In a public health study, a histogram was plotted showing the number of cigarettes smoked per day by each subject, as shown below. The numbers on top of each bar represent its heights. You may assume that the values are spread uniformly across each interval. What is the first quartile (or the 25 percentile) of the values? per cigarette % N r 40 cigarettes (1.5) 20 cigarettes (3.5) O 10 between 22 and 23 cigarettes between 36 and 37 cigarettes between 12 and 13 cigarettes (1.5) 40 (0.5) 20 Number of cigarettes 80

Q: The administration at Warmfuzzy University gave a 7-item questionnaire to a representative sample of…

A: N is the total number of observations.∑X is the summation of the total observations.

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A: The frequency of a class or observation is the number of values corresponding to it. The relative…

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A:

Q: In a public health study, a histogram was plotted showing the number of cigarettes smoked per day by…

A: Quartiles are numbers that divide the whole data set into four parts.

Q: G iven:  mean =85    s=12     n =3500 What % of scores are between 97 to 109 ?

A:

Q: The scores on the Wechsler Adult Intelligence Scale are approximately Normal, with  = 100 and  = 11.…

A: The scores on the Wechsler Adult Intelligence Scale are approximately Normal

Q: What percent of the data fall below the 1st quartile?   1.  0% 2. 25% 3. 50% 4. 75% 5. 100%

A: The first quartile is denoted by Q1 and this is the median of lower half of the data set.

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A: We have given that the shaded area correspond to z = -0.90.

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A: Given

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Q: O a bar chart

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A:

Q: ep 5 of 5: Find the percentage of students that scored higher than 80.5. Round your answer to the…

A: Given:  Histogram of score with corresponding frequency Score:     70.5-75.5, 75.5-80.5, 80.5-85.5,…

Q: In a public health study, a histogram was plotted showing the number of cigarettes smoked per day by…

A: A histogram showing cigarettes smoked by subjects is given. The first quartile or 25 percentile is…

Q: What percent of the observations in a distribution are LESS than the third quartile? O a. 25% O b.…

A: To find :  Distribution  are less than the third  quartile.

Q: For the 8 test scores shown, which score corresponds to a percentile rank of 62.5? 7 31 47 52 54 55…

A: Given that.Sample size The data is given in ascending order: 7  31  47  52  54  55  67  77To find a…

Q: Calculate the 75th percentile of the data shown x 1.1 4.5 7.2 8 12.4 15.7 18.9 25.4 26.5 27.3 28.6…

A: We have to find a value such that 75% of the values are smaller than that value.Here,the total…

Q: x Y 5 1 4 1 3 2 2 3 1 4

A: The median is the middle number is an ordered set of data. Add 1, 1, 2, 3 and 4 is the values of Y.…

Q: Calculate the 75th percentile of the data shown

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Q: The percentile is the:   Question 5 options:   same thing as a percentage.   percentage of scores…

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Q: Suppose you measure many many heights and get the following histograms Histogram of Height X Top…

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Q: technician needs to change the oil in a car is uniformly distributed between 11 and 21 minutes. Let…

A: It is an important part of statistics. It is widely used.

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A: (b)   Identify the conditions that are necessary for the calculations.   The correct option is…

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A: Given information: Sample size of the survey of fatal accidents n=100 Number of accidents that were…

Q: In a public health study, a histogram was plotted showing the number of cigarettes smoked per day by…

A: Histogram is a graphical representation of the continuous data.