The following data give the annual salaries (in thousand dollars) of 20 randomly selected health care workers. 50

72

57

38

45

65

37

51

35

62

74

40

68

43

77

61

58

54

65

59

a. Calculate the values of the three quartiles and the interquartile range.
b. Find the approximate value of the 30th percentile.
c. Calculate the percentile rank of 61.

company a

step-by-step explanation:

using the linear regression models , it is found that company a   pays about $14 more. but using the same regression (linear) company b pays about $10 more.

so company a pays more than b

x = 2

step-by-step explanation:

if sr parallel to ba then the sides bc and ac are in proportion, that is

= ← substitute values

= ( cross- multiply )

27x = 6(4x + 1)

27x = 24x + 6 ( subtract 24x from both sides )

3x = 6 ( divide both sides by 3 )

x = 2

  answer:

  write 548 as 500 + 40 + 8. multiply each addend by 5. then add the three products to get 2,740.