Given the following hypothesis: Ho: mo=400 H1:m1 is not equal to 400 For a random sample of 12 observations, the sample mean was 407 and the sample standard deviation is six. Use the 0.01, 0.50, or 0.10, significance level to determine if the null hypothesis should be rejected. What is the p-value?
Why the selection of the t statistic and what is the result and conclusion of your find? See attached file for full problem description.
SPSS computation and interpretation (T-Test) Rental card gasoline prices per gallon were sampled at eight major airports. Data for Hertz and National car rental companies follow: Airport Hertz National Boston Logan 1.55 1.56 Chicago O'Hare 1.62 1.59 Los Angeles 1.72 1.78 Miami 1.65 1.49
In Sweden, a scientific journal stated that the average woman is 69 inches tall, with a standard height deviation of 2 inches. What do you think the probability is the 1st woman I meet is taller than 70 inches? During my last trip there, I met 4 women and the average height of all 4 women was 71 inches. Using .05 signifi
Provide two examples of a t-test as well as a short explanation as to what a T-Test is. If a researcher were studying the effects of a teaching method on patient learning outcomes, how would the research question need to be worded to use a t-test to test for statistical differences? What type of data would need to be collect
Please explain and resolve the attached problem. Thanks! Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is = 0. Compute the value of the t test statistic. x 7 2 7 3 10 y 4 4 3 4 5 Use three decimal places
Ms Moline is the budget director for Nexus Media Inc. She is comparing travel costs for sales and the audit staff. She collected the following sample data: Sales Audit 131 130 135 102 146 129 165 143 136 149 142 120 139 At the .10 level of significance can she conclude that the daily expenses are greater for the
The Commercial Bank and Trust Company is studying the use of its automatic teller machines (ATMs). Of particular interest is whether young adults (under 25 years) use the machines more than senior citizens. To investigate further, samples of customers under 25 years of age and customers over 60 years of age were selected. The nu
You are concerned about wait times at the cash registers in the supermarket. You collect data and have a sample size of 10, which test would you use a Z or a T test and why? What is the major difference between a Z and a T test. (hint sample size and variability)
A random sample of 10 observations from one population revealed a sample mean of 23 and a sample deviation of 4. A random sample of 8 observations from another population revealed a sample mean of 26 and a sample standard deviation of 5. At the .05 significance level, is there a difference between the population means. (a)
Solar Energy in Different Weather: A student of the author lives in a home with a solar electric system. At the same time each day, she collected voltage readings from a meter connected to the system and the results are listed in the accompanying table. Use a).05 significance level to test the claim that the mean voltage reading
1. The new director of special programs in XYZ Corporation felt the customers were waiting too long to receive and complete forms needed to enroll in special programs. After collecting some data, Ms. Jones determined the mean wait time was 28 minutes. She felt this time period was excessive and she instituted new procedures to s
Exercise 14 (a) State the decision rule, (b) compute the pooled estimate of the population variance, (c) compute the test statistic, (d) state your decision about the null hypothesis, and (e) estimate the p-value. The null and alternate hypotheses are: A random sample of 15 observations from the first population revealed
1. You work for a soda company. Last year a large survey found that 50% like you diet soda. This year a spot survey of n=900 found that 54% liked the soda. The president of the company asks you if this is an improvement in market share? Do a 1 tail test with an alpha of 5%  What is the calculated z or t? what is the c
The president of the American Insurance Institute wants to compare the yearly costs of auto insurance offered by two leading companies. He selects a sample of 15 families, some with only a single insured driver, others with several teenage drivers, and pays each family a stipend to contact the two companies and ask for a price
Testing of mean and variance. See attached file for full problem description.
Comparison of profit from French store location and profit from German store locations using the independent sample student t test. See attached file for full problem description.
The liquid chlorine added to swimming pools to combat algae has a relatively short shelf life before it loses its effectiveness. Records indicate that the mean shelf life of a 5-gallon jug of chlorine is 2,10 hours (90 days). As an experiment, Holdlonger was added to the chlorine to find weather it would increase the shelf life.
A market analyst wants to determine the difference in the average price of a gallon of milk in Cleveland and New York. A telephone survey is conducted consisting of 31 randomly selected consumers in Cleveland. They are asked if they purchased a gallon of milk during the past 2 weeks. If no, he continues to select consumers un
Using AIU's large database of survey responses (see attached files), complete all of the following: Work through a t-test to compare the means of two groups of data. One possible example is to compare the tenure of females to the tenure of males. Select one of the quantitative variables from the DataSet (include all 288 cases
Data represents the gender 1 Male 13 2 Females 17 Total scores (cases ) 30 genderData of 291 case 2 1 1 2 1 2 1 1 1 2 1 2 2 2 1 2 1 2 2 2 2 2 1 1 2 2 1 2 2 2 1 2 1 2 2 2 2 1 1 2 2 1 1 1
Make up statistics to show how the following tests are performed and plotted in a chart: T-test, Independent Sample T, Dependent Sample T, One-way ANOVA with LSD, Two-way ANOVA
Assume the males and females who prefer the movie "Crash" are samples taken from the population of males and females in the U.S. Their heights are used to calculate sample statistics. Females-17 Males-9 Females heights-66,62,64,71,61,68,68,62,69,68,70,64,63,68,62,64,67 Male heights-71,76,71,66,74,76,73,72,70 1. Use stude
Question 1 For each of the following exercises, identify which of the following tests is the correct choice and state whether the test in one- or two-tailed. Explain your reasoning. a) one-sample z test of proportions b) two-sample z test of proportions c) one-sample t test of means. d) two-sample (independent) t te
Jill constructs a test to measure a personality state. The test consists of multiple items which sum up to indicate the degree of the trait that is present. It is important to note that Jill is measuring a state that is quite variable. Which measure of reliability would be LEAST appropriate for assessing the adequacy of her test
Use the calculator provided to solve the following problems. - Consider a t distribution with 29 degrees of freedom. Compute P(t<=1.19)nd your answer to at least three decimal places. - Consider a t distribution with 22 degrees of freedom. Find the value of c such that P (-c < t < c)=0.95. Round your answer to at least
In testing whether each of the independent variables (Xs) in a multiple regression equation is statistically significant in explaining the dependent variable (Y), one uses the: a F-test b Durbin-Watson test c t-test d z-test e none of the above
1. Fill in the steps of the hypothesis test for the following problem. Let Population 1 be the population of convictions in Albany County. An actuary for the Life Trust Insurance Company is responsible for adjusting automobile insurance rates based on DWI convictions. The New York State Department of Motor Vehicles provided
I am working on a research paper for forensics where I am studying striated toolmark patterns created by a tool on various types of materials. I have summarized my data to show the total number of matching striations (lines), the % matching lines and the occurrences of consecutively matching striae (CMS). CMS has been show throu
The manufacturer of the Ososki motorcycle advertises that the cycle will average 87 miles per gallon of gasoline. A sample of eight bikes revealed the following mileage: 88, 82, 81, 87, 80, 78, 79, 89 At the .05 level, is the mean mileage less than the advertised 87 miles per gallon?