Question

Can i please get detailed answer for this question from my assignment. it has overall weightage of 9 marks. Thanks

We are interested in estimating the mean systolic blood pressure for female diabetics between the ages of 30 and 34. For the purposes of this question you may assume that blood pressure in this population has a normal distribution with standard deviation of 11.8 mmHg.

a. A random sample of 10 women is selected from this population. The average systolic blood pressure in this sample is 130 mmHg. Calculate (by hand) a 95% confidence interval ,the mean systolic blood pressure in the population of female diabetics aged 30 to 34.

b. Interpret your confidence interval in a) in words. (What does “95% confidence” mean?)

c. Is your confidence interval in a) exact or approximate? Explain.

d. How large would the random sample of women need to be for a 99% confidence interval to have a total width of 10 mmHg?

Answer #1

a) For 95% confidence loevel, critical value of z is . The 95% confidence interval ,the mean systolic blood pressure in the population of female diabetics aged 30 to 34 is:

b) We are 95% confident that true mean systolic blood pressure in the population of female diabetics aged 30 to 34 lies between 122.69 and 137.31.

95% confidence means if we take many samples of size 10 from same population, we expect 95% of the confidence intervals will contain true mean systolic blood pressure.

c) No because we expect that there are 5% confidence intervals do not contain true mean and this interval can be one of them.

d) Margin of error, E = width/2 = 10/2 = 5

For 99% confidence loevel, critical value of z is .

The sample size is:

please provide detailed explanation for each part of the
question.
We are interested in estimating the mean systolic blood pressure
for female diabetics between the ages of 30 and 34. For the
purposes of this question you may assume that blood pressure in
this population has a normal distribution.
a. A random sample of 10 women is selected from this population.
The average systolic blood pressure in this sample is 130 mmHg. The
sample standard deviation is 9.2 mmHg. Calculate...

Instructions: Be sure to define all random variables/events used
in probability calculations. You should obtain “exact”
probabilities from R rather than giving approximate probabilities
using the 68-95-99.7 rule. Provide any code you use (final computed
values are not sufficient). I strongly recommend that you create a
Jupyter Notebook for this assignment, embedding your written
comments in Markdown cells.
2. The systolic blood pressure for female diabetics
between the ages of 30 and 34 has mean 131 mmHg and standard
deviation...

R Studio Suppose systolic blood pressure of adults has a normal
distribution with mean 130 and standard deviation 35. Research
question: Do statistics teachers have a higher average systolic
blood pressure than 130? A random sample of 100 statistics teachers
is obtained and the mean is 135. (The population standard deviation
is known, so we use Z for critical values.)
Solve the using the Confidence Interval Hypothesis Test approach
and t.test() Approach. Use the Pima.tr data set to evaluate the...

You have data from a sample of 65 workers
at a local factory who are full time employees. The mean systolic
blood pressure of this sample 120. You know that
the population standard deviation (?) of all workers' systolic
blood pressure at the local factory is
18."
Which of the below represents the best
interpretation of the 95% confidence
interval you calculated on the previous question for the
unknown population mean systolic blood pressure of local factory
workers who are...

Utilize the following information and answer the questions
below: A 95% confidence interval obtained from a sample of 100
outpatients for the true population mean normal mean systolic blood
pressure is given by (114 mmHG, 120 mmHG).
Construct the confidence interval. Provide a correct
interpretation of this interval. Can you think of other
interpretations that would also be correct?
This confidence interval came from a single sample, would we get
the same interval if we obtained a different set of...

Question 2
a. Find the point estimate of the average systolic pressure of
all female in the population. [3 marks]
b. Construct the 95% confidence interval of the average systolic
pressure of all female in the population. Briefly explain the
confidence interval. [6 marks]
c. Determine the margin of error of estimate for part (b). [2
marks]
d. Find the 98% confidence interval of the average systolic
pressure of all female in the population. What conclusion can be
drawn from...

The focus this week is on confidence intervals. Utilize the
following information and answer the questions below: A 95%
confidence interval obtained from a sample of 100 outpatients for
the true population mean normal mean systolic blood pressure is
given by (114 mmHG, 120 mmHG).
Provide a correct interpretation of this interval. Can you
think of other interpretations that would also be correct?
This confidence interval came from a single sample, would we
get the same interval if we obtained...

I appreciate you taking the time to answer my question today,
please answer as many as you can, thank you.
Question 1 2 pts
(CO6) From a random sample of 55 businesses, it is found that
the mean time that employees spend on personal issues each week is
4.9 hours with a standard deviation of 0.35 hours. What is the 95%
confidence interval for the amount of time spent on personal
issues?
(4.84, 4.96)
(4.83, 4.97)
(4.81, 4.99)
(4.82, 4.98)...

sample of size n=44 drawn from a population with σ=7.5 has
x¯=17.9. Find a 92% confidence interval for the population mean by
completing each of the following in turn. Round all your answers to
the nearest hundredth.
x¯=
c=
zc=
E=
Confidence interval is ( , )
E = 1.97866819879157
The systolic blood pressure (SBP) of a certain population is
normally distributed with standard deviation 6 mmHg. A sample of 24
members of this population was found to have an...

can I have solutions, please
A random sample of 144 observations has a mean of 20, a median
of 21, and a mode of 22. The population standard deviation is known
to equal 4.8. The 95.44% confidence interval for the population
mean is
a. 15.2 to 24.8
b. 19.200 to 20.800
c. 19.216 to 20.784
d. 21.2 to 22.8
When the level of confidence decreases, the margin of error
stays the same
becomes smaller
becomes larger
becomes smaller or larger,...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 24 minutes ago

asked 24 minutes ago

asked 34 minutes ago

asked 37 minutes ago

asked 41 minutes ago

asked 52 minutes ago

asked 53 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago