Homework Answers
From the interaction plot, we can say that:
(a) light level 1, soil level 2 has the highest
group mean length.
(b) The main effect for soil type is likely significant,
and the main effect for light intensity is likely
significant.
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Bats are interested in determining the effect of two different factors on the length (in )...
Medical researchers interested in determining the relative effectiveness of two different drug treatments on people with...
Medical researchers interested in determining the relative effectiveness of two different drug treatments on people with a chronic mental illness established two independent test groups. The first group consisted of 14 people with the illness, and the second group consisted of 13 people with the illness. The first group received treatment 1 and had a mean time until remission of 172 days, with a standard deviation of 6 days. The second group received treatment and had a mean time until...
Independent Sample T-Test Researchers were interested in determining whether grounding techniques can decrease the length of...
Independent Sample T-Test Researchers were interested in determining whether grounding techniques can decrease the length of panic attacks with people diagnosed with severe anxiety disorder. Subjects were randomly assigned into two different groups. Group 1 served as a control group, while Group 2 were taught various grounding techniques to manage their anxiety. Subjects were instructed to time their next panic attack and to record the length in minutes. Alpha (level of significance) was set at .05. State the null and...
1. Fill out the following ANOVA table for the two-way ANOVA model. This table comes from a data set with 4 levels for fa...
1. Fill out the following ANOVA table for the two-way ANOVA model. This table comes from a data set with 4 levels for factor A, 3 levels for factor B, and 14 values in each group. (Round your answer for F to two decimal places, your answers for SS and MS to one decimal place, and the p-value to three decimal places. Do not round any numbers until the final input into the answer box.) Analysis of Variance Source DF...
Question 6 (1 point) You own a small storefront retail business and are interested in determining...
Question 6 (1 point) You own a small storefront retail business and are interested in determining the average amount of money a typical customer spends per visit to your store. You take a random sample over the course of a month for 10 customers and find that the average dollar amount spent per transaction per customer is $83.652 with a standard deviation of $15.2173. Create a 99% confidence interval for the true average spent for all customers per transaction. 1)...
Investigators working on commericially cultivating shrimp are interested in determining the best conditions in which for...
Investigators working on commericially cultivating shrimp are interested in determining the best conditions in which for them to grow. They are interested in knowing what impact water temperature (either 25 C, 30 C) and the salinity level (10 % 25 % and 40 %) have on the growth of shrimp. Three replicates were used for each of the 6 possible treatment combinations. Post-larval shrimp were placed in each of the 18 tanks and fed the same amount of food. After...
Transistor Manufacturing Study: A transistor manufacturer conducted an experiment to investigate the effects of three factors...
Transistor Manufacturing Study: A transistor
manufacturer conducted an experiment to investigate the effects of
three factors on PRODUCTivity (measured in thousands of dollars of
items produced) per 40-hour week. The factors were as follows:
Length of work week in DAYS (two levels): Five consecutive
8-hour days or four consecutive 10-hour days
SHIFT (two levels): day or evening shift
Number of coffee BREAKS (three levels): 0, 1, or 2
The experiment was conducted over a 24-week period with the 2 ×...
Investigators working on commericially cultivating shrimp are interested in determining the best conditions in which for...
Investigators working on commericially cultivating shrimp are interested in determining the best conditions in which for them to grow. They are interested in knowing what impact water temperatur (either 25 C, 30 C) and the salinity level (10 %, 25 % and 40 %) have on the growth of shrimp. Three replicates were used for each of the 6 possible treatment combinations. Post-larval shrimp were placed in each of the 18 tanks and fed the same amount of food. After...
Investigators working on commericially cultivating shrimp are interested in determining the best conditions in which for...
Investigators working on commericially cultivating shrimp are interested in determining the best conditions in which for them to grow. They are interested in knowing what impact water temperature (either 25 C, 30 C) and the salinity level (10 %, 25 % and 40 %) have on the growth of shrimp. Three replicates were used for each of the 6 possible treatment combinations. Post-larval shrimp were placed in each of the 18 tanks and fed the same amount of food. After...
