Mrs. Rodrigues wants to compare the spread of the test scores of her two biology classes. Which statistic should she use?
The number of cars sold at a dealership over several weeks is given. 14 , 23 , 31 , 29 , 33 What is the standard deviation for this set of population data? Standard deviation: σ=sqrt(((x_1−μ)^2+(x_2−μ)^2+...+(x_N−μ)^2)/(N))
A set of data has a mean of 12 and a standard deviation of 3 A data point of the set has a z -score of 1 point 3 What does a z -score of 1 point 3 mean?
The test scores of a geometry class are given. 90 , 75 , 72 , 88 , 85 The teacher wants to find the variance for the class population. What is the value of the numerator of the calculation of the variance? Variance: σ^2=((x_1−μ)^2+(x_2−μ)^2+...+(x_N−μ)^2)/(N)
The weekly salaries of a sample of employees at the local bank are given in the table. Employee Weekly Salary Anja 245 dollars Raz 300 dollars Natalie 325 dollars Mic 465 dollars Paul 100 dollars What is the variance for the data? Variance: s^2=((x_1−x―)^2+(x_2−x―)^2+...+(x_n−x―)^2)/(n−1)
Yuri computes the mean and standard deviation for the sample data set 12 , 14 , 9 , and 21 He finds the mean is 14 Yuri's Work s=sqrt(((12−14)^2+(14−14)^2+(9−14)^2+(21−14)^2)/(4)) is equal to square root of the fraction with numerator negative 2 squared plus 0 squared plus negative 5 squared plus 7 squared and denominator 4 end root is equal to square root of the fraction with numerator 4 plus 0 plus 25 plus 49 and denominator 4 end root is equal to square root of 78 fourths is equal to square root of 19 point 5 What is the first error he made in computing the standard deviation?
The monthly mean salaries and standard deviations of four college students are given. Student Mean Standard Deviation Clarissa 345 dollars 12 point 5 3 Abi 598 dollars 8 point 9 9 Kaila 812 dollars 15 point 2 9 Shenika 208 dollars 7 point 6 7 Which statement must be true?
Fiona recorded the number of miles she biked each day last week as shown. 4 , 7 , 4 , 10 , 5 The mean is given by mu is equal to 6 Which equation shows the variance for the number of miles Fiona biked last week?
A scientist collected two sample sets of snowfall data. Which statistic should he use to compare the spread of the two sets of data?
Did you find these answers helpful?