(b) For a set of 100 observations, the sum of deviations from 4 is -11, and the sum of the squares of these deviations is 257. Find the coefficient of variation.

Q: The profit for a production process is equal to $2,000 minus two times the number of units produced.…

A: Consider X is the number of units produced Here, Y = 2000-2X It is known that E(X) = 500, Var (X) =…

Q: A basketball measured the heights of his players and found them to be: 173cm, 177 cm, 185cm, 183cm,…

A:

Q: tudent obtained the mean of 58 observations as 48. It was later found that one observation was…

A: Given data, n=58 The mean for 58 observations is 48 x=∑xn48=∑x58∑x=2784

Q: For a raw data, the arithmetic mean is 24 and sum of the observations (values) is 840. One of the…

A: Here given that  Sum of observation is 840Mean is 24

Q: The mean of five positive numbers is 4.When another number is added, the mean becomes 8.Find the…

A: Here given that the mean of five positive numbers is 4. Therefore the total sum of numbers is…

Q: A restaurant server claims that 49% of the time he leaves candy with the bill, the customer "tips…

A: Given : n = 5 p = 0.49

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A:

Q: the average score of 10 students is 85. what will be the mean if another student will take the test…

A: From the provided information, Average score of 10 students = 85

Q: Suppose you have information about average heights of a random sample of airline passengers. The…

A: Given: The mode is 68 inches, the median is 69 inches, and the mean is 65 inches. We need to convert…

Q: The mean and S.D. of income of 50 men are Rs. 3200 and Rs. 525 respectively The same for 40 women…

A: Formula for S.D for combined group: σ12=n1(σ12+d12)+n2(σ22+d22)n1+n2          Combined mean is,…

Q: Find the variance of the number of storms in August.

A: X: Number of thunderstorms in August.

Q: John calculated r -.44 for a set of n 10 pairs of values that represent the number of absences from…

A: Given that r = -0.44 midterm exam score ( y )   number of absences from class (x)

Q: After six biology tests, Ruben has a mean score of 76. What score does Ruben need on the next test…

A: After 6 biology tests :  Mean = 76  After next test : ( biology test will be 7 now )  Mean =78…

Q: What is the range of Joey’s first 14 quiz grades? What is the range of Joey’s quiz grades after his…

A: a) Range of first 14 quiz Lowest value=74 Highest value=98   Range=Highest value-Lowest Value…

Q: Create a Scatterplot of y against percentage of Pell Grant recipients among freshmen.

A: The data for 2016 graduation rate and full-time undergraduate student to faculty ratio is given as-…

Q: A cardiologist wants to determine whether there is a change in blood pressure when her patients are…

A: Given : n=45 , x(sample mean of the differences ) = -2 mmHg ,  s(sample standard deviation) = 0.4…

Q: Suppose you have information about average heights of a random sample of airline passengers. The…

A:

Q: Which one measure of variation would you report for the variable SEX (1=male, 2=female )

A: Variance is a single statistic that measures the spread or variation of a data set.

Q: Suppose you have information about average heights of a random sample of airline passengers. The…

A: Given Information: Mode=68 inchesMedian=69 inchesMean=69 inches To find out the values of the mode,…

Q: The mean weight of 150 students in a certain class is 60 kg. The mean weight of boys in the class is…

A:

Q: Jose has scored  79 ,  84 , and  85  on his previous three tests. What score does he need on…

A: Step 1:. The formula for average is:Average=Number of scoresSum of all scores​ Let's apply this…

Q: The mean weight of 150 students in a class is 60 kg. The mean weight of boys in the class is 70 kg.…

A:

Q: Two variable are found to have a strong negative linear correlation. Pick the regression equation…

A: We know that  Correlation coefficients:- The correlation coefficients measures the direction &…

Q: Joselyn hopes to receive a grade of B or better in her statistics class. Currently she has scored…

A: Mean= sum of total obervation/ total no. Of observation

Q: Find the relationship between the two variables in the given data. X 1 2 3 4 20 16 12 8 If one…

A:

Q: A mathematics professor lost a test paper belonging to one of her students. She remembered that the…

A: The mean score for the class of 20 was 81. Thus, total number of her students was n=20.…

Q: I finished first in the high jump and third in the pole vault. determine whether the data described…

A: Nominal Data- Take more than 2 values but these values are not ordered –there is no natural ordering…

Q: 1. The list gives the year of birth for each state governor in the US in 2007. Choose intervals and…

A: Frequency Distribution: In Statistical theory, a frequency distribution is a tabular, listed or…

Q: * 2.4.5.6-8-17 11 17 20 24 32 Xị 3 5 9 3 fi 1. 4) 5n 00

A: As per our guidelines we are suppose to answer only one question1)Given data set is…