Question

550 | |||||||||||

Population | |||||||||||

Summary statistics: | |||||||||||

Column | n | Mean | Variance | Std. dev. | Std. err. | Median | Range | Min | Max | Q1 | Q3 |

Books | 368 | 442 | 32868 | 181.3 | 9.451 | 416.5 | 920 | 80 | 1000 | 300 | 600 |

Summary statistics: | |||||||||||

Column | n | Mean | Variance | Std. dev. | Std. err. | Median | Range | Min | Max | Q1 | Q3 |

mean(Sample(Books)) | 1000 | 444 | 1045.1 | 32.33 | 1.022 | 441.4 | 218.6 | 353.6 | 572.1 | 420.8 | 465.5 |

6. a) What is the range of values in the population? (Give the interval, not a single number.)

b) What is the range of values of the sample means (1dp)?

c) What is the population mean (1dp)?

d) What is the population standard deviation (2dp)?

e) What is the mean of the sample means (1dp)?

f)How close to the population mean is it?

7. a) What is the standard deviation of the sample means (2dp)?

b) What is the ratio of the sample mean standard deviation to the population standard deviation (2dp)? (i.e., what proportion results when you divide the sample mean std. dev. by the population std. dev.?)

c) Why do you think you got this ratio?

Answer #1

**Please don't hesitate to give a "thumbs up" to the
answer in case you're satisfied with the answer.**

6.

a. range of values is from Min to Max = 80 to 1000

b. range of sample mean is 353.6 to 572.1

c. pop. mean = 442

d. pop. dev = 181.3

e. mean of sample mean = 444

f. Very close. 442 is very close to 444

7

a. Stdev of sampl e mean is 32.33

b. ratio if sample dev to pop. dev = 32.33/181.3 = .1783

c. I got a smaller sample deviation because when sample'
distribution is taken basically the deviation reduces , hence a
ratio of <1

The five-number summary for a set of data is given below.
Min
Q1
Median
Q3
Max
43
52
53
57
90
What is the interquartile range of the set of data?

The following summary statistics were calculated for a
continuous variable in a particular data set; n=10, mean=8.90,
sd=9.69, median=6.105, min=0.512, max=39.92, Q1=1.967, Q3=8.103.
Would it be appropriate to use the Student’s t distribution to
construct a confidence interval for the population mean from these
data?
i) yes;
or ii) no;
or iii) possibly, following a suitable transformation?

Summary Statistics for Number of People in Households
Place
Mean
Median
Std. dev.
IQR
n
Ealing England 1599
4.68
4
2.74
3
85
Bristol RI 1689
5.82
6
2.75
4
72
Nishinomoya Japan 1713
4.99
5
2.51
4
132
Belgrad Serbia 1734
5.41
5
2.62
4
178
Longuenesse France 1778
5.02
5
2.51
4
66
Vaudreuil-Soulanges, Quebec 1851
6.63
7
2.75
4
97
California students, 2008-2009
3.99
4
1.55
2
272
Australian Students, 2008
4.46
4
1.25
1
569
On...

For each of the
following sets of numbers, calculate the statistics listed in the
column to the right of the statistic label, or follow the
directions listed.
Add any comments below each
problem explaining what you found
9 pts (comments worth 2)
9 pts (comments worth 2)
10 pts (comments worth 2)
12 pts (comments worth 2)
10 pts (5 for output, 5 for comments)
#1
227
This is a sample
#2
22
This is a population
#3
168
This...

Percentile--------------------------Speed
100%------------Max--------------34.060
97.5%-------------------------------30.976
90.0%-------------------------------28.978
75.0%----------Q3---------------- 25.785
50.0%---------Median----------- 23.525
25.0%------------Q1---------------21.547
10.0%-------------------------------19.163
2.5%---------------------------------16.638
0%-------------Min-----------------16.270
The mean of 100 car speeds is 23.84 mph, with a standard
deviation of 2.56 mph. a. Using a normal model, what values should
border the middle 95% of all car speeds? b. Here are some summary
statistics.

Find every possible statistic of your data. (Mean, median, mode,
standard deviation, variance, midrange, range, etc.) explain what
these statistics mean in the context of your data without
defining or using a formula. Is the statistic realistic of
the population? Is it skewed? How is it distributed? What level of
measurement is it?
2005 Kelly Blue Book Used Cars
Price
Mean
$21,343.14
Standard
Error
$348.61
Median
$18,025.00
Mode
$10,921.95
Standard
Deviation
$9,884.85
Sample
Variance
97710314.9
Range
$62,116.54
Minimum
$8,638.93
Maximum...

Here are the summary statistics for ankle girth measurements (in
centimeters) for a random sample of 50 U.S. adults.
Summary statistics:
Column
Mean
Std. dev.
n
Ankle_girth
22.16 cm
1.86 cm
50
What is the estimated standard error for sample means from
samples of this size? (rounded to two decimal
places)
[
Select ]
["1.86", "0.26", "0.04"]
What is the critical T-score for...

Below gives a data set for movie budgets, and domestic and
worldwide box office gross (all in millions) for several major
movies over time. Test the claim, at the � = 0.01 level, that the
domestic box office gross has a wider variation than the worldwide
box office gross. Movie Data Sheet,
h̶t̶t̶p̶s̶:̶/̶/̶w̶w̶w̶.̶s̶t̶a̶t̶c̶r̶u̶n̶c̶h̶.̶c̶o̶m̶/̶a̶p̶p̶/̶i̶n̶d̶e̶x̶.̶p̶h̶p̶?̶d̶a̶t̶a̶i̶d̶=̶2̶1̶8̶8̶6̶8̶4̶
(See below table instead)
a. Note that some of the values for gross are zero. What does
this mean and does that effect how you should perform...

Below gives a data set for movie budgets, and domestic and
worldwide box office gross (all in millions) for several major
movies over time. Test the claim, at the � = 0.01 level, that the
domestic box office gross has a wider variation than the worldwide
box office gross. Movie Data Sheet,
h̶t̶t̶p̶s̶:̶/̶/̶w̶w̶w̶.̶s̶t̶a̶t̶c̶r̶u̶n̶c̶h̶.̶c̶o̶m̶/̶a̶p̶p̶/̶i̶n̶d̶e̶x̶.̶p̶h̶p̶?̶d̶a̶t̶a̶i̶d̶=̶2̶1̶8̶8̶6̶8̶4̶
(See below table instead)
Note that some of the values for gross are zero. What does this
mean and does that effect how you should perform the...

QUESTION 1
·
1 POINT
The following frequency table summarizes a set of data. What is
the five-number summary?
Value
Frequency
2
3
3
2
5
1
6
3
7
1
8
2
11
3
Select the correct answer below:
Min
Q1
Median
Q3
Max
2
7
9
10
11
Min
Q1
Median
Q3
Max
2
3
6
8
11
Min
Q1
Median
Q3
Max
2
3
4
8
11
Min
Q1
Median
Q3
Max
2
6
8
10
11...

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