Question

Two diets were given to samples of pigs over a period of time, and the following weight gains (in lbs) were recorded

Diet A 8, 4, 14, 15, 11, 10, 6, 12, 13, 7

Diet B 7, 13, 22, 15, 12, 14, 18, 8, 21, 23, 10, 17

Suppose we assume the normal regression model for these data.

(a) Carry out a one-way ANOVA to test for a difference between the conditional means of Y given Diet.

b) Construct 0.95-confidence intervals for differences between the means

Answer #1

With all the fad diets advertised on TV, a researcher wanted to
know if there was a significant difference in weight loss depending
on which new fad diet you were on. Over the course of 2 weeks, a
total of 12 male volunteers who weighed the same and had similar
lifestyles were broken up into 3 groups: Diet 1, Diet 2, and Diet
3. Conduct an ANOVA on the following table with alpha = 0.5 to
determine if at least...

In a collaborative trial, four laboratories were sent samples
from the same batch of a pharmaceutical product and requested to
perform ten assays and report the results based on percentage of a
labeled amount of the drug.
Physician
Time
A
9
A
12
A
10
A
7
A
11
A
13
A
8
A
13
B
10
B
6
B
7
B
10
B
11
B
9
B
9
B
11
C
8
C
9
C
12
C
10
C...

The following samples of observations were randomly
selected.
x:
5
3
6
3
4
4
6
8
y:
13
15
7
12
13
11
9
5
Determine the regression equation.
Determine the value of y when x is 7.

1A) An experiment was designed to estimate the mean difference
in weight gain for pigs fed ration A as compared with those fed
ration B. Eight pairs of pigs were used. The pigs within each pair
were litter-mates. The rations were assigned at random to the two
animals within each pair. The gains (in pounds) after 45 days are
shown in the following table. Assuming weight gain is normal, find
the 95% confidence interval estimate for the mean of the...

Twenty laboratory mice were randomly divided into two groups of
10. Each group was fed according to a prescribed diet. At the end
of 3 weeks, the weight gained by each animal was recorded. Do the
data in the following table justify the conclusion that the mean
weight gained on diet B was greater than the mean weight gained on
diet A, at the α = 0.05 level of significance? Assume normality.
(Use Diet B - Diet A.) Diet A...

A study was conducted in order to compare the weight loss for
two diet plans, Plan A and Plan B. Two hundred dieters were
randomly selected. Of this sample 100 were placed on the Plan A
diet and the remaining 100 were assigned to the Plan B diet. After
the dieters were on the diet for 2 months the average weight loss
and sample standard deviation of the weight losses were recorded.
For the Plan A group there was an...

The table below presents three samples of data. If we conduct a
hypothesis test for the equality of all three means with the
statistical confidence of 90%, what would the value of the Mean
Squares Between Groups be?
Sample 1
Sample
2
Sample
3
7
11
6
5
8
5
7
11
4
6
7
5
6
13
14
6
13
5
6
12
5
6
11
6
8
8
8
9
7
6
7
6
14
9
7
4...

Electrobat, a battery manufacturer, is investigating how storage
temperature affects the performance of one of its popular deep-cell
battery models used in recreational vehicles. Samples of 30 fully
charged batteries were subjected to a light load under each of four
different storage temperature levels. The hours until deep
discharge (meaning ≤ 20% of charge remaining) were measured. The
data is shown in the accompanying table.
0
degrees F (hrs to discharge)
30 degrees F (hrs to discharge)
60 degrees F...

Using samples of 200 credit card statements, an Auditor found
the following:
---Sample Number: 1 2
3 4
5 6 7 8
9 10 11
12 13 14 15
Number of Errors: 17 12
11 12 10 10
17 15
12 13
15 10
7 8 10
Determine lower and upper control limits for the fraction of
errors using three-sigma limits.
Question 8 options:
0 , .126
.017 , .101
.026 , .093
.009 , .109
None of the Above
The Quality Control...

The following data is X-Bar and R values for 12 samples of size
n = 5. They were taken from a process measuring various inductance
values for a new production line of high fidelity speakers.
Subgroup No., (X-Bar), ((Range))
1 (345) ((13)), 2 (347) ((14)), 3 (350) ((12)), 4 (346) ((11)),
5 (350) ((15)), 6 (345) ((16)), 7 (349)((14)), 8 (348) ((13)), 9
(348)((12)), 10 (354) ((15)), 11 (352) ((13)), 12 (355) ((16))
Create X-Bar and R control charts from...

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