Investigators working on commericially cultivating shrimp are interested in determining the best conditions in which for...
Investigators working on commericially cultivating
shrimp are interested in determining the best conditions in which
for them to grow. They are interested in knowing what impact water
temperature (either 25 C, 30 C) and the salinity level (10 %, 25 %
and 40 %) have on the growth of shrimp. Three replicates were used
for each of the 6 possible treatment combinations. Post-larval
shrimp were placed in each of the 18 tanks and fed the same amount
of food. After...
The following two-way table gives data for a 2 × 2 factorial experiment with two observations per factor-level combination:
The following two-way table gives data for a 2 × 2 factorial experiment with two
observations
per factor-level combination: The data are saved in the LM.TXT file. Factor B
Level 1 2
Factor A 1 29.6, 35.2 47.3, 42.1
2 12.9, 17.6 28.4, 22.7 a. Identify the treatments for this experiment. Calculate and plot the treatment means, using
the response variable as y-axis and the levels of factor B as the x-axis. Use the levels of
factor A as plotting symbols. Do...
Medical researchers interested in determining the relative effectiveness of two different drug treatments on people with a chronic mental illness established two independent test groups. The first group consisted of 14 people with the illness, and the second group consisted of 13 people with the illness. The first group received treatment 1 and had a mean time until remission of 172 days, with a standard deviation of 6 days. The second group received treatment and had a mean time until...
Question 6 (1 point) You own a small storefront retail business and are interested in determining the average amount of money a typical customer spends per visit to your store. You take a random sample over the course of a month for 10 customers and find that the average dollar amount spent per transaction per customer is $83.652 with a standard deviation of $15.2173. Create a 99% confidence interval for the true average spent for all customers per transaction. 1)...
Investigators working on commericially cultivating shrimp are interested in determining the best conditions in which for them to grow. They are interested in knowing what impact water temperature (either 25 C, 30 C) and the salinity level (10 % 25 % and 40 %) have on the growth of shrimp. Three replicates were used for each of the 6 possible treatment combinations. Post-larval shrimp were placed in each of the 18 tanks and fed the same amount of food. After...
Transistor Manufacturing Study: A transistor
manufacturer conducted an experiment to investigate the effects of
three factors on PRODUCTivity (measured in thousands of dollars of
items produced) per 40-hour week. The factors were as follows:
Length of work week in DAYS (two levels): Five consecutive
8-hour days or four consecutive 10-hour days
SHIFT (two levels): day or evening shift
Number of coffee BREAKS (three levels): 0, 1, or 2
The experiment was conducted over a 24-week period with the 2 ×...
Investigators working on commericially cultivating shrimp are interested in determining the best conditions in which for them to grow. They are interested in knowing what impact water temperatur (either 25 C, 30 C) and the salinity level (10 %, 25 % and 40 %) have on the growth of shrimp. Three replicates were used for each of the 6 possible treatment combinations. Post-larval shrimp were placed in each of the 18 tanks and fed the same amount of food. After...
Investigators working on commericially cultivating shrimp are interested in determining the best conditions in which for them to grow. They are interested in knowing what impact water temperature (either 25 C, 30 C) and the salinity level (10 %, 25 % and 40 %) have on the growth of shrimp. Three replicates were used for each of the 6 possible treatment combinations. Post-larval shrimp were placed in each of the 18 tanks and fed the same amount of food. After...
Investigators working on commericially cultivating
shrimp are interested in determining the best conditions in which
for them to grow. They are interested in knowing what impact water
temperature (either 25 C, 30 C) and the salinity level (10 %, 25 %
and 40 %) have on the growth of shrimp. Three replicates were used
for each of the 6 possible treatment combinations. Post-larval
shrimp were placed in each of the 18 tanks and fed the same amount
of food. After...
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