# 2.2 Histograms, frequency polygons, and time series graphs  (Page 8/15)

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Often, cruise ships conduct all on-board transactions, with the exception of gambling, on a cashless basis. At the end of the cruise, guests pay one bill that covers all onboard transactions. Suppose that 60 single travelers and 70 couples were surveyed as to their on-board bills for a seven-day cruise from Los Angeles to the Mexican Riviera. Following is a summary of the bills for each group.

Fill in the relative frequency for each group.Construct a histogram for the singles group. Scale the x -axis by \$50 widths. Use relative frequency on the y -axis.Construct a histogram for the couples group. Scale the x -axis by \$50 widths. Use relative frequency on the y -axis.Compare the two graphs: List two similarities between the graphs. List two differences between the graphs. Overall, are the graphs more similar or different?Construct a new graph for the couples by hand. Since each couple is paying for two individuals, instead of scaling the x -axis by \$50, scale it by \$100. Use relative frequency on the y -axis.Compare the graph for the singles with the new graph for the couples: List two similarities between the graphs. Overall, are the graphs more similar or different?How did scaling the couples graph differently change the way you compared it to the singles graph?Based on the graphs, do you think that individuals spend the same amount, more or less, as singles as they do person by person as a couple? Explain why in one or two complete sentences.

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How to take a random sample of 30 observations
you can use the random function to generate 30 numbers or observation
smita
How we can calculate chi-square if observed x٫y٫z/frequency 40,30,20 Total/90
calculate chi-square if observed x,y,z frequency 40,30,20total 90
Insha
find t value,if boysN1, ،32,M1,87.43 S1square,39.40.GirlsN2,34,M2,82.58S2square,40.80 Determine whether the results are significant or insignificant
Insha
The heights of a random sample of 100 entering HRM Freshman of a certain college is 157 cm with a standard deviation of 8cm. test the data against the claim that the overall height of all entering HRM students is 160 cm. previous studies showed that
complete the question.. as data given N = 100,mean= 157 cm, std dev = 8 cm..
smita
Z=x-mu/ std dev
smita
find the mean of 25,26,23,25,45,45,58,58,50,25
add all n divide by 10 i.e 38
smita
38
hhaa
amit
1 . The “average increase” for all NASDAQ stocks is the:
STATISTICS IN PRACTICE: This is a group assignment that seeks to reveal students understanding of statistics in general and it’s practical usefulness. The following are the guidelines; 1.      Each group has to identify a natural process or activity and gather data about/from the process. 2.
The diameter of an electric cable,say, X is assumed to be continoues random variable with p.d.f f(x)=6x(1-x); ≤x≤1 a)check that f(X) is p.d.f b) determine a number b such that p(Xb)
A manufacturer estimate 3% of his output is defective. Find the probability that in a sample of 10 items (a) less than two will be defective (b) more than two will be defective.
A manufacturer estimates that 3% of his output of a small item is defective. Find the probabilities that in a sample of 10 items (a) less than two and (b) more than two items will be defective.
ISAIAH
use binomial distribution with parameter n=10, p= 0.03, q=0.97
the standard deviation of a symmetrical distribution is 7.8 . what must be the value of forth moment about the mean in order that distribution be a) leptokurtic b) mesokurtic c) platy kyrtic intrept the obtain value of a b and c
A researcher observed that four out of every ten of their products are normally defective. A total of 360 samples of the products were being tested. If the sample is normally distributed and 220 of the products were identified to be faulty, test the hypothesis that the observation of the res
false
please answer the ques"following values are obtained from life table T15=3,493,601 and e°15=44.6 then expected number of person alive at exact age 15 will be "
vinay
make it clear
Kagimu
how x minus x bar is equal to zero
When the mean (X bar) of the sample and the datapoint-in-context (X) from the same sample are the same, then it (X minus X bar) is equal to 0
Johns
e.g. mean of. sample is 3 and one of the datapoints in that sample is also 3
Johns
a numerical value used as a summary measure for a sample such as a sample mean is known as
differentiate between qualitative and quantitative variables
qualitative variables are descriptive while quantitative are numeric variables
Chisomo
please guys what is the formulas use in calculated statistics please iam new here
Dear Yunisa there are different formulas used in statistics depending on wnat you want to measure. It would be helpful if you can be more specific
LAMIN
Which of these measures are used to analyze the central tendency of data?
hello
GoDeeply
hi
Atul
mean median mode quartiles
Atul
Median
Shemmy
median
Kagimu
median
LAMIN
There are three main measures of central tendency: the mode, the median and the mean. Each of these measures describes a different indication of the typical or central value in the distribution. ... The mode is the most commonly occurring value in a distribution.
sanjay
hw about the mean and median
Kagimu
While mean is the sum of the total distribution devided by the number of values in the distribution or data set.
Shemmy
And median is the measure used to determine or analyze the central tendancy of the distribution.
Shemmy
oooooo thanks
Kagimu
what is the difference between stratified sample and cluster sample ?
Sona
Dhrub
ok...I will look into it..thanx
Sona
both mean and median are all measures of central tendency however mean indicate the average of set of quantitative data and it is used when data is normal, median indicate position thus the middle of quantitative data when arranged in ascending order and it is used when in skewed distributions
david
in cluster there is multi set of population which exist naturally then you select subjects from each set to form ur sample while in stratified there is a single set of population then u create a sub unit called strata then u select from each stratum to form ur sample. remember that u need to deploy*
david
okay ...thank you
Sona
* either random sampling or systematic sampling in both techniques when doing d final selection of subjects from each group
david
Umair
A company owns two retail outlets. The weekly sale of the two stores during the past years is as follows. Weekly Sales Rs. In 000 21-25 26-30 31-35 36-40 41-45 46-50 51-55 56-60 61-65 66-70 No of weeks Store I 30 45 95 60 55 33 53 76 38 23 Store II 155 23 34 56 65 54 34 23 24 54 Find out
Umair
Yunisa By By By OpenStax By OpenStax By OpenStax By Subramanian Divya By OpenStax By By Jonathan Long By John Gabrieli By Danielle Stephens By OpenStax