Question

The Columbus Dispatch conducted a study. Two identical football, one filled with helium and one filled with ordinary air, were used. A casual observer was unable to detect a difference in the two footballs. A novice kicker was used to punt the footballs. A trial consisted of kicking both footballs in a random order. The kicker did not know which football he was kicking. The distance of each punt was recorded, then another trial was conducted. A total of 39 trials were run. Do the data indicate that helium-filled footballs travel farther than air-filled footballs? Give a confidence interval and significance test. (Data: FTBALL)

Helium | Air | Difference |

25 | 25 | 0 |

16 | 23 | -7 |

25 | 18 | 7 |

14 | 16 | -2 |

23 | 35 | -12 |

29 | 15 | 14 |

25 | 26 | -1 |

26 | 24 | 2 |

22 | 24 | -2 |

26 | 28 | -2 |

12 | 25 | -13 |

28 | 19 | 9 |

28 | 27 | 1 |

31 | 25 | 6 |

22 | 34 | -12 |

29 | 26 | 3 |

23 | 20 | 3 |

26 | 22 | 4 |

35 | 33 | 2 |

24 | 29 | -5 |

31 | 31 | 0 |

34 | 27 | 7 |

39 | 22 | 17 |

32 | 29 | 3 |

14 | 28 | -14 |

28 | 29 | -1 |

30 | 22 | 8 |

27 | 31 | -4 |

33 | 25 | 8 |

11 | 20 | -9 |

26 | 27 | -1 |

32 | 26 | 6 |

30 | 28 | 2 |

29 | 32 | -3 |

30 | 28 | 2 |

29 | 25 | 4 |

29 | 31 | -2 |

30 | 28 | 2 |

26 | 28 | -2 |

Answer #1

Dataset:
Husband Wife
53 50
38 34
46 44
30 36
31 23
26 31
29 25
48 51
65 46
29 26
28 23
29 32
25 22
22 21
21 24
43 50
24 27
38 33
33 26
35 29
40 29
27 25
27 24
49 38
48 39
27 27
26 24
40 34
35 37
21 26
32 39
30 28
60 52
36 40
25 23
66 55
52 34
41 40
43 ...

descriptive statistics
for the given data
4 8 18 20 21 22 23 24 25 26 27 28 29 30 31 31 32 32 33 33 34 35 36
37 38 39 47 53

Person
number
X
Value
Y
Value
Person number
X
Value
Y
Value
Person number
X
Value
Y
Value
1
24
30
11
39
42
21
21
27
2
42
53
12
60
65
22
33
29
3
20
27
13
34
40
23
25
27
4
31
30
14
24
26
24
22
25
5
22
24
15
51
57
25
28
33
6
46
47
16
80
83
26
34
40
7
52
60
17
28
27
27
53...

A study was conducted to see if students’ writing skills
continue to improve as the academic year progresses. English 101
students were asked to write essays throughout the year in
September, December, March and June. The scores were compared to
see if there is any improvement in this one-year course. Was there
a significant improvement?
The appropriate test for this problem is:
one-way ANOVA
repeated measurements
Student
September
December
March
June
1
17
23
21
24
2
25
21
21...

Use Excel to find the following: Compare the height, weight (in
inches), and age for Eagles versus Patriots, using t tests. Provide
the conclusions based on the t tests.
Gaps between numbers under age are no value
77 each
Eagles:
Age
35
28
23
23
29
23
24
31
28
24
24
24
26
31
23
26
25
25
31
29
33
30
22
28
23
24
29
23
24
26
32
26
24
23
29
24
23
30
24...

The results of a sample of 372 subscribers
toWiredmagazine shows the time spent using the Internet
during the week. Previous surveys have revealed that the population
standard deviation is 10.95 hours. The sample data can be found in
the Excel test data file.
What is the probability that another sample of 372 subscribers
spends less than 19.00 hours per week using the Internet?
Develop a 95% confidence interval for the population mean
If the editors of Wiredwanted to have the...

____________________________________________
The results of a sample of 372 subscribers to Wired
magazine shows the time spent using the Internet during the week.
Previous surveys have revealed that the population standard
deviation is 10.95 hours. The sample data can be found in the Excel
test data file.
What is the probability that another sample of 372 subscribers
spends less than 19.00 hours per week using the Internet?
____________________________________________
Develop a 95% confidence interval for the population mean
____________________________________________
If the editors...

Greene and Touchstone conducted a study to relate birth weight
and Estriol level in pregnant women as given in Table-1:
Table: 1 Sample Data from Greene and Touchstone study relating
birth weight and estriol.
i
Estriol (mg/24 hr) xi
Birth weight(g/100) yi
i
Estriol (mg/24 hr) xi
Birth weight(g/100) yi
1
7
25
17
17
32
2
9
25
18
25
32
3
9
25
19
27
34
4
12
27
20
15
34
5
14
27
21
15
34...

We want to compare the
average gas mileage of American-made cars vs. Japanese-made
cars.
The claim is that the Japanese cars and American cars do not get
the same gas mileage.
Use the list data below to test the hypothesis that the Japanese
cars and American cars do not get the same gas mileage.
The American cars are in list1 and the Japanese cars in list2
below
We do not know whether the mileages are normally distributed or
not, but...

Studen Age
28
27
28
30
29
29
35
29
34
29
25
30
28
31
27
27
34
30
26
27
31
32
34
27
31
34
32
29
25
30
32
28
34
28
23
27
30
26
35
31
25
33
29
31
26
33
33
31
38
22
1. Follow a good modeling scheme. Make sure all calculations are
done in Excel
2. Cell
with formulas, intermediate calculations painted light green
3. All
calculations or numbers...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 2 minutes ago

asked 12 minutes ago

asked 14 minutes ago

asked 23 minutes ago

asked 56 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago