6.67 Flag question Question textFor the following distribution. x P(x) 0 0.027 1 0.189 2 0.441 3 0.343 What is the mean of the distribution? Select one: a. 1.589 b. 0.441 c. 2.100 d. 2.603 Question 24 Correct 6.67 points out of 6.67 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 variance of the number of days absent? Select one: a. 55.52 b. 1.1616c. 1.41 d. 5.00 Question 25 Correct 6.67 points out of 6.67 Flag question Question text Consider a standard normal random variable z. What is the value of z if the area to the right of z is 0.4091? Select one: a. 0.32 b. 0.66 c. 0.23 d. 0.43 Question 26 Correct 6.67 points out of 6.67 Flag question Question text For a distribution of sample means constructed by sampling 5 items from a population of 15, ______. Select one: a. the sample size is 15 b. the standard error will be 1 c. the mean of the sample means will be 3 d. there will be 3,003 possible sample means Question 27 Correct 6.67 points out of 6.67Flag question Question text When dividing a population into subgroups so that a random sample from each subgroup can be collected, what type of sampling is used? Select one: a. Simple random sampling b. Stratified random sampling c. Cluster sampling d. Systematic sampling Question 28 Correct 6.67 points out of 6.67 Flag question Question text To study the population of consumer perceptions of new technology, sampling of the population is preferred over surveying the entire population because ______. Select one: a. we can compute z-scores b. sampling is more accurate c. sampling methods are simple d. it is quicker Question 29 Correct 6.67 points out of 6.67 Flag questionQuestion text What is the difference between a sample mean and the population mean called? Select one: a. Sampling error b. Interval estimate c. Point estimate d. Standard error of the mean Question 30 Correct 6.57 points out of 6.57 Flag question Question text Bones Brothers & Associates prepare individual tax returns. Over prior years, Bones Brothers has maintained careful records regarding the time to prepare a return. The mean time to prepare a return is 90 minutes, and the population standard deviation of this distribution is 14 minutes. Suppose 100 returns from this year are selected and analyzed regarding the preparation time. What is the standard error of the mean? Select one: a. 140 minutes b. 90 minutes c. 14 minutes d. 1.4 minutes