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1. The National Center for Health Statistics reports the following age breakdown of deaths in the United States during 2006. Source: The New York Times Almanac 2009, p. 392.
Age (Years) Number of Deaths (Thousands)
Construct a frequency distribution and a histogram for these data.
2. The accompanying data describe the hourly wage rates (dollars per hour) for 30 employees of an electron- ics firm:
under 15
39.80
22.66
24.39
17.31
21.02
21.61
20.97
18.58
16.61
15-under 25
34.23
19.74
21.57
20.56
22.16
20.16
18.97
22.64
19.62
25-under 35
41.93
22.05
22.03
17.09
24.60
23.82
17.80
16.28
19.34
35-under 45
84.79
22.22
19.49
22.27
18.20
19.29
20.43
45-under 55 183.53
55-under 65 275.30
65-under 75 398.36
75 or over 1389.83
Identify the following for the 45-under 55 class:
(a) frequency, (b) upper and lower limits, (c) width, and (d) midpoint.
a blood test indicates the presence of a particular disease 98 of the time when the disease is actually present. the
standard deviation= 2.5 ounces. Which of the following is true about the sampling distribution of the sample mean if a sample of size 15 is selected?
in womens biathlon sprint the participants ski 7.5 km. after 2.5 km they shoot 5 shots on a target while lying down and
What are different methods of graphical representation of data? Explain them. Distinguish Histogram and Histogram clearly with illustrations.
You need to estimate the mean number of travel days per year for outside salespeople. The mean of a small pilot study was 150 days, with a standard deviation of 42 days.
do students at various universities differ in how sociable they are? twenty-five students were randomly selected from
1 what was the mean quantity ordered?a. 48.0 b. 52.7 c. 10 d. 74.52 what percentage of orders is for quantity
Today, around the world, Churchill"s name is revered. There are Winston Churchill Societies in most countries. Adolf Hitler and Nazi Germany. Which of these men is a hero? Winston Churchill or Neville Chamberlain?
Estimate the proportion of customers that will be using food stamps at his store. How large a sample is required to estimate the true proportion to within 3% with 98% confidence?
Suppose the assembly times follow normal distribution. Find out z values for 29 and 34 hours. What percent of garages take between 32 hours and 34 hours to erect?
Evaluate the performance of the judges.
I have a lower spec limit of -0.008 and an uppers spec limit of 0.008. The mean of the data is -0.00306 and standard deviation is 0.003642. What is the z-score and DPMO
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