Consider the follow set of ?=5 (?,?) pairs:
? 20 25 26 30 35
? 21 30 35 31 37
NOTE: SXX = 126.8, SXY = 116.2, SYY = 152.8, ?¯ = 27.2, and ?¯ = 30.8. Compute the sample correlation correct to three decimal places of accuracy.
Correlation = ?=
please rate if it is
helpful
Consider the follow set of ?=5 (?,?) pairs: ? 20 25 26 30 35 ? 21...
Consider the follow set of ?=5 (?,?)(x,y) pairs: ?x 20 25 26 30 35 ?y 21 30 35 31 40 NOTE: SXX = 126.8, SXY = 139.6, SYY = 197.2, ?¯x¯ = 27.2, and ?¯y¯ = 31.4. Compute the sample correlation correct to three decimal places of accuracy. Correlation = ?=
Problem 1. (16 points) Consider the follow set of n = 5(x, y) pairs: x 2025 26 30 35 y 21 30 35 31 40 NOTE: SXX = 126.8, SXY = 139.6, SYY = 197.2, X = 27.2, and y = 31.4. Compute the sample correlation correct to three decimal places of accuracy. Correlation ==
Problem 3. (16 points) Find the Z-score for a normal measurement that satisfies each of the following statements. (a) The point z with 11 percent of the observations falling below it. Z= (b) The closest point z with 44 percent of the observations falling above it. Note: You can earn partial credit on this problem. preview answers Problem 4. (17 points) A random sample of n = 80 in-coming college freshmen showed that 32 were planning to bring a car...
Consider the following small data set Subject x y 1 14 30 2 15 21 3 15 25 4 3 19 5 6 31 Find the linear correlation coefficient. r =
Consider a sample with data values of 24, 28, 26, 15, 30, 34, 25, and 28. Compute the range. Compute the interquartile range. Compute the sample variance. (Round your answer to two decimal places.) Compute the sample standard deviation. (Round your answer to two decimal places.)
Data of BMI: 25 25 26 27 28 30 30 31 32 35 35 38 10) Calculate the standard deviation, variance, and the z-score of someone with a BMI at 21. 11) Is this z-score unusually high or low? (If yes, specify which one). 12) Identify the 5-number summary below 13) Calculate the IQR 14) Identify any outliers 15) Draw a boxplot of your data (modified for outliers) 16) Write a sentence describing the shape of the distribution (skewed or...
33 46 48 21 30 32 10 31 20 29 A survey of 25 randomly selected customers found the ages shown (in years). The mean is 31.76 years and the standard deviation is 10.37 years. a) Construct a 98 % confidence interval for the mean age of all customers, assuming that the assumptions and conditions for the confidence 20 38 40 35 40 interval have been met. 22 37 10 41 26 b) How large is the margin of error?...
Age Formulas 30 Sample size 47 38 27 Sample mean (2 decimals) 31.51 =AVERAGE(A:A) 35 26 Sample Standard Deviation (4 decimals) 4.1852 =STDEV.S(A:A) 36 29 Hypothesized Mean 32 34 33 Test Statistic (3 decimals) -0.802 =(D4-D8)/(D6/SQRT(D2)) 33 29 Degrees of Freedom 46 =D2-1 31 40 p-value (3 decimals) need this need this 25 35 Level of Significance (Alpha) 0.05 32 27 Reject Null Hypothesis? #N/A 31 36 34 34 32 31 31 32 30 39 25 29 31 37 37...
Consider a sample with data values of 26, 24, 21, 16, 31, 33, 29, and 24. Compute the 20th, 25th, 65th, and 75th percentiles. 20th percentile Correct: Your answer is correct. 25th percentile Incorrect: Your answer is incorrect. 65th percentile Incorrect: Your answer is incorrect. 75th percentile Incorrect: Your answer is incorrect.
It is believed that the average age students is 26. Using a 0.05 level of significance, should the findings of the Class Survey support the belief that the average age is 26. The population standard deviation is 6.5. data set:(age) 31 30 21 20 44 43 23 25 30 28 19 21 21 37 26 20 19 22 28 40 20 48 19 20 36 20 20 19 19 21 47 19 21 19 17 19 20 20 32 23...