Statistics - Minimize Z = 1.80S + 2.20T
2) Minimize Z = 1.80S + 2.20T Subject to: 5S + 8T => 200 15S + 6T => 240 4S + 12T => 180 T => 10 S, T => 0 (a) What are the optimum values of the decision variables and Z?
Hypothesis Testing
BrainMass Solutions Available for Instant Download
The solution to Hypothesis testing of Mean: Five step method
1. Determine whether the hypothesis test for each claim is left-tailed, right-tailed, or two tailed. Explain your reasoning. Lung Cancer: A government report claims that the proportion of lung cancer cases that are due to smoking is 87% 2. Testing Claims. (a) write the claim mathematically and identify H0 and Ha. (b)
Determination of Rejection Region
A coin-operated coffee machine dispenses a preset amount of coffee. The vending company wants to know if the average amount dispensed is µ = 6 (H0, no adjustment needed) or is µ = 6 (Ha, requires adjustment). Which of the following is an appropriate rejection region for conducting the above test at significance level .05 if
Rising FAX Costs
Chapter Exercises 9.54 Faced with rising FAX costs, a firm issued a guideline that transmissions of 10 or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44
Sample Size of Purchase Amounts
Purchase Amounts for all Customers Shopping at a Local Supermarket on a Given Friday Customer Amount 1 $35.97 2 $52.23 3 $93.08 4 $2.90 5 $91.13 6 $150.69 4. Problem 4 contains data of the amount that customers spend in a supermarket on a specific Friday. Assume this data represents the pop
Statistics - Null and Alternate Hypothesis.
7. A fast-food franchiser is considering building a restaurant at a certain location. Based on financial analysis, a site is acceptable only if the number of pedestrians passing the location averages more than 100 per hour. A random sample of 50 hours produced a sample mean of 110 pedestrians per hour. Historical studies ha
Statistics - Population Means, Known and Unknown
C. Say a fast-food franchiser is considering building a restaurant in a local mall. According to franchise headquarters, a site is acceptable only if the number of pedestrians passing the location averages more than 100 per hour. A random sample of 40 hours produced a sample mean of 105 persons and a sample standard deviation o
Hypothesis Tests of Equality of means of two populations.
Data Analysis 32. Consider a random sample of 100 households from a middle-class neighborhood that was the recent focus of an economic development study conducted by the local government. Specifically, for each of the 100 households, information was gathered on each of the following variables: family size, location of th
One Sample Hypothesis Testing
Using ratio or interval numerical data from the data set attached, develop the following: 1. Develop a research question 2. Formulate a research hypothesis and null hypothesis 3. Decide the type of test and level of significance 4. Calculate the standard error 5. Find the critical region 6. Perform the hypothesis te
State your Null and Alternative hypothesis
Please state your null and alternative hypothesis for the following cases. Please explain how do you make that decision on which is alternative and which is null. Remember that it comes to the point that what a researcher would like to test for. For example, when I test to see if a sereal box weighs as it is stated, I am tes
Null Hypothesis, Alternate Hypothesis, Decision Rule...
For Exercises 1-3: (a) State the null hypothesis and the alternate hypothesis. (b) State the decision rule. (c) Compute the value of the test statistic. (d) What is your decision regarding H0? (e) What is the p-value? Interpret it. 1. The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage
Hypothesis, Null and Alternative, & P-values
Q1: What is a p-value in testing hypothesis? Q2: How does this p-value help us to decide to/not to reject a Null hypothesis? What might happen if we do not use this p-value in particular, when we are rejecting a Null hypothesis? Q3: What are the limits of these p-values to decide if we have made a right decision on reje
T tests, confidence intervals
1. Explain the difference between testing a single mean, testing the difference between two means from an "independent sample" and testing mean differences from a "dependent sample". 2. Choose a variable. You will be comparing the means of two groups to each other. Your sample will consist of 12 subjects in each group. You ma
Statistics -Show and explain five step hypothesis (Strategy)
1. A National retail chain has 7 different strategies (S1 to S7) to increase its sell. None of these strategies work all the time. In the past they have used these strategies equal number of times and the following table shows the number time each strategy worked successfully. At the significance level .05, examine if all of the
two-tail hypothesis test for the breaking strength of a certain
PROBLEM # 3 A certain type of cable was advertised as having a breaking strength of 1000 pounds. A test of XX pieces of this cable was conducted and the mean breaking strength of this sample was XXX pounds with a sample standard deviation of XX pounds. Conduct a two-tail hypotheses test at alpha = .05 to determine if this samp
