I Completed the first half, but I am struggling with the questions below. They are multiple choice. Objective: Apply hypothesis testing to different populations and samples in business research situations. 5. One characteristic of any Student's t distribution is a. It is right skewed. b. As n increases, the t-di
A production line operates with a mean filling weight of 500 grams per container. Over filling or under filling presents a serious problem and when detected requires the operator to shut down the production line to readjust the filling mechanism. From past data, a population standard deviation = 25 grams is assumed. A quality co
MCQs for Statistics and Hypothesis Testing: New drug, tree trunk diameters, and money spent on business dinners.
If you choose to solve these problems, please show the steps and formulas used. 1. A pharmaceutical company is testing the effectiveness of a new drug for lowering cholesterol. As part of this trial, they wish to determine whether there is a difference between the effectiveness for women and for men. At = .05, what is
1) Two gasoline additives will be tested to determine their impact on miles per gallon for passenger cars. In the experiment, each car was tested with both gasoline additives. Use a level of significance α = 0.05 and the rank sum test Wilcoxon test whether any significant difference in the two additives.
Sample Item Original Supplier New Supplier 1 0.374 0.391 2 0.387 0.375 3 0.359 0.365 4 0.391 0.360 5 0.390 0.366 6 0.361 0.378 7 0.376 0.377 8 0.371 0.364 9 0.373 0.332 10 0.364 0.343 11 0.390 0.378 12 0.384 0.401 13 0.384 0.382 14 0.383 0.381 15 0.381 0.363 16 0.369 0.371 17 0.361 0.352 18 0.376 0.393 19 0.38
The maker of refrigerators buys bolts from two suppliers, and it is very important that the mean widths of the bolts received from both suppliers are equal since they must be used interchangeably. The refrigerator maker receives a large shipment of volts from each supplier and draws a random sample of 49 bolts from each shipmen
A lab technician is tested for her consistency by taking multiple measurements of cholesterol levels from the same blood sample. The target accuracy is a variance in measurements of 1.2 or less. If the lab technician takes 16 measurements and the variance of the measurements in the sample is 2.2, does this provide enough evide
See attached file for data. 10.28 Multiple myeloma, or blood plasma cancer, is characterized by increased blood vessel formulation (angiogenesis) in the bone marrow that is a prognostic factor in survival. One treatment approach used for multiple myeloma is stem cell transplantation with the patient's own stem cells. The fo
9.69 Late payment of medical claims can add to the cost of health care. An article (M. Freudenheim, "The Check in Not in the Mail," The New York Times, May 25, 2006, pp.C1, C6) reported that for one insurance company, 85.1% of the claims were paid in full when first submitted. Supposed the insurance company developed a new pay
True or False: The t distribution is used to develop a confidence interval estimate of the population mean when the population standard deviation is unknown. True or False: The confidence interval estimate of the population proportion is constructed around the sample proportion. True or False: The F test used for testing t
Results from previous studies showed 79% of all high school seniors from a certain city plan to attend college after graduation. A random sample of 200 high school seniors from this city reveals that 162 plan to attend college. Does this indicate that the percentage has increased from that of previous studies? Test at the 5%
1.A machine produces 5-inch nails. A sample of 12 nails was selected and their lengths determined. The results are as follows: 4.94 4.94 5.07 4.91 4.98 5.00 4.94 5.09 5.00 4.92 5.08 5.06 Assuming that a = 0.10, test the hypothesis that the population mean is equal to 5. ?State the null and alternate hypotheses ?&
Objective: Identify the formal hypothesis testing process. 1. If a null hypothesis is not rejected at the 0.10 level, it may be rejected at the 0.05 level. a. 0 True b. 0 False Objective: Perform a hypothesis test of one proportion. 2. The Roman Senate has become concerned about the loyalty of the army in Gaul com
A machine produces 5-inch nails. A sample of 12 nails was selected and their lengths determined. The results are as follows: 4.85 4.80 4.89 4.82 4.94 4.96 4.96 4.83 4.80 4.84 4.95 4.88 Assuming that = 0.10, test the hypothesis that the population mean is equal to 5. · State the null and alternate hypothe
Consider the following Hypothesis Testing: H0: δ1² = δ2² Ha: δ1² ≠ δ2² The sample size for sample 1 is 25, and for sample 2 are 21. The variance for sample 1 is 4.0 and for sample 2 is 8.2 a) at the confidence level of 0.98, what is your conclusion of this test? b) What is the confidence
The owner of a restaurant has just changed the delivery process in order to reduce the mean time between the order and completion of delivery from the current 25 minutes. In the past, the population standard deviation has been 6 minutes. A sample of 36 orders under the new delivery process results in a sample mean of 22.4 minu
Directions: Use the attached set of raw data to complete the following tasks. For tasks 1 through 4 please focus on New Mexico highway fatalities.. In task five you will be comparing New Mexico and U..S. highway fatalities. All work must be done by hand. You may use a calculator but only as an aid.. You must demonstrate tha
There are 5 questions and 1 SPSS problem attached. Please include in detail your responses. 1. Name six virtues and characteristics of problems and hypothesis. 2. Name some tips for identifying and developing formal research problems. 3. Describe the difference between Qualitative and Quantitative research.
