Find the standard deviation for the given the original data. sample data. Round

Question

Find the standard deviation for the given the original data. sample data. Round your answer to one more decimal place than is present in data cores an the anganic chemistrtm ae a olon 55, 71. 41, 82 57, 25, 66 81 A)7.3 Find ) 17 D) 20.2 the variance for the given dat 2) 18 16 12 2 11 . Round your answer to one more decimal place than the original data. A) 30.6 rovide an appropriate response. B) 38.2 C) 672 D) 38.1 3) Find the A) z =-3.37 or the value 60, when the mean is 8o and the standard deviation is 8 B) z -060 C)z 06o 4) The percentage tage of measurements that are above the 39th percentile is 4) measurements A) 71% C) cannot determine B) 61% D) 39% care issues are receiving much attention in both academic and political arenas. A sociologist 5) recently conducted a survey of senior citizens whose net worth is too high to qualify for overnment health care but who have no private health insurance. The ages of 25 uninsured senior citizens were as follows: 71 76 69 79 89 77 64 92 68 93 72 95 79 65 84 66 71 84 73 76 63 90 78 67 85 Find Q1 of the data. D) 68.5 C) 69 B) 76.5 A) 68 6) The following data are the yields, in bushels, of hay from a farmer's last 10 years 375, 210, 150, 147, 429, 189, 320, 580, 407, 180 Find the IQR. D) 253 C) 227 B) 279 A) 265 The cholesterol levels (in milligrams per deciliter) of 30 adults are listed below. Draw a boxplot that represents the data. 154 156 165 165 170 171 172 180 184 185 189 189 190 192 195 198 198 200 200 200 205 205 211 215 220 220 225 238 255 275

Explanation / Answer

Ans:

1)47,55,71,41,82,57,25,66,81

sample standard dviation=sqrt(2846/8)=18.9

Option C is correct.

2)

variance=152.8/5=30.6

Option A is correct.

3)mean=86,standard deviation=8

z=(x-mean)/std. dev.

z=(60-86)/8=-26/8=-3.25

Option D is correct.

4)The percentahe of meaurements above 39th percentile is 61%.

(as 39th percentile means that 39% of the meaurements are below it)

Option B is correct.

std

xi xi-58.33 (xi-58.33)^2 1 47 -11.33 128.37 2 55 -3.33 11.09 3 71 12.67 160.53 4 41 -17.33 300.33 5 82 23.67 560.27 6 57 -1.33 1.77 7 25 -33.33 1110.89 8 66 7.67 58.83 9 81 22.67 513.93 Total= 525 2846.00 mean= 58.33 std dev= 18.9

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