Statistics - Test claim
16. A steel pipe fittings company claims that the yield strength of its non-tempered couplings is more variable than that of its tempered couplings. A random sample of nine tempered couplings has a standard deviation of 13.1 mega-pascals, and a similar sample of nine non-tempered couplings has a standard deviation of 25.4 mega-p
Hypothesis Test
A legal researcher is studying the age distribution of juries by comparing them with the overall age distribution of available jurors. The researcher claims that the jury distribution is different from the overall distribution; that is, there is a noticeable age bias in jury selection in this area.The table shows the number of j
Hypothesis Test
1. Given the following data from two independent samples from which the population standard deviation is known, conduct a two-tailed hypothesis test to determine if the first sample mean is smaller than the second sample mean, given a 0.01 level of significance. n1 = 42 n2 = 30 xbar1= 39 xbar2 = 25 sigma1=8 sigma2 = 6
Statistic distribution
9.54 Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a stand
Evaluate: Five Step Testing Hypothesis
The following sample data shows the quarterly earnings in millions for two US companies. Your research interest is finding if the average earnings for these companies are different. Justify your answer by doing a five step testing of the hypothesis at the 0.05-level of significance. Show all the steps of the calculations. Com
Theoretical Issues About Testing of Population Mean
How do hypothesis-testing procedures differ for the population mean when the population standard deviation is known or unknown? What is the relationship between two-sided hypothesis tests for means and confidence intervals? Why would the population variability and the sample size affects the power of a test? How do the leve
Central Limit Theorem and its implications in Hypothesis Testin
Q1: What do you remember from the CLT and it's implications? Please touch up on them. Q2: Please explain how this theory is used in testing hypothesis. Q3: What are confidence intervals telling us? Q4: What region under the normal curve corresponds to Researcher's confidence? Q5: What are the area under the 2 tai
Testing Claims and Identification
Testing Claims (a) Write the claim mathematically and identify Ho and Ha, (b) find the critical value(s) and identify the rejection region(s), (c) find the standardized test statistic, (d) decide whether to reject or fail to reject the null hypothesis, and (e) interpret the decision in the context of the original claim.
Deciding on a Distribution
Deciding on a Distribution, decide whether you should use a normal sampling distribution or a sampling distribution to perform the hypothesis test. Justify your decision. Then use the distribution to test the claim.Write a short paragraph about the results of the test and what you can conclude about the claim. 37. Gas Mile
Hypothesis testing of Mean: Microwave Repair Costs
Testing Claims, (a) write the claim mathematically and identify Ho and Ha. (b) find the critical value(s) and identify the rejection region(s). (c) find the standardized test statistic. (d) decide whether to reject or fail to reject the null hypothesis. (e) interpret the decision in the context of the original claim. For e
MSW
5 groups 7 values in each group if ssa= 60 and sst = 210, what is SSW. A. what is MSA. B. what is msw C. what is the value of the test statistic F? A. Construct a ANOVA summary table and fill in all values in the table B. At the 0.05 level of signifance what us the upper-tail critical value from the F distribution c. St
Statistics SPSS computation and interpretation
Cooling method for gas turbines. During periods of high electricit demand, especially during the hot summer months, the power output from a gas turbine engine can drop dramatically. One way to counter this drop in power is by cooling the inlet air to the gas turbine. An increasingly popular cooling method uses high pressure i
Hypothesis
To test the hypothesis that students who finish an exam first get better grades, the professor kept track of the order in which papers were handed in. The first 25 papers showed a mean score of 77.1 with a standard deviation of 19.6, while the last 24 papers handed in showed a mean score of 69.3 with a standard deviation of 24.
Testing Claims Using P-values
Problem: Using and Interpreting Concepts Testing Claims Using P-values (a) write the claim mathematically and identify Ho and Ha. (c) find the value. (d) decide whether to reject or fail to reject the null hypothesis. (e) interpret the decision in the context of the original claim. 33. Mathematics Assessment Tests In Ill
Using and Interpreting Concepts
Using and Interpreting Concepts Testing Claims Using P-values, (a) write the claim mathematically and identify Ho and Ha. (b) find the standardized test statistic and its corresponding area. (c) find the value. (d) decide whether to reject or fail to reject the null hypothesis. (e) interpret the decision in the context of