Question

A researcher claims that adult German Shepherd male dogs fed a special diet have an average weight of 85 pounds. A random sample of 12 such dogs shows an average weight of 83.2 pounds with a standard deviation of 2.5 pounds

(a) Test an appropriate hypotheses. use a significant level of 0.05

(b) Find the 95% confident interval for the true mean weight

Answer #1

A random sample of 17 adult male wolves from the Canadian
Northwest Territories gave an average weight x1 = 97.4 pounds with
estimated sample standard deviation s1 = 5.5 pounds. Another sample
of 22 adult male wolves from Alaska gave an average weight x2 =
89.6 pounds with estimated sample standard deviation s2 = 6.9
pounds. Please show all steps in getting the answer. Thanks
(a) Categorize the problem below according to parameter being
estimated, proportion p, mean μ, difference...

A random sample of 22 adult male wolves from the Canadian
Northwest Territories gave an average weight x1
= 96.0 pounds with estimated sample standard deviation
s1 = 5.7 pounds. Another sample of 28 adult
male wolves from Alaska gave an average weight
x2 = 88.0 pounds with estimated sample standard
deviation s2 = 6.2 pounds.
(a) Categorize the problem below according to parameter being
estimated, proportion p, mean μ, difference of
means μ1 – μ2, or
difference of proportions...

1. A company claims that the average lifespan of a bicycle tire
that they manufacture is 1200 miles. You randomly and independently
collect a sample of 31 of these tires and find that the average
distance these tires lasted was 1125.7 miles, with a standard
deviation of 275 miles.
A 90% confidence interval for the population mean lifetime of
these tires is (1041.9, 1209.5).
Select all true statements.
a. The confidence interval indicates that the company's claim
that their tires...

According to the National Health and Nutrition Survey (NHANES)
sponsored by the U.S. government, a random sample of 712 males
between 20 and 29 years of age and a random sample of 1,001 males
over the age of 75 were chosen and the weight of each of the males
were recorded (in kg). Do the data provide evidence that the
younger male population weighs more (on average) than the older
male population? Use “Y” for ages 20-29 and “S” for...

Thirty small communities in Connecticut (population near 10,000
each) gave an average of x = 138.5 reported cases of
larceny per year. Assume that σ is known to be 43.7cases
per year.
(a) Find a 90% confidence interval for the population mean
annual number of reported larceny cases in such communities. What
is the margin of error? (Round your answers to one decimal
place.)
lower limit
upper limit
margin of error
(b) Find a 95% confidence interval for the population...

A medical researcher would like to determine how effective a new
form of knee surgery is for
treating knee pains. (In particular, is there a relationship
between surgery status and pain
reduction status?) He gathers 500 people with knee pain who are
scheduled to have this
surgery, and 500 people with knee pain who are not scheduled to
have this surgery. He follows
up with both groups after 2 months and determines the number of
participants of each group
who...

Delta airlines case study
Global strategy. Describe the current global
strategy and provide evidence about how the firms resources
incompetencies support the given pressures regarding costs and
local responsiveness. Describe entry modes have they usually used,
and whether they are appropriate for the given strategy. Any key
issues in their global strategy?
casestudy:
Atlanta, June 17, 2014. Sea of Delta employees and their
families swarmed between food trucks, amusement park booths, and
entertainment venues that were scattered throughout what would...

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