Question

The blood sugar levels after fasting for at least eight hours was measured for seven women in milligram per deciliter. The results were as follows 75, 77, 80, 90, 95, 100, 103. (A) Construct a 95% confidence interval for the population mean. Show all work. (B) Interpret the confidence interval.

Answer #1

A)

B) Interpretation :

Out of 100 samples drawn, mean blood sugar level lies between (78.49, 98.65) for 95 samples.

a. Nonpregnant women have an average fasting blood glucose level
of about 80 mg/100mL of blood. Researchers want to determine if
pregnancy causes a change in blood glucose level. They take a
random sample of 25 third trimester women and find their average
fasting blood glucose level is 75 mg/100mL with sample standard
deviation of 9.68. Find 90% and 95% confidence intervals for
average fasting blood glucose level of third trimester women.
b. Repeat the previous question, but this time...

The following table represents fasting blood glucose levels
measured in monozygotic twins who were raised apart. Each row
represents a separate pair of twins.
Set 1
102
102]
Set 2
92
93
Set 3
89
92
Set 4
95
90
Set 5
92
105
Set 6
96
94
For this question, computer and enter the broad-sense
heritability (H2) of fasting blood glucose to two
decimal places (0.xx).

In a study of maximal aerobic capacity, 12 women were used as
subjects, and their blood plasma volumes (in liters) were measured:
3.15, 2.99, 2.77, 3.12, 2.45, 3.85, 2.99, 3.87, 4.06, 2.94, 3.53,
3.20. Assume that these are observations of a normally distributed
random variable X with mean ? and variance ?2.
Give the values of the point estimates of ?, ?2, and
?.
Find a 90% and a 95% confidence intervals for ?. Interpret and
compare.
Find a 95%...

High Cholesterol: A group of eight individuals with high
cholesterol levels were given a new drug that was designed to lower
cholesterol levels. Cholesterol levels, in milligrams per
deciliter, were measured before and after treatment for each
individual, with the following results: Individual Before After 1
253 202 2 237 213 3 282 184 4 276 205 5 246 179 6 258 209 7 293 181
8 276 187 Send data to Excel Part: 0 / 20 of 2 Parts...

The level of various substances in the blood of dialysis
patients is of concern because kidney failure can lead to
nutritional problems. A researcher performed blood test on several
dialysis patients on six consecutive clinic visits. One variable
measured was the level of phosphate in the blood. Phosphate levels
for an individual tend to vary normally over time. The data on one
patient, in milligrams of phosphate per deciliter (mg/dl) of blood,
are shown below:
6.1 5.9 5.4 6.2 6.4...

A manufacturer produces smartwatches that have a mean life of at
least 200 hours when the production process is working properly.
Based on past experience, it is known that the population standard
deviation is 25 hours and the smartwatch life is normally
distributed. The operations manager selects a random sample of 25
smartwatches, and the mean life of smartwatchers is recorded.
d. State the appropriate test used and reason.
Determine the appropriate test statistic. Keep at least 2 decimal
places....

Myocardial blood flow (MBF) was measured for two groups of
subjects after five minutes of bicycle exercise. The normoxia
(“normal oxygen”) group was provided normal air to breathe whereas
the hypoxia group was provided with a gas mixture with reduced
oxygen to simulate high altitude. The results (ml/min/g) are shown
in the table below.
NORMOXIA X HYPOXIA Y
3.45 6.37
3.09 5.69
3.09 5.58
2.65 5.27
2.49 5.11
2.33 4.88
2.28 4.68
2.24 3.50
n 8 8
Sample mean 2.7...

1. According to the Stern Marketing Group, 9
out of 10 professional women say that financial planning is more
important today than it was five years ago. Where do these women go
for help in financial planning? Forty-seven percent use a financial
advisor (broker, tax consultant, financial planner). Twenty-eight
percent use written sources such as magazines, books, and
newspapers. Suppose these figures were obtained by taking a sample
of 630 professional women who said that financial planning is more
important...

A study published in JAMA in 2004 examined past results of other
studies on bariatric surgery. Bariatric surgery is done to replace
the size of the stomach in various ways. It is typically used on
only obese patients, and one the traditional form of the surgery,
gastric bypass has a 1% mortality (death) rate caused by the
surgery. However, in the studies reporting on the effects of this
surgery on Type II diabetes, 1417 of 1846 diabetic patients
recovered completely...

A.) For this problem, carry at least four digits after the
decimal in your calculations. Answers may vary slightly due to
rounding.
A random sample of medical files is used to estimate the proportion
p of all people who have blood type B.
(a) If you have no preliminary estimate for p, how many
medical files should you include in a random sample in order to be
85% sure that the point estimate p? will be within a
distance of...

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