From the list of test scores of 19 students. Find the inter-quartile range 36 45 49 53 55 56 59 61 62 65 67 72 77 80 81 85 91 94 96

Q: Using the following data: 23, 74, 18, 21, 20, 43, 56, 71, 73, 65, 34, 47, 51, 55, 56, 29 Calculate…

A: A frequency distribution is a list, table or graph that displays the frequency of various outcomes…

Q: Suppose that the mean score of a class of 32 students was 80. The 20 male students in the class had…

A: Given,The mean score of 32 students(x¯)=80The mean score of 20 male students(M)=68

Q: Calculate the 3rd quartile, 9th decile and 46th percentile o the distribution

A: Quartile is the measure that divide the data into 4 parts with 3 points. Decile is the measure that…

Q: Find 25th and 40th percentile of data 2,5,7,810,12,15,17,19,24,28,32,34,36,38,40,42,44,47,49

A:

Q: Based on the values of the mean and the median, decide whether the data set is skewed right, skewed…

A: Solution-:Given: Based on the values of the mean and the median decide whether the data set is…

Q: Find the mean, 80th percentile and standard deviation: 2,-3,7,5,-2,3

A: Solution-: Given data: 2,-3,7,5,-2,3 We want to find, (a) The mean=? (b) The 80th percentile=? (c)…

Q: Take 50 observations at random ranged from (117- 254). Make a grouped frequency distribution. Find…

A: We need to take a 50 observations at random ranged from (117-254). For this we can use…

Q: The test scores for a class of 219 students are computed. What is the location of the test score…

A: Here we have given that test scores for a class of 219 students i.e. => n=219

Q: Take 50 observations at random ranged from (117- 254). Make a grouped frequency distribution. Find…

A: We draw a 50 random numbers between 117 to 254 using command #RANDBETWEEN() in excel. 195 158…

Q: Marks 3. 4. 7 Frequency y y+1 4 1 The table gives the frequency distribution of marks obtained by a…

A: Given,iMarks(m1)Frequency(fi)13524y35y+1469574681                   Total = 5 + y + 1 + 9 + 4 + 1=…

Q: Mrs. Cruz is a Math teacher; she gives a 60 item test for remedial class. The scores of 20 students…

A: Deciles divide the ordered data into 10 equal parts.   There are 20 values in the data. So, n = 20.…

Q: Between the mean and median, determine which would be a better estimator given that a sample…

A: The sample mean is, x¯=∑xn=3+8+26+14+125=635=12.6 The data in the ascending order is 3, 8, 12, 14,…

Q: Determine whether the data from the following statements is nominal, ordinal, interval or ratio.…

A: We need to identify suitable Measurement scale for given data

Q: In a distribution of scores, the mean is 12, the median is 8 and the mode is 4. Describe the shape…

A: A distribution is said to be positively skewed / right skewed if Mode > Median > Mean  and…

Q: In the ordered data : 20 , a , 25,30,40 , b , 50 if the mean is 34 , and the first quartile is 24 ,…

A: Given data;  ordered data : 20 , a ,25,30,40 , b ,50  mean  = 34 , first quartile(Q1) = 2 Number of…

Q: If a person’s z score equals -2.02, what is their percentile?

A: Given problem Given that   Given Person's z score =  -2.02 Using the Standard Normal Table ( Z Table…

Q: Here are the scores of 14 students on a geography test. 60, 67, 71, 75, 76, 78, 80, 80, 83, 90, 90,…

A: 60,67,71,75,76,78,80,80,83,90,90,92,93,94sample size(n) = 14The data is ordered from least to…

Q: Your instructor has the Mid-Term examination grades. He told you that the 25th percentile is 51 and…

A: Given that, Your instructor has the Mid-Term examination grades. He told you that the 25th…

Q: 25% of pitchers are left-handed. a survey of 80 pitchers showed 27 are left-handed. find the point…

A: Solution:Point estimate: The population parameter which is estimated by using sample statistic is…

Q: Leon has just gone grocery shopping. The mean cost for each item in his bag was $3.62. He bought a…

A: It is an important part of statistics. It is widely used.

Q: find find 5th deciles of the data  15,45,78,56,23,28,15,46,75,89,99,68,36,28,73

A:

Q: On the right are ratings for passers in a football league. Find the three quartiles for the ratings

A: The first or lower quartile is given by, Q1 ={ (n+1)/4 } th term In the given data, n= 10 Q1 =…

Q: Calculate First and Third Quartiles for the data: 210, 179, 224, 317, 189, 185, 191, 217, 225, 188,…

A: For the provided data, the first and third quartiles are;

Q: Determine the range of the following data: 13,32,31,21,24,36,43,67,64,58,62,63,72,83,52,69,81 ,77

A: arrange data in accending order 13, 21, 24, 31, 32, 36, 43, 52, 58, 62, 63, 64, 67, 69, 72, 77, 81,…

Q: The mean of 14 numbers is 49. Removing one of the numbers causes the mean to decrease to 43. What…

A: given data:mean =49n=14 Removing one of the numbers causes the mean to decrease to 43new total…

Q: he median is measure of variation true or false

A: Central tendency is the descriptive statistic, which gives summary in a single value.The different…

Q: Twenty students took a 20-item exam. Ten students scored 12, five students scored 15, three scored…

A: Twenty students took a 20-item exam; n=20 Ten students scored 12 Five students scored 15 Three…

Q: The 10 members of the swim team completed the following numbers of laps at today's practice. 77, 78,…

A: Given: n = 10 Formula Used: Q1 = n+14thterm Q3 = 3n+14thterm

Q: The third quartile of the data: 22,17,10,35,40,18,9 is equal to

A: we know that  It is the median of uppar values of data. Uppar values mean the data values which are…

Q: What is the p value if the mean is 98.6, n=7, t= -2.114?

A: The P-value is the probability that provides strong evidence in favor of the alternative hypothesis.…

Q: Find the z-score that corresponds to the 63rd percentile

A: we have to find the Z-score that corresponds tothe 63rd percentile.

Q: Find the deviations from the mean for the set of data: 26, 29, 22, 24, 24. Score 26 29 22 24 24…

A: Given Data is, 26,29,22,24,24 mean,x¯ =26+29+22+24+245=25

Q: Suppose that the mean score of a class of 33 students was 80. The 19 male students in the class had…

A:

Q: The percentile gives an indication of the relative position of the scores. True or False?

A: Partition values are the values which divide the series into a number of equal parts.  * Three…

Q: The measure of skewness for a certain distribution is lower and upper quartiles are 44.1 and 56.6…

A: Solution:

Q: Find the percentile rank of a test score of 76 for the data set 70,73,68,83,78,80,89,88,65

A: Solution-: Given data:  70,73,68,83,78,80,89,88,65 We find percentile rank of a test score of 76=?

Q: Describe about Which Level of Significance to choose.

A: The significance level should be selected with close consideration of key factors such as sample…

Q: Mina is waiting in line at the Department of Motor Vehicles (DMV). Her wait time is in the 85th…

A: It is clearly given in statement that at Department of Motor Vehicles waiting line is Mina wait time…

Q: Ten students take a 10-point test. The mean score is 8. Could the median be 10? Could the median be…

A: Solution-: Ten students take a 10-point test. The mean score is 8. Could the median be 10? Could the…