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Homework 2 (3)

Homework 2 (3) - survey was conducted to determine how...

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Unformatted text preview: survey was conducted to determine how people rated the quality of programming available on television. Respondents were asked to rate the overall quality from 0 (no quality at al I) to 100 (extremely good quality). The stem ~and-leaf display of the data is shown below. Stern Leaves QQMP‘C §\Z€2 : 2g 26 03478999 0112345 12566 17 I "' 3 3. ZS t 04“ 12) What percentage of the respondents rated overall television quality as very good (regarded as ratings of 12) JC 80 d above)? 6*, B) 1% C) 3% D) 32% E) 12% 13) identify the minimum quality rating. : 13) C IOQh-lwu'lb A) 2 B) 26 D) 0 14) identify the maximum quality rating. E 14) ( f A) 100 B) 3 D) 49 15) What is the mode rating? A) 9 G“: C) 93 o) 51 —— 16) The variable ”quality“ is 16) a B) Categorical :.4 Provide an appropriate response. 17) SAT verbal scores are normally distributed with a mean of 433 and a standard deviation of 90. Use the 17) z S Em -irical Rule to determine what percent of the scores lie between 433 and 523. a) -.'. B) 47.5% C) 49.9% D) 51% E) 68% 18),The mean is less than the median . . . . .. ‘ . Amer WWW. iii-med tau-em C) when the data is skewed to the right D) when the data is symmetric 19) According to the Center for Disease Control growth charts of 2000, the weight at birth of males has a mean 19) 5 value of 3.53 kg with a standard deviation of 0.58. For a male child weighing 2.75 kg at birth, what is the corresponding z-score?( ) dc.gov_/growthchartsl) A) 0.78 M83134: C) 1.34 o) -013 _ 2;(2.76—- 6S6) '1 5%: —{ .391- 20) The normal monthly preCIpitation (in inches) for September is listed for 20 different US cities. Find the 20) E mean of the data. 3.5 1.6 2.4 3.7 4.1 3.9 1.0 3.6 4.2 3.4 3.7 2.2 1.5 4.2 3.4 2.7 0.4 3.7 2.0 3.6 -J- (53%.. With» )t _ 2E1; : -13 . ZQ‘? A) 3.09 in. B) 2.80 in. C) 3.27 in. D) 2.70 in. G 2.9“:13 ...
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