Question

Ninety minutes are allowed for students to complete the multiple-choice section of a national exam.  A random...

Ninety minutes are allowed for students to complete the multiple-choice section of a national exam.  A random sample of 28 students selected from the students at a large high school took a practice exam, and the time (in minutes) that it took each student to complete the multiple-choice section was recorded.  The times are given below.

Time to Complete the Multiple Choice Section

58

76

74

80

88

74

65

97

66

95

77

63

83

73

64

71

60

68

70

63

71

57

75

74

52

71

81

82

Is there evidence at the 5% level of significance that the mean time to complete the multiple-choice sections for students at this school is less than 76 minutes?

Math   Statistics-And-Probability   
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