The null and alternate hypotheses are: H0: mean of 1 is equal to the mean of 2 H2: mean of 1 is not equal to the mean of 2 A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12. A random sample of 17 observations from the second population reveale
1) The manufacturer of the new subcompact Clipper claims that it will average "40 or more miles per gallon on the open road." Some of the competitors believe this claim is too high. To investigate, an independent testing agency is hired to conduct highway mileage tests. A random sample of 64 clippers showed their mean miles p
(See attached file for full problem description) --- According to the historical data, the life expectancy in the United States is equal to the life expectancy in the United Kingdom. A new study has been made to see whether this has changed. Records of individuals from the United States who died recently are selected at ran
(See attached file for full problem description with all charts) CHAP. 12 18. There are three hospitals in the Tulsa, Oklahoma, area. The following data show the number of outpatient surgeries performed at each hospital last week. At the .05 significance level, can we conclude there is a difference in the mean number of
We are doing a team project for our statistics class and our project is about "Math Anxiety". We are stuck on one question and the questions are "the teams will state the null and alternative hypotheses, and the theories that support these hypotheses, that will be tested." If you could please explain what they are asking for and
The null and alternate hypotheses are: The following paired observations show the number of traffic citations given for speeding by Officer Dhondt and Officer Meredith of the South Carolina Highway Patrol for the last five months. Day May June July August September Officer Dhondt 30
Most air travelers now use e-tickets. Electronic ticketing allows passengers to not worry about a paper ticket, and it costs the airline companies less to handle than a paper ticketing. However, in recent times the airlines have received complaints from passengers regarding their e-tickets, particularly when connecting flights a
A recent article in USA Today reported that a job awaits only one in three new college graduates. The major reasons given were an overabundance of college graduates and a weak economy. A survey of 200 recent graduates from your school revealed that 80 students had jobs. At the .02 significance level, can we conclude that a large
The Mac Burger restaurant chain claims that the waiting time of customers for service is normally distributed, with a mean of 3 minutes and a standard deviation of 1 minute. The quality-assurance department found in a sample of 50 customers at the Warren Road Mac Burger that the mean waiting time was 2.75 minutes. At the .05 sig
Please help me with the following problems. There are a few I'm having trouble with. Please use EXCEL and show me a step by step solution to give me a full understanding. Thanks a lot! #1 A financial analyst wants to compare the turnover rates, in percent, for shares of oil-related stocks versus other stocks, such as GE an
Please help me with the following 3 problems. There are only a few that I can't seem to figure out. Please use excel and show me a step by step solution to give me a full understanding. Thanks a lot! #1 The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before th
Provide an example of a situation from your personal or professional experience where an two-sample test of hypothesis of dependent samples would be useful in a decision-making process. How would the hypothesis statement read?
A recent article in the Wall Street Journal reported that the 30-year mortgage rate is now less than 6 percent. A sample of eight small banks in the Midwest revealed the following 30- year rates (in percent): 4.8 5.3 6.5 4.8 6.1 5.8 6.2 5.6 At the .01 significance level, can we conclude that the 30-year mortgage ra
Experience raising New Jersey Red chickens revealed the mean weight of the chickens at five months is 4.35 pounds. The weights follow the normal distribution. In an effort to increase their weight, a special additive is added to the chicken feed. The subsequent weights of a sample of five-month-old chickens were (in pounds): 4.
The management of White Industries is considering a new method of assembling its golf cart. The present method requires 42.3 minutes, on the average, to assemble a cart. The mean assembly time for a random sample of 24 carts, using the new method, was 40.6 minutes, and the standard deviation of the sample was 2.7 minutes. Using
The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles. The standard deviation of the mileage is 5,000 miles. The Crosset Truck Company bought 48 tires and found that the mean mileage for their trucks is 59,500 miles. Is Crosset's
The "Washington State Population Survey" is conducted biennially to support research on health care issues and other economic factors affecting Washington State residents. Data from the survey is publicly available and is used extensively in research by many organizations. See link for description of survey if you wish: http://
1. Work through a simple regression calculation using intrinsic job satisfaction and extrinsic job satisfaction. You may USE ALL 288 data points from the DataSet file in Unit 1 or you may select a group of 30 data points. You must provide the 30 data points that you used however or I will be unable to check your work and you wi
1. Name an application for the use of ANOVA. This can be in a professional setting, hobby, or something you find on the internet 2. What are some business situations where ANOVA would be more appropriate than a Z or T test? 3. Find an example of the use of a contingency table from the internet. Describe what it was test
(See attached file for full problem description with all symbols) 1. A coin-operated drink machine was designed to discharge a mean of ounces of coffee per cup. Suppose that we want to carry out a hypothesis test to see if the true mean discharge differs from . State the null hypothesis and the alternative hypothesis that
Provide an example of a situation from your personal or professional experience where an two-sample test of hypothesis of dependent samples would be useful in a decision-making process. How would the hypothesis statement read?
Provide an example of a situation from your professional experience where an independent two-sample test of hypothesis would be useful in the decision-making process. How would the hypothesis statement read?
A New England Journal of Medicine study found that a substantial portion of acute hospital care is unnecessary. The physicians who conducted the study reviewed the medical records of 1,132 patients hospitalized at six different locations across the country. Overall, 60% of the admissions were judged to be appropriate, 23% were d
2. Two groups, A and B, consist of 100 people each who have a disease. A serum is given to group A but not to group B (which is called the control group); otherwise, the two groups are treated identically. It is found that in groups A and B, 75 and 65 people respectively, recover from the disease. a. At a significance level of
An investment services company claims that the average annual return on stocks within a certain industry is 11.5%. An investor wants to test whether this claim is true and collects a random sample of 50 stocks in the industry of interest. He finds that the sample average annual return is 10.8% and that the sample standard deviat
The mean wage of workers in a certain industry over the whole country is $210 per week, with a standard deviation of $7.50. A sample of 100 workers from one large factory is found to have a mean wage of $208 per week. Are the workers in this factory different from the rest of the industry?
Fairfield homes is developing two parcels near Pigeon Fork, Tenn. In order to test different advertising approaches, they use different media to reach potential buyers. The mean annual family income for 75 people making inquires at the first development is $150,000, with a standard deviation of $40,000. A corresponding sample of
The management of discount furniture, a chain of discount furniture stores in the northeast, designed an incentive plan for salespeople. To evaluate this innovative plan, 12 Salespeople were selected at random, and their weekly incomes before and after the plan were recorded. Sid: before $320, after $340 Carol: before $290
The null and alternative hypotheses are: Ho:u1=u2 H1: u1=u2 A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12. a random sample of 17 observations from the second population revealed a sample mean of 342 and a sample standard deviation of 15. at t
I am still having problems figuring these out. I'm supposed to perform the Chi-Square. Could you walk me thru this step by step? Completely Confused PG533-EX 10 HMWK-CHISQUARE -GOODNESS OF FIT - UNEQUAL EXPECTED FREQUENCIES CV=7.824 The chief of security for the Mall of the Dakotas was directed to study the problem of missi