A manufacturer of fly sprays wishes to compare two new concoctions, I and II. Two rooms...
A manufacturer of fly sprays wishes to compare two new concoctions, I and II. Two rooms of equal size, each containing 1,000 flies, are employed in the experiment, one treated with fly spray I and the other treated with an equal amount of fly spray II. A total of 825 and 760 flies succumbs to sprays I and II, respectively.
- Estimate the difference in the rate of kill for the two sprays when used in that environment (i.e., construct a 95% confidence interval for the difference).
P1=8251000=0.825, P2=7601000=0.760
P1-P2±1.96P11-P1n1-P21-P2n2=(0.0295, 0.1003)?
- Explain what the 95% confidence interval means.
The confidence interval does not contain zero, so it can be concluded that 95% cannot be found within this range of the data given?
Homework Answers
Add Answer to:
A manufacturer of fly sprays wishes to
compare two new concoctions, I and II. Two rooms...
I am interested in determining which sex, male or female, is more likely to have a...
I am interested in determining which sex, male or female, is more likely to have a tattoo. I collected data from 240 females and 215 males. 100 of the females and 67 of the males reported having at least one tattoo. I fed the data into Statistix and the following printout was produced. Hypothesis Test Two Proportions Sample Size Successes 240 100 215 67 Sample 1 Sample 2 Difference Proportion 0.41667 0.31163 0.10504 Null Hypothesis: P1 = P2 Alternative Hyp:...
1. Identify the test statistic. Z=_____(Round to two decimal places as needed.) Identify the P-value. P=_____(Round...
1.
Identify the test
statistic.
Z=_____(Round to two decimal places as needed.)
Identify the P-value.
P=_____(Round to three decimal places as needed.)
What is the conclusion based on the hypothesis test?
The P-value is (1)_____ the significance level of α=0.05, so
(2)_____ the null hypothesis. There (3)_____ evidence to warrant
rejection of the claim that women and men have equal success in
challenging calls.
b. Test the claim by constructing an appropriate confidence
interval.
The 95% or 99% confidence interval...
A quality control inspector is interested in comparing two concreting companies with respect to overall quality...
A quality control inspector is interested in comparing two concreting companies with respect to overall quality of their work. One measure of quality is whether or not the concrete that has been poured is at least 15 centimeters (cm) thick. The inspector has recorded details for jobs from both companies and is now interested in whether the companies differ with respect to this measure of quality. Let p1 denote the true proportion of times that Company 1 will fail to...
I need help with the first two please and Is the last one correct? A survey...
I need help with the first two
please and Is the last one correct?
A survey asked, "How many tattoos do you currently have on your body?" Of the 1215 males surveyed, 182 responded that they had at least one tattoo. Of the 1033 females surveyed, 135 responded that they had at least one tattoo. Construct a 90% confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females...
(11-13] The information below is based on independent simple random samples taken from two normally distributed...
(11-13] The information below is based on independent simple random samples taken from two normally distributed populations having equal variances. Based on the sample information, answer the following questions about the difference between two population means. ni = 13 n2 = 12 X 1 = 51 i , = 58 S = 6 S2 = 5 11) (1 point) The parameter of interest could be: a. X1-X2 b. H1-42 C. P1-P2 d. Other, please specify: 12) (1 point) Your friend...
I am interested in determining which sex, male or female, is more likely to have a tattoo. I collected data from 240 females and 215 males. 100 of the females and 67 of the males reported having at least one tattoo. I fed the data into Statistix and the following printout was produced. Hypothesis Test Two Proportions Sample Size Successes 240 100 215 67 Sample 1 Sample 2 Difference Proportion 0.41667 0.31163 0.10504 Null Hypothesis: P1 = P2 Alternative Hyp:...
1.
Identify the test
statistic.
Z=_____(Round to two decimal places as needed.)
Identify the P-value.
P=_____(Round to three decimal places as needed.)
What is the conclusion based on the hypothesis test?
The P-value is (1)_____ the significance level of α=0.05, so
(2)_____ the null hypothesis. There (3)_____ evidence to warrant
rejection of the claim that women and men have equal success in
challenging calls.
b. Test the claim by constructing an appropriate confidence
interval.
The 95% or 99% confidence interval...
I need help with the first two
please and Is the last one correct?
A survey asked, "How many tattoos do you currently have on your body?" Of the 1215 males surveyed, 182 responded that they had at least one tattoo. Of the 1033 females surveyed, 135 responded that they had at least one tattoo. Construct a 90% confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females...
(11-13] The information below is based on independent simple random samples taken from two normally distributed populations having equal variances. Based on the sample information, answer the following questions about the difference between two population means. ni = 13 n2 = 12 X 1 = 51 i , = 58 S = 6 S2 = 5 11) (1 point) The parameter of interest could be: a. X1-X2 b. H1-42 C. P1-P2 d. Other, please specify: 12) (1 point) Your friend...
Most questions answered within 3 hours.
-
A graduate student is conducting research in psychology and
needs to obtain the IQ scores of...
asked 13 minutes ago -
R2.84: There are 2 defective products in a production lot of 10.
An inspector randomly selected...
asked 1 hour ago -
Consider the following equilibrium system: COCl2(g) CO(g) +
Cl2(g) A 10.00 L evacuated flask is filled...
asked 2 hours ago -
1) What are the two distinct steps that one needs to perform
when developing a data...
asked 2 hours ago -
2) Write a C++ program that uses a class called “Degree” to
obtain the trigonometric
values...
asked 3 hours ago -
1. In eukaryotic cells the genomes of
&
asked 3 hours ago -
The standard enthalpy of propanol (C3H7OH) is -303.0 kJ/mol.
Compute both of the
gross and net...
asked 3 hours ago -
Why PWM using H-bridge for control motor speed is more power
effiecient than the linear amplifier...
asked 3 hours ago -
In 1999, Carly Fiorina famously said,"I hope that we are at a
point that everyone is...
asked 3 hours ago -
Individuals in a species of moth vary in wing color from white to
black, but all...
asked 3 hours ago -
The following standards for variable manufacturing overhead have
been established for a company that makes only...
asked 3 hours ago -
The United States government wanted to determine what proportion
of Americans approve of the current president,...
asked 4 hours ago