Question

At least one of the answers above is NOT correct. 2 of the questions remain unanswered. (1 point) Archeologists have discovered a sample of ancient Egyptian skulls from 150 A.C. A sample of 5 Egyptian skull breadths (in mm) from 150 A.C. is show below: Skull breadths Sample: 132, 135, 137, 135, 135 Part 1: Calculate the mean and standard deviation for for the data set. Round the mean to 2 decimal places, and the standard deviation to 4 decimal places 150 A.C. skull breadths mean: 134.8 150 A.C. skull breadths standard deviation: 1.7889 Part 2: Using your answers from part 1 and the formula for a 95% confidence interval as presented in lecture, fill in the blanks with the appropriate values for this problem for calculating the confidence interval below. To enter V where x is any number, type sqrt(x). For example, 2 should be written as sqrt(2). 150 A.C. skull breadths: 1.7888 1.7888 134.8 2.7765 to 134.8 + 2.7765 sqrt(5) sqrt(5) Part 3
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Answer 1

Skull breadths sample. 132, 135, 137, 135, 135 n=5 Mean (x)= 132+ 135 +137+ 135 +135 = 134.8 5 :. skull breadths mean (*) (Z) = 134.8 Variance = Elx: )2 (132-1344.8) + +(3 35–134.013 - i 5-1 ; Variance 3.2. 53.2 ;. Standard deviation (o)= Variance = ;. Standard deviation () = 1.7889 Formla for 95% Confidence Interval for mear. XI 2012 to *+ Zala o to sin for 95% c- 2412 - 1.96. 134.8 - (1.96) 1.7889 sqrt(5) to 134.8 +(1-46) 1-7889 sqrt(5) banned with canner