I would like some assistance with the following probability questions

29. The average salary in Company A is $8000. The average salary in Company B is $7000. If an employee having a $7000 in Company B, leaves the company and joint Company A with a new salary of $8000, what are the effects on the mean and the standard deviation of the employees at Company A? Mean Standard Deviation a) Increased Increased b) Unchanged Increased c) Unchanged Decreased d) Decreased Unchanged 730. The scores of male (M) and female (F) students on an exam are displayed in the following boxplots. $0 10 50 $0 70 EU 90 L00 Which of the following statements is true? 3.) Approximately 75% of the males scored above 82. b) The median ofthe male students is about 66. c) The scores of the males have a higher variability than the scores of the females. (1) About 25% of the females scored above 72. e) The maximum score for the females is more than the maximum score for the males. USE THE FOLLOWING TO ANSWER QUESTIONS 47 - 51: Match each of the following with the SINGLE choice that best describes the given situation. Each answer choice may be used once, more than once, or not at all. A B C HOWAA-O - N N-ACOINWA to D E 47. Which graph shows you data in which the mean is less than the median? 48. Which graph clearly shows the 25th percentile?49. Which graph should be used only for categorical data? 10 J'E'C'ONr1 005: Introductory Statistics Mid Semester #1! Review Packet Version 2 50. Which graph has a distribution that is similar to the distribution in graph D? (Do not choose D as your answer!) 51. Which graph shows a distribution that is skewed right? USE THE FOLLOWING TO ANSWER QUESTIONS 52 AND 53: The table below shows the lifetimes (in minutes) of a sample of 30 AA batteries. Battery Life (in minutes) Number of Batteries 360-369 2 370-379 380-389 390-399 400409 410-419 420429 43 0-439 l'WLM'J 52. The mode of this dataset is: a) 394.5 minutes. b) 396.6 minutes. c) 399.0 minutes. d) 399.5 minutes. 53. The median of this dataset is: a) 389.5 minutes. b) 394.5 minutes. c) 396.6 minutes. d) 399.5 minutes. 54. Twenty-ve students were registered for a 2-year diploma programme at the [J W I. At the end of the programme, the principal conducted a survey to nd out how many of the students took vacations within particular time periods (in months) after they started the programme. The results are displayed in the table below. Time (months) 1 - 4 S - 8 9-12 1316 17-30 21-24 Frequency 4 9 2 l The mean length of time (in months) of vacations is a) 5.10. b) 8.00. c) 8.75. d) 9.33. e) 12.00. USE THE FOLLOWING TO ANSWER QUESTIONS 55 57; Match each of the following with the SINGLE choice that best describes the given situation. Each answer choice may be used once, more than once, or not at all. -E- mlllc Assuming that all the scales are the same, determine: 55. Which graph shows the dataset with the smallest IQR? 56. Which graph shows the dataset with the largest range? 57. Which graph shows the dataset with the highest median