The mean BMI in patients free of diabetes was reported as 28.2. The investigator conducting the...
The mean BMI in patients free of diabetes was reported as 28.2.
The investigator conducting the study hypothesizes that the BMI in
patients free of diabetes is higher. Based on the data given below
is there evidence that the BMI is significantly higher that 28.2?
Use a 5% level of significance.
25 27 31 33 26 28 38 41 24 32 35 40
Critical t
value:
(2 points)
Computed t =
(2 points)
Based on comparing the critical t value to the computed t
value which of the following is (are) true?
Homework Answers
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The mean BMI in patients free of diabetes was reported as 28.2.
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The mean body mass index (BMI) in patients free of diabetes was reported as 28.2. Based on the data provided in Q19, an investigator wants to assess whether the true BMI mean is significantly higher than 28.2. At a 5% significant level, what is the critical value this investigator should choose for this hypothesis testing? (Round to 3 decimal places)
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A hospital reported that the normal death rate for patients with extensive burns (more than 40%...
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Question 11 1 pts In 2012, the mean weight of women was reported at 2012 = 162 lbs. Suppose that an investigator hypothesizes that weights are even higher in 2015. She collected a sample of 29 women in the year of 2015, from which she measured a mean weight of 158 lbs with a standard deviation of 10 lbs. An two-tailed alpha level = .05 is applied. Select ALL correct statement(s) below: The investigator aims to compare a sample mean...
A hospital reported that the normal death rate for patients with
extensive burns (more than 40% of skin area) has been significantly
reduced by the use of new fluid plasma compresses. Before the new
treatment, the mortality rate for extensive burn patients was about
60%. Using the new compresses, the hospital found that only 44 of
93 patients with extensive burns died. Use a 1% level of
significance to test the claim that the mortality rate has
dropped.
What are...
a. The question that you are seeking to answer with the
hypothesis test (e.g., Do we have evidence to conclude that mean
spending has declined?)
b. The null and alternative hypotheses (in words as well as
using symbols)
c. The level of significance
d. The procedure to be used (e.g., Mean: population standard
deviation known)
e. Excel output (copy and paste from Excel into your
word-processed document)
f. The value of the test statistic
g. The critical value
h. The...
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