Author Question: The scores on a standardized test are reported by the testing agency to have a mean of 75. Based on ... (Read 101 times)

dakota nelson · **on:** Feb 14, 2020

Question 1

In a test of H0: μ = 250 against Ha: μ ≠ 250, a sample of n = 100 observations possessed mean

= 247.3 and standard deviation s = 11.4. Find and interpret the p-value for the test.

Question 2

The scores on a standardized test are reported by the testing agency to have a mean of 75. Based on his personal observations, a school guidance counselor believes the mean score is much higher. He collects the following scores from a sample of 50 randomly chosen students who took the test.

39

48

55

63

66

68

69

70

71

73

74

76

77

78

79

80

82

83

85

86

88

89

90

91

92

93

95

96

97

99

Find and interpret the p-value for the test of H0: μ = 75 against Ha: μ > 75.

T4T · **Reply #1 on:** Feb 14, 2020

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