Question
In: Statistics and Probability
Use R to solve the following problem: A study was carried out to investigate the variation...
Use R to solve the following problem: A study was carried out to investigate the variation of rainbow trout weights in a certain creek. The weights (in kilograms) of 10 randomly selected fish are listed below: 0.78, 0.45, 0.35, 0.76, 0.57, 0.42, 0.33, 0.68, 0.66, 0.42
Assume that the population is approximately normally distributed. Test the hypothesis that the unknown population variance is less than 0.08 kg2 at alpha=0.05. Be sure to list (i) your hypotheses, (ii) test statistic, (iii) decision, and (iv) conclusion.
Solutions
orchestra answered 1 year agoRelated Solutions
Use R studio to answer the following. A study was carried out to investigate the variation...
Use R studio to answer the following.
A study was carried out to investigate the variation of rainbow
trout weights in a certain creek. The weights (in kilograms) of 10
randomly selected fish are listed below:
0.78, 0.45, 0.35, 0.76, 0.57,
0.42, 0.33, 0.68, 0.66, 0.42
Assume that the population is
approximately normally distributed. Hint: make a vector
to enter the weight data into R, e.g.:
> wt = c(0.78, ..., 0.42)
Find the 90% confidence interval for the unknown population...
1. Basic use of R/R Studio. Solve the following problem in R and print out the...
1. Basic use of R/R Studio. Solve the following problem
in R and print out the commands and outputs.
(a) Create a vector of the positive odd integers less than 100;
Remove the values greater than 60 and less than 80; Find the
variance of the remaining set of values
(b) What’s the difference in output between the commands 2*1:5
and (2*1):5? Why is there a difference?
(c) If you wanted to enter the odd numbers from 1 to 19...
Question 1 (18 marks) A pharmaceutical company carried out a study to investigate if men and...
Question 1
A pharmaceutical company carried out a study to investigate if
men and women, of the same age, have different levels of the high
density lipoprotein (HDL) type of cholesterol. This is the type of
cholesterol that is labelled “good” as it helps prevent coronary
disease. A small volunteer sample of men and women aged 40-45 of
general good health was taken as a preliminary trial. Their blood
HDL cholesterol levels (mg/dL) were measured with the following
results:
MALE:...
A ["prospective", OR "retrospective"] cohort study is carried out to investigate the association between occupational arsenic...
A ["prospective", OR "retrospective"] cohort
study is carried out to investigate the association between
occupational arsenic inhalation and neurological exposure and
neurological effects among workers in a copper smelter. For the
sake of simplicity, let’s assume there are two possible exposure
categories: high and low (for example, those working in the
smelting process and those working in administration). The exposure
was carefully assessed by review of company records which reflected
very good exposure monitoring (both air sampling and urine
testing)....
An experiment was carried out to investigate the effect of species (factor A, with I =...
An experiment was carried out to investigate the effect of
species (factor A, with
I = 4)
and grade (factor B, with
J = 3)
on breaking strength of wood specimens. One observation was made
for each species—grade combination—resulting in SSA = 443.0, SSB =
424.6, and SSE = 125.4. Assume that an additive model is
appropriate.
(a)
Test
H0: α1 =
α2 = α3 =
α4 = 0
(no differences in true average strength due to species)
versus
Ha:...
An experiment was carried out to investigate the effect of species (factor A, with I =...
An experiment was carried out to investigate the effect of
species (factor A, with I = 4) and grade (factor B, with J = 3) on
breaking strength of wood specimens. One observation was made for
each species—grade combination—resulting in SSA = 444.0, SSB =
424.6, and SSE = 122.4. Assume that an additive model is
appropriate. (a) Test H0: α1 = α2 = α3 = α4 = 0 (no differences in
true average strength due to species) versus Ha:...
Discuss how to use R programming to solve the following problem. You’re not just writing the...
Discuss how to use R programming to solve the following problem.
You’re not just writing the R code, you are also discussing the
process.
Given a person’s full name in the format of firstName
middleName lastName such as Michael Carlos Dumas,
write R code(s) to convert it to the format of lastName,
middleInitial, firstName.
In the case of Michael Carlos Dumas, the converted name is Dumas,
C. Michael. Your solution should work with any names that comply
with the format....
SOLVE THE FOLLOWING USING STATISTICAL SOFTWARE R. SHOW YOUR CODE PROBLEM 1 A study of 400...
SOLVE THE FOLLOWING USING STATISTICAL SOFTWARE R. SHOW YOUR
CODE
PROBLEM 1
A study of 400 glaucoma patients yields a sample mean of 140 mm
and a sample standard deviation of 25 mm for the the following
summaries for the systolic blood pressure readings. Construct the
95% and 99% confidence intervals for μ, the population average
systolic blood pressure for glaucoma patients.
PROBLEM 2
Suppose that fasting plasma glucose concentrations (FPG) in some
population are normally distributed
with a mean...
In a study on air pollution carried out by an experimental station, we obtained the following...
In a study on air pollution carried out
by an experimental station, we obtained the following amounts of soluble benzene, suspended in
organic in micrograms per m3
, in different samples
of air:
2.28, 1.9, 3.32, 2.68, 2.57, 2.57, 0.928, 1.22
Assuming that the sampled population is approximately normal, construct a confidence interval at the level
90% for the corresponding real average.
Question 2: An investigation has been carried out to investigate which of the beverages that two...
Question 2: An investigation has been carried out to investigate
which of the beverages that two separate companies put on the
market is consumed more by consumers. In the first sample of 100
people, the average monthly consumption was 5 liters, in the second
sample of 110 people, the average monthly consumption was 7 liters,
and the standard deviations were 2 and 3 liters, respectively. Test
unilaterally according to the 5% significance level.
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- With VMI, members of the supply chain share planning, demand, forecasting, and inventory information.
- Large lots are desirable in supply chain coordination despite increasing holding costs.
- ***Convert the C++ to Python*** #include <iostream> using std::cout; using std::cin; using std::endl; int charClass; char...
- Make-or-Buy Decision Fremont Computer Company has been purchasing carrying cases for its portable computers at a...
- The following costs were incurred for the single product produced during the first year of operations...
- Non-constant growth model: Do=$2.00 required return on equity= 5% g= 9% n=1,2 g=7% n=3,4 g=3% n=5...
- . Find all x ∈ Z143 such that x2Ξ 7 (mod 143). Please explain all steps...
ADVERTISEMENT