QUESTION 1:Hydroxychloroquine has been applied to treat coronavirus. Patients are asked to
rate the severity of their symptoms (out of 10) before and after treatment where conditions
are kept identical before and after treatment The results are shown in the list below. Is there
evidence to support the claim that the treatment reduces severity of symptoms (a =0.05)?
QUESTION 2: In question above, the drug company that makes Hydroxychloroquine is
unhappy with the outcome. They ask you to perform an unequal variances test. What advice
to do have for them before attempting this and why?
QUESTION 3: Perform the hypothesis test requested in Question above at a =0.05?
Question 4: The same drug company as mentioned in the 3 previous questions attempting to
create measure of called variance, This variance combines
variance sample 1(5,21 and sample 2(s) where this variance defined as:
unbiased estimator of the population variance? Show working
Question 5: Anew Apple iphone produced such that the mass of the phone is normally
distributed with mean of 220 grams and standard deviation of 25grams What the
probability that single iphone's massi more than 250 grams?
Question 6: Is the ANOVA fest always sided upper? Why/why not?
Question 7:1 an experiment to investigate the performance of different suppliers of Formula
1 racing tires, five tires from each supplier were tested and the number of miles until failure
recorded The partial ANOVA table shown fill it out and carry out the hypothesis test
Question 8: Xisa variable that represented by continuous uniform distribution over the
interval 5)ie a. Mathematically state the Probability Density Function (PDF)ie. f(x).
b. Determine the probability that Xis less than 3.
c. Determine the standard deviation of X.
d. Find the Cumulative Distribution Function (CDF) of Xin its simplest form
e. Determine F(2)
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