There are four questions to the problem attached. The questions have very detailed sections that are required. Please make sure to include all questions fully if you accept the assignment. Please use SPSS. Currently at a company the income comes from 15 workers to generate billable hours. The 15 employees do Psycho-s
Question 5 Use the traditional method to test the given hypothesis. Assume that the population is normally distributed and that the sample has been randomly selected A machine dispenses a liquid drug into bottles in such a way that the standard deviation of the contents is 81 milliliters. A new machine is tested on a sample
Many grocery stores have installed self checkout systems. Below is the number of customers using the service for a sample of 15 days at the Wal-Mart in Boonton, 120 108 120 114 118 91 118 92 104 104 105 112 97 118 108 117 Is it reasonable to assume that the mean number of customers using self che
Use n=25 for each problem where necessary. An accountant randomly selects (60+n) general accounts payable and examines them to determine whether they are correct. Six accounts contained errors. Construct a 98% confidence interval for the true proportion of general accounts payable that contain errors. Com
Please see the attachment. Instructions: ? Follow the directions for each problem. ? Use Minitab for all the calculations. ? The data set is available in contents page of D2L in the Final Exam module called fall 2009.MTW. ? Label each printout of your Minitab session according to the problem and part of that problem.
NClinics, Inc. is a specialty e-tailer that sales clothing and accessories for nurses and operates 87 catalog Web sites on the Internet. Kevin Conn, Sales Director, feels that the style (color scheme, graphics, fonts, etc.) of a Web site may affect its sales. He chooses three levels of design style (neon, old world and sophist
The US Department of Agriculture reports that the mean cost of raising a child from birth to age 2 in a rural area is $8,390. You believe that this value is incorrect, so you select a random sample of 900 children (age 2) and find that the mean cost is $8,275 with a standard deviation of $1,540. At α = 0.05, is there enough
1. A sample of 25 households in Prolific City revealed a mean of 7.5 residing members and a standard deviation of 3. If the mean household size for the nation is 4.2, what is the value of the test statistic? a. 27.5 b. 5.5 c. 1.1 d. 0.55 2. A college base
See attached data file. A wholesale furniture retailer stores in-stock items at a large warehouse located in Tampa, Florida. In early 1992, a fire destroyed the warehouse and all the furniture in it. After determining the fire was an accident, the retailer sought to recover costs by submitting a claim to its insurance company
Bushels of Corn Crop researchers plant 15 plots with a new variety of corn. The yields in bushels per acre are: 138.0 139.1 113.0 132.5 140.7 109.7 118.9 134.8 109.6 127.3 115.6 130.4 130.2 111.7 105.5 Assume that the standard deviation of the population is known to be σ = 10 bushels per acre QUESTIONS: 1. Wh
A researcher would like to determine if relaxation training will affect the number of headaches for chronic headache sufferers. For a week prior to training, each participant records the number of headaches suffered. Participants then receive relaxation training, and for the week following training the number of headaches is aga
Elementary Statistics 1. A researcher knows that the population mean among college students taking the social test is a "neutral" 100. (scores higher than 100are assumed to represent more conformity than average and those lower than 100 indicates less conformity). A random sample of 30 students was selected, and the followin