Homework Answers
Add Answer to:
approximately what is the size 1 standard deviation with zinc?with
placebo?
1-5. Consider the following data...
volunteers who had developed a cold within the previous 24 hours were randomized to take either zinc or placebo lozenges...
volunteers who had developed a cold within the previous 24 hours were randomized to take either zinc or placebo lozenges everu 2 to 3 hours until their cold symptoms were gone. Twenty five participants took zinc lozenges and 23 participants took placebo lozenges. The mean overall duration of symptoms for the zinc lozenge group was 4.5 days and the standard deviation of overall duration of symptoms was 1.6 days. For the placebo group, the mean overall duration of symptoms was...
For a random sample of 36 data pairs, the sample mean of the differences was 0.72....
For a random sample of 36 data pairs, the sample mean of the differences was 0.72. The sample standard deviation of the differences was 2. At the 5% level of significance, test the claim that the population mean of the differences is different from 0. (a) Is it appropriate to use a Student's t distribution for the sample test statistic? Explain. No, the sample size is not larger than 30. Yes, the sample size is larger than 30. No, the...
Consider the following sample data with mean and standard deviation of 177 and 7.3, respectively. (You...
Consider the following sample data with mean and standard deviation of 177 and 7.3, respectively. (You may find it useful to reference the appropriate table: chi-square table or F table) class Frequency Less than 10 25 10 up to 20 20 up to 30 86 72 30 or more 20 n 203 a. Using the goodness-of-fit test for normality, specify the competing hypotheses in order to determine whether or not the data are normally distributed. OHo: The data are normally...
Consider a bell-shaped symmetric distribution with mean of 128 and standard deviation of 3. Approximately what...
Consider a bell-shaped symmetric distribution with mean of 128 and standard deviation of 3. Approximately what percentage of data lie between 119 and 128? A)68% B)99.7% C)49.85% D)47.5% E)95%
So this is what I got as my Standard Deviation after plugging in the numbers: So...
So this is what I got as my
Standard Deviation after plugging in the numbers:
So I Subtracted the two Standard Deviations (85.36-83.83)=1.53,
but that is not the answer apparently. What am I doing wrong?
A supermarket chain wants to know if their "buy one, get one free" campaign increases customer traffic enough to justify the cost of the program. For each of 10 stores they select two days at random to run the test. For one of those days...
Problem 3. (1 point) Consider the following data set. Find the mean and standard deviation. Data...
Problem 3. (1 point) Consider the following data set. Find the mean and standard deviation. Data set: 37, 78, 69, 38, 59, 26,51 Mean: Standard deviation: Note: You can earn partial credit on this problem.
1. Among various ethnic groups, the standard deviation of heights is known to be approximately three...
1. Among various ethnic groups, the standard deviation of heights is known to be approximately three inches. Construct a 90% confidence interval for the mean height of male Russians based on the sample size forty where the sample mean was 68 includes and the sample standard deviation is 3.32 inches. SHOW CALCULATOR INPUT THANK YOU 2. Suppose that an accounting firm does a study to determine the time needed to complete one person's tax forms. It randomly surveys 50 people....
9. Calculate the standard deviation of the class count data. For full credit you must show...
9. Calculate the standard deviation of the class count data. For full credit you must show all of your work. The standard deviation should be no more than two significant figures. (15 pts) SD = . Sxa-)3 1-1 Write the meant standard deviation: L(2pts) Write the range of the standard deviation about the mean (3pts) 10. How precise were the counts? Explain using the standard deviation calculated. How does sample size contribute to a smaller standard deviation? (Spts) 11. Use...
14. Selecting the sample size to estimate a proportion Aa Aa Standard Normal Mean-0 Standard Deviation-1...
14. Selecting the sample size to estimate a proportion Aa Aa Standard Normal Mean-0 Standard Deviation-1 5000 2500 2500 2 ?? 0.674 0.674 The Council of Economic Advisers is conducting a study to estimate the proportion of U.S. households that are eligible for the earned income tax credit. The project manager wants to estimate the proportion to within 0.03 with 95% confidence, and the project manager believes that p will turn out to be approximately 0.13. A sample size no...
