C. Let x1,.,X20 be a random sample of size 20 from a normal distribution N(H, o?). Let the obser value of sample mean be x = 81.2 and the sample variance be S? = 26.5. ....

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C. Let x,,., x20 be a random sample of size 20 from a normal distribution N(u, o2). Let the observed
value of sample mean be i = 81.2 and the sample variance be S? = 26.5.
1. *
1. The 90% confidence interval for u is (79.158, 83.242).
True
False
2. *
2. The length L of interval (79.158,83.242) is L = 3.84.
True
False
Transcribed Image Text:Q1:C C. Let x,,., x20 be a random sample of size 20 from a normal distribution N(u, o2). Let the observed value of sample mean be i = 81.2 and the sample variance be S? = 26.5. 1. * 1. The 90% confidence interval for u is (79.158, 83.242). True False 2. * 2. The length L of interval (79.158,83.242) is L = 3.84. True False
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