Question

The owner of a local clothes shop wants to know if there is a difference between the average ages of males and females customers. He randomly samples 42 men and 44 women customers this month. He finds the average age of the men to be 29.07 with a standard deviation of 5.343. The average age of the women was 32.68 with a standard deviation of 9.656. Is there evidence of a difference between the mean ages for 2 genders?

Answer #1

The owner of a local golf course wants to examine the difference
between the average ages of males and females that play on the golf
course. Specifically, he wants to test is if the average age of
males is greater than the average age of females. Assuming males
are considered group 1 and females are group 2, this means the
hypotheses he wants to tests are as follows: Null Hypothesis: μ1 ≤
μ2, Alternative Hypothesis: μ1 > μ2. He randomly...

The owner of a local golf course wants to estimate the
difference between the average ages of males and females that play
on the golf course. He randomly samples 30 men and 26 women that
play on his course. He finds the average age of the men to be
49.844 with a standard deviation of 5.208. The average age of the
women was 35.237 with a standard deviation of 5.573. He uses this
information to calculate a 95% confidence interval...

The owner of a local golf course wants to estimate the
difference between the average ages of males and females that play
on the golf course. He randomly samples 12 men and 10 women that
play on his course. He finds the average age of the men to be 30.81
with a standard deviation of 5.071. The average age of the women
was 46.19 with a standard deviation of 11.982. Construct a 95%
confidence interval to estimate the difference of...

The owner of a local golf course wants to examine the difference
between the average ages of males and females that play on the golf
course. Specifically, he wants to test if the average age of males
is different from the average age of females. If the owner conducts
a hypothesis test for two independent samples and calculates a
p-value of 0.3318, what is the appropriate conclusion? Label males
as group 1 and females as group 2.
Question 4 options:...

The owner of a local golf course wants to estimate the
difference between the average ages of males and females that play
on the golf course. He randomly samples 25 men and 28 women that
play on his course. He finds the average age of the men to be
36.105 with a standard deviation of 5.507. The average age of the
women was 48.973 with a standard deviation of 5.62. He uses this
information to calculate a 90% confidence interval...

The owner of a local supermarket wants to estimate the
difference between the average number of gallons of milk sold per
day on weekdays and weekends. The owner samples 6 weekdays and
finds an average of 234.51 gallons of milk sold on those days with
a standard deviation of 33.997. 12 (total) Saturdays and Sundays
are sampled and the average number of gallons sold is 343.53 with a
standard deviation of 48.353. Construct a 95% confidence interval
to estimate the...

A researcher wants to assess if there is a difference in the
average age of onset of
a type of kidney disease for men and women. Let the population 1
mean be the
average age of onset for women and the population 2 mean be the
average age
of onset for men. A random sample of 27 women with the disease
showed an
average age of onset to be 81 years, with a sample standard
deviation of 13.5
years. A...

1. You are interested in whether the average lifetime of
Duracell AAA batteries is less than the average lifetime of
Energizer AAA batteries. You lay out your hypotheses as follows:
Null Hypothesis: μ1 ≥ μ2, Alternative
Hypothesis: μ1 < μ2 (Duracell = Group 1,
Energizer = Group 2). You perform an experiment on 20 randomly
selected Duracell AAA batteries and 40 randomly selected Energizer
AAA batteries and test them using a battery drainer. The Duracells
had an average lifetime of...

Suppose a researcher is interested in answering the following
question: Is there a difference between the mean body temperatures
for men and women? He collects data on body temperature and gender
from a random sample of 130 men and women. The data collected is
shown in the table below. Calculate a 95% confidence interval to
answer the researcher’s question.
Mean
Standard Deviation
Sample Size
Males
98.105
0.699
65
Females
98.394
0.743
65
Based on your confidence interval, is there a...

Suppose you are a civil engineer, specializing in traffic volume
control for the City of Grand Rapids. Your department has been
receiving a multitude of complaints about traffic wait times for a
certain intersection in the heart of downtown. To see if these
claims are valid, you want to monitor the true average wait time at
that intersection. Over the course of a few months, you record the
average number of minutes a car waits at the intersection between
4:00...

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