Consider the following data from two independent populations (with unequal variances). Sample Standard Deviation Sample Size...
Consider the following data from two independent populations (with unequal variances). Sample Standard Deviation Sample Size Sample #1 18 10 Sample #2 12 12 If an independent samples t-test is to be conducted, the appropriate degrees of freedom to use is? *****Answer is not 20****
For a random sample of 36 data pairs, the sample mean of the differences was 0.72. The sample standard deviation of the differences was 2. At the 5% level of significance, test the claim that the population mean of the differences is different from 0. (a) Is it appropriate to use a Student's t distribution for the sample test statistic? Explain. No, the sample size is not larger than 30. Yes, the sample size is larger than 30. No, the...
Consider the following sample data with mean and standard deviation of 177 and 7.3, respectively. (You may find it useful to reference the appropriate table: chi-square table or F table) class Frequency Less than 10 25 10 up to 20 20 up to 30 86 72 30 or more 20 n 203 a. Using the goodness-of-fit test for normality, specify the competing hypotheses in order to determine whether or not the data are normally distributed. OHo: The data are normally...
So this is what I got as my
Standard Deviation after plugging in the numbers:
So I Subtracted the two Standard Deviations (85.36-83.83)=1.53,
but that is not the answer apparently. What am I doing wrong?
A supermarket chain wants to know if their "buy one, get one free" campaign increases customer traffic enough to justify the cost of the program. For each of 10 stores they select two days at random to run the test. For one of those days...
Problem 3. (1 point) Consider the following data set. Find the mean and standard deviation. Data set: 37, 78, 69, 38, 59, 26,51 Mean: Standard deviation: Note: You can earn partial credit on this problem.
9. Calculate the standard deviation of the class count data. For full credit you must show all of your work. The standard deviation should be no more than two significant figures. (15 pts) SD = . Sxa-)3 1-1 Write the meant standard deviation: L(2pts) Write the range of the standard deviation about the mean (3pts) 10. How precise were the counts? Explain using the standard deviation calculated. How does sample size contribute to a smaller standard deviation? (Spts) 11. Use...
14. Selecting the sample size to estimate a proportion Aa Aa Standard Normal Mean-0 Standard Deviation-1 5000 2500 2500 2 ?? 0.674 0.674 The Council of Economic Advisers is conducting a study to estimate the proportion of U.S. households that are eligible for the earned income tax credit. The project manager wants to estimate the proportion to within 0.03 with 95% confidence, and the project manager believes that p will turn out to be approximately 0.13. A sample size no...
Most questions answered within 3 hours.
-
In a multiple regression analysis, two independent variables are
considered, and the sample size is 26....
asked 1 hour ago -
FOR JAVA:
Summary: Write a program to assess password stringency.
The solution should be named Password.java....
asked 1 hour ago -
2. (1.5pt) Calculate [ClO-] in a 6.00% bleach solution. A 6.00%
bleach solution contains 6.00g of...
asked 3 hours ago -
Protons in cosmic rays have been observed with kinetic energies
as large as 1.0×1020eV.
How fast...
asked 4 hours ago -
How do you explain that it is not fair for teachers to verbally
abuse you over...
asked 4 hours ago -
Ang Electronics, Inc., has developed a new HD DVD. If the HD DVD
is successful, the...
asked 4 hours ago -
which of these substances cannot behave as a lewis base in an aq
solution
a- Co...
asked 4 hours ago -
Below are some of Toyota’s (an automotive manufacturer) costs to
manufacture a car: I. Depreciation of...
asked 4 hours ago -
A random sample of 40 cups of coffee from a vending machine had
a sample mean...
asked 5 hours ago -
The mercury in a fish sample is determined to be 1.80, 1.58 and
1.64 ppm. Calculate...
asked 5 hours ago -
Suppose a photon is equally likely to be found anywhere in an
interval of 28.5 cm...
asked 5 hours ago -
Suppose the following is a divide-and-conquer algorithm for some
problem.
"Make the input of size n...
asked 5 hours ago