Question
In: Statistics and Probability
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table...
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table shows the results for the number of bacteria per cubic foot for both types of rooms.
Full data set
Carpeted
10.9, 12.2, 7.4, 9.3, 15, 11.2, 11.7, 6.1
Uncarpeted
4, 8.1, 10.1, 13.9, 4.9, 7.4, 5.2, 6.8
Determine whether carpeted rooms have more bacteria than uncarpeted
rooms at the
α=0.01 level of significance. Normal probability plots indicate that the data are approximately normal and boxplots indicate that there are no outliers.
State the null and alternative hypotheses. Let population 1 be carpeted rooms and population 2 be uncarpeted room.
Determine the P-Value
Determine the T-test value
Solutions
orchestra answered 1 year agoRelated Solutions
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table...
A researcher wanted to determine if carpeted rooms contain more
bacteria than uncarpeted rooms. The table shows the results for the
number of bacteria per cubic foot for both types of rooms.
Carpeted Uncarpeted
10.8 10.5
6 8.4
9.8 6.5
8 6.7
14.7 11.7
9.2 5.5
15.6 13.3
9.9 10.6
Determine whether carpeted rooms have more bacteria than
uncarpeted rooms at the α=0.01 level of significance. Normal
probability plots indicate that the data are approximately normal...
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table...
A researcher wanted to determine if carpeted rooms contain more
bacteria than uncarpeted rooms. The table shows the results for the
number of bacteria per cubic foot for both types of rooms.
Carpeted Uncarpeted
9 10
7.3 4.3
13.4 13.2
13.5 4.2
10.7 9
7.7 7.6
8.1 7.8
12 4.1
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table...
A researcher wanted to determine if carpeted rooms contain more
bacteria than uncarpeted rooms. The table shows the results for the
number of bacteria per cubic foot for both types of rooms.
carpeted
10.6
6
8.1
9.7
8.6
14.1
11
13.2
uncarpeted
5.2
4.5
6.9
11.1
12.9
5.2
4.9
10.1
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table...
A researcher wanted to determine if carpeted rooms contain more
bacteria than uncarpeted rooms. The table shows the results for the
number of bacteria per cubic foot for both types of rooms.
Full data set
Carpeted
Uncarpeted
13.1
6.5
11.8
7.7
12.2
7.7
15.3
6.2
14.9
11
9.4
12.8
12.1
8.1
5.9
5
Determine whether carpeted rooms have more bacteria than
uncarpeted rooms at the
α=0.01
level of significance. Normal probability plots indicate that
the data are approximately normal...
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table...
A researcher wanted to determine if carpeted rooms contain more
bacteria than uncarpeted rooms. The table shows the results for the
number of bacteria per cubic foot for both types of rooms.
Full data set
Carpeted
Uncarpeted
11.411.4
14.914.9
9.19.1
7.97.9
6.26.2
1313
14.114.1
12.212.2
6.66.6
6.56.5
9.19.1
12.912.9
7.97.9
10.910.9
11.511.5
7.97.9
Researchers wanted to determine if carpeted rooms contained more bacteria than uncarpeted rooms. To determine the...
Researchers wanted to determine if carpeted rooms
contained more bacteria than uncarpeted rooms. To determine the
amount of bacteria in a room, researchers pumped the air from the
room over a Petri dish at the rate of 1 cubic foot per minute for
eight carpeted rooms and eight uncarpeted rooms. Colonies of
bacteria were allowed to form in the 16 Petri dishes. The results
are given in the table below. Assume the distribution to be
approximately normal. Do carpeted rooms...
A researcher wanted to determine if the incidence of influenza was more frequent in Caucasian or...
A researcher wanted to determine if the incidence of influenza
was more frequent in Caucasian or Hispanic populations. He decided
to investigate by accessing Emergency Room records at a local
hospital. He found influenza was 2x times more frequent in
Hispanics than in Caucasians. What could be the possible bias
associated with the study and how did it influence the findings of
the study? (5 points)
Describe in detail how would you conduct the above study so that
selection bias...
A researcher claims that the stomachs of blue crabs from Location A contain more fish than...
A researcher claims that the stomachs of blue crabs from
Location A contain more fish than the stomachs of blue crabs from
Location B. The stomach contents of a sample of 14 blue crabs from
Location A contain a mean of 199 milligrams of fish and a standard
deviation of 36 milligrams. The stomach contents of a sample of 7
blue crabs from Location B contain a mean of 183 milligrams of fish
and a standard deviation of 43 milligrams....
A researcher wanted to determine the number of televisions in households. He conducts a survey of...
A researcher wanted to determine the number of televisions in
households. He conducts a survey of 40 selected households and
obtains the data in the accompanying table. Complete parts (a)
through (h) below.
Table of television counts:
0 3 2 2 1 2 1 3
3 2 1 4 2 1 3 2
2 1 1 3 1 1 2 2
2 4 0 1 4 5 2 1
2 4 2 1 1 2 2 3
A.) Are these...
A researcher wanted to test the theory that people who live in urban environments are more...
A researcher wanted to test the theory that people who live in
urban environments are more liberal compared to people who live in
suburban environments. To test this, they gave a group of people
from the suburbs and a group of people from the city a measure of
liberalness (the higher the score, the more liberal-minded you
are). The data are given below.
Suburban: ?=15, n=60, ?$ = 3.81 $# Urban: ?=20, n=60, ?$ =
3.39
Run the appropriate hypothesis...
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