Question
In: Statistics and Probability
For a study conducted by the research department of a pharmaceutical company, 295 randomly selected individuals...
For a study conducted by the research department of a pharmaceutical company, 295 randomly selected individuals were asked to report the amount of money they spend annually on prescription allergy relief medication. The sample mean was found to be $17.60 with a standard deviation of $5.70. A random sample of 235 individuals was selected independently of the first sample. These individuals reported their annual spending on non-prescription allergy relief medication. The mean of the second sample was found to be $18.40 with a standard deviation of $4.40 . As the sample sizes were quite large, it was assumed that the respective population standard deviations of the spending for prescription and non-prescription allergy relief medication could be estimated as the respective sample standard deviation values given above. Construct a 95% confidence interval for the difference between the mean spending on prescription allergy relief medication () and the mean spending on non-prescription allergy relief medication (). Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. What is the lower limit of the 95% confidence interval? What is the upper limit of the 95% confidence interval?
Solutions
orchestra answered 1 year agoRelated Solutions
A study conducted by the research department of a pharmaceutical company claims that the annual spending...
A study conducted by the research department of a pharmaceutical
company claims that the annual spending (per person) for
prescription drugs for allergy relief,
μ1
, is greater than or equal to the annual spending (per person)
for non-prescription allergy relief medicine,
μ2
. A health insurance company conducted an independent study and
collected data from a random sample of
225
individuals for prescription allergy relief medicine. The sample
mean is found to be
17.5
dollars/year, with a sample standard...
A study was conducted on a sample randomly selected from city A. The results are presented...
A study was conducted on a sample randomly selected from
city A. The results are presented in
the table. Based on the information in the table answer
the below questions:
Age groups Number of participants Proportion of female
Relative frequency of
participants
15 years or younger 10 0.4
16-25 years 25 0.6
26-30 years 10 1.0
31 years or older 2 1.0
Are the age groups mutually exclusive?
Based on the number of participants, can you argue for
or against...
In a recent survey conducted by Pew Research, it was found that 156 of 295 adult...
In a recent survey conducted by Pew Research, it was found that
156 of 295 adult Americans without a high school diploma were
worried about having enough saved for retirement. Does the sample
evidence suggest that a majority of adult Americans without a high
school diploma are worried about having enough saved for
retirement? Use a 0.05 level of significance.
State the null and alternative hypothesis
What type of hypothesis test is to be used?
What distribution should be used...
For a new study conducted by a fitness magazine, 240 females were randomly selected. For each,...
For a new study conducted by a fitness magazine,
240
females were randomly selected. For each, the mean daily calorie
consumption was calculated for a September-February period. A
second sample of
230
females was chosen independently of the first. For each of them,
the mean daily calorie consumption was calculated for a
March-August period. During the September-February period,
participants consumed a mean of
2385.3
calories daily with a standard deviation of
206
. During the March-August period, participants consumed a...
For a new study conducted by a fitness magazine,285 females were randomly selected. For each, the...
For a new study conducted by a fitness magazine,285 females were
randomly selected. For each, the mean daily calorie consumption was
calculated for a September-February period. A second sample of 275
females was chosen independently of the first. For each of them,
the mean daily calorie consumption was calculated for a
March-August period. During the September-February period,
participants consumed a mean of 2383.5 calories daily with a
standard deviation of 208. During the March-August period,
participants consumed a mean of...
For a new study conducted by a fitness magazine, 270 females were randomly selected. For each,...
For a new study conducted by a fitness magazine, 270 females
were randomly selected. For each, the mean daily calorie
consumption was calculated for a September-February period. A
second sample of 285 females was chosen independently of the first.
For each of them, the mean daily calorie consumption was calculated
for a March-August period. During the September-February period,
participants consumed a mean of 2387.2 calories daily with a
standard deviation of 216. During the March-August period,
participants consumed a mean...
A researcher at a medical college conducted a study of 60 randomly selected male soccer players...
A researcher at a medical college conducted a study of 60
randomly selected male soccer players and concluded that frequently
"heading" the ball in soccer lowers players' IQs. The soccer
players were divided into two groups, based on whether they
averaged 10 or more headers per game.
Mean IQs were reported in the article, but the sample sizes and
standard deviations were not given. Suppose that these values were
as given in the accompanying table.
n
Sample
Mean
Sample
sd...
For a new study conducted by a fitness magazine, 240 females were randomly selected. For each,...
For a new study conducted by a fitness magazine,
240
females were randomly selected. For each, the mean daily calorie
consumption was calculated for a September-February period. A
second sample of
210
females was chosen independently of the first. For each of them,
the mean daily calorie consumption was calculated for a
March-August period. During the September-February period,
participants consumed a mean of
2385.5
calories daily with a standard deviation of
222
. During the March-August period, participants consumed a...
A study is conducted on 8,000 individuals free of diabetes and 8,000 individuals with diabetes. The...
A study is conducted on 8,000 individuals free of diabetes and
8,000 individuals with diabetes. The investigators are looking to
determine if a newly marketed drug may prevent diabetes. Among
patients with diabetes, 1,000 individuals received the new drug.
Among patients without diabetes, 2,000 individuals received the
drug.
4a. Construct a 2 by 2 table
displaying the combination of diabetics/non-diabetics who are
exposed/not exposed.
4b. Calculate an odds ratio and
provide an interpretation
4c. Calculate the relative risk and
provide...
The research department of an insurance company conducted a survey of the cause of automobile accidents...
The research department of an insurance company conducted a
survey of the cause of automobile accidents in the last calendar
year. A random sample of 200 policies written on single persons
revealed that 60 had been in at least one accident. A similar
survey of 300 policies written on married persons revealed that 75
had been in at least one accident. At the .05 level of
significance, is there a significant difference in the proportion
of the population of single...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Suppose Rialto is the only movie cinema in a small college town, so it is essentially...
- With VMI, members of the supply chain share planning, demand, forecasting, and inventory information.
- Large lots are desirable in supply chain coordination despite increasing holding costs.
- ***Convert the C++ to Python*** #include <iostream> using std::cout; using std::cin; using std::endl; int charClass; char...
- Make-or-Buy Decision Fremont Computer Company has been purchasing carrying cases for its portable computers at a...
- The following costs were incurred for the single product produced during the first year of operations...
- Non-constant growth model: Do=$2.00 required return on equity= 5% g= 9% n=1,2 g=7% n=3,4 g=3% n=5...
ADVERTISEMENT