please answer 41-45

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41) A couple decides to join a gym and take a fitness class. The wife is an avid statistician and decides to collect data on the ages of people who take this class. She organizes the data in the table below: Age 19 20 21 22 25 26 30 35 40 Count 2 7 3 5 2 What is true about the median age of people in the fitness class? (A) It must be 22 (B) It must be 25 (C) It is better 22 and 25 (D) This cannot be determined from a frequency table (E) This cannot be determined because the distribution is not normal 42) You score on the SAT is at the 65" percentile. You know that your score lies (A) below the first quartile (B) between the first quartile and the median (C) between the median and the third quartile (D) above the third quartile (E) You cannot determine this since the percentiles only apply to a normal distribution43) Wlnch of the following statements about the standard deviation is true? {A} The standard deviation is always smaller than the variance. (E) The standard deviation is always larger than the variance. {C } The standard deviation is negative when all the sample data are negative. {D} The standard deviation is zero when all the sample data are the same. {E} The standard deviation is always smaller than the IQR. 44) You gather data on the number of siblings the students at your school have. Your distribution is non-normal, and you convert all the data values into z-sc ores. 'Which of the following is a true statement\".I {A} The standard deviation of the zscores will be 1. (B) The standard deviation of the zscores will be greater than one since the original data is non normal. {C} We cannot determine the standard deviation of the zscores since the original data is non- normal. {D} The standard deviation of the z-scores will be equal to the standard deviation of the data values. {E} The standard deviation of the zscores will be less than one since the original data is non normal. 45) 1When posting a "sele" {a picture of yourself) to social media, some people take multiple photos of themselves before finding one that they like to post. A study was done to observe how many photos a person would talce of themselves before finding one to post on social media. They found that 25% of people would talce over 21 seles. If the standard deviation was 3 .3 selfies, what is the mean number of seles taken before a person will post to social media\".I (A) 15.? (a) 15.3 {c} its {o} 119 {a} 1s.4