Share
Explore BrainMass

Hypothesis Testing

A survey of n = 703 randomly selected workers showed that 61% of those respondents found their jobs through networking. (1) Please state the corresponding null and alternative hypotheses to determine if most (more than 50%) workers get their jobs though networking; (2) Please find the value of the test statistic for the claim that most (more than 50%) workers get their jobs though networking.

A survey of n = 703 randomly selected workers showed that 61% of those respondents found their jobs through networking. (1) Please state the corresponding null and alternative hypotheses to determine if most (more than 50%) workers get their jobs though networking; (2) Please find the value of the test statistic for the c

Hypothesis Testing of Enrollment Data

Please see attachment for question. Please show all work, thanks. Enrollment data over the past ten years indicates that 70% of the students taking elementary statistics at FHSU are female? Is the enrollment in this semester's virtual class significantly different from this claim, as measured statistically? Justify your ans

SPSS - Student Survey

2. Next we will again analyze the Student Survey data from PHC 6050 and STA 6126 stored in the SPSS data file bothclasses.sav. Using ?=0.05, test whether the 'population' mean weights of the two classes are the same. Next, test whether the 'population' mean heights of the two classes are the same (delete the observation correspo

Value approach and the traditional approach

Please help with these questions. I need to be able to understand how to do them. Please write out all steps from beginning to end , formulas etc. (need answers too so I can double check myself) please do not use excel, I need to see what I am trying to learn. Please see attached. Chapter 6 questions 1. A medical s

Hypothesis Testing: Feasibility of Outsourcing

I have to perform the five-step hypothesis test on the data attached pertaining to the feasibility of outsourcing a department such as customer service within the company, AT & T. I do not know how to perform a five-step hypothesis.

Writing a null hypothesis from a business problem proposal.

I need help writing a Business Problem Proposal using a null hypothesis. Here are sample business problems: * Talk about the effect of no smoking laws on the tobacco industry. Will the trend in no smoking laws affect cigarette sales? You can develop a null from that. * Dunkin' Donuts is trying to infiltrate Starbucks' mark

A newly installed automatic gate system was being tested to see if the number of failures in 1,000 entry attempts was the same as the number of failures in 1,000 exit attempts.

Please see the attached file; Do a complete hypothesis, include the hypothesis, decision rule, calculation of test statistic, decision, interpretation and t value. A newly installed automatic gate system was being tested to see if the number of failures in 1,000 entry attempts was the same as the number of failures in 1,000 e

Hypothesis testing for working hours

You are the Vice President for Human Resources at XYZ Investment Management, Inc. Your employees have recently complained about their long working hours. You collected a sample of 25 weekly time sheets and calculated an average of 41.5 hours with a standard deviation of 2.5 hours. Over lunch, you discuss this problem with you

Maumee Ford-Mercury: Relationship Between Care Age And Selling Price

The owner of Maumee Ford-Mercury wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year. Car Age (years) Selling Price ($000) Car Age (years) Selling Price ($000) 1 9 8.1 7 8 7.6 2 7 6.0 8 1

Hypothesis Testing: Agreement of Assessments

Do a complete hypothesis test on the attached problem, including hypothesis, decision rule, calculations of the statistic, decision, interpretation, and p- value. Assume Equal Variances at (alpha) = .025 (using excel) A certain company will purchase the house of any employee who is transferred out of state and will handl

10 Multiple choice questions on Hypothesis testing, distributions.

Please see the attached file for full problem description. 1. If standard deviation (sigma) is unknown when completing a hypothesis test about the population mean, then the best estimate for the unknown standard deviation is s. _____ T/F 2. The chi-square distribution is used for inferences about the population mea

Hypothesis testing for mean.

I am looking at this problem that suggests that people will follow a 24 hour cycle of sleeping and waking even if they are not exposed to the usual pattern of sunlight. Their cycles at the end of the study were 25, 27, 25, 23, 24, 25, 26, and 25. If we use the 5% level of significance what would we conclude about the theor

Test of Hypothesis

Ho:u1-u2 = 0 Ha:u1-u2 does not equal 0 The following results are for two independent samples taken from the two populations. Sample 1 N1 = 80 x1 = 104 o1 = 8.4 Sample 2 N2 = 70 x2 = 106 o2 = 7.6 1. What is the value of the test statistic? 2. What is the p-value 3. With a=.05, what is your co

Hypothesis Testing: P-Values, Point Estimates, and Error

1. Consider the following hypothesis test: Ho:u1-u2 = 0 Ha:u1-u2 does not equal 0 The following results are for two independent samples taken from the two populations. Sample 1 N1 = 80 x1 = 104 o1 = 8.4 Sample 2 N2 = 70 x2 = 106 o2 = 7.6 1. What is the value of the test statistic? 2. What is the p-valu

Hypothesis testing problems - MacBurger chain & White Industries

Dear OTA, Please help me with the attached problems with steps. Thanks 1) The MacBurger 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

Hypothesis Testing for the American Sugar Producers Association

1) The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds. 1. What is the value of the population mean? What is the best estimate of this value? 2. Explain why we need to use t

Test hypothesis

You are the Vice President for Human Resources at XYZ Investment Management, Inc. Your employees have recently complained about their long working hours. You collected a sample of 49 weekly timesheets and calculated an average of 41.5 hours with a standard deviation of 2.5 hours. Using a significance level of 0.01, can you

Methodology Involved in Hypothesis Testing

I need to complete the following - please help me so I can expand on your ideas: Complete and submit a 1000-word report describing the methodology involved in Hypothesis testing. It is required that you include an example of a business situation in which hypothesis testing can utilized.

Hypothesis Testing: Significance Difference in GPAs

You conduct a survey of a sample of 25 members of this year's graduating marketing students and find that the average GPA is 3.2. The standard deviation of the sample is 0.4. Over the last 10 years, the average GPA has been 3.0. Is the GPA of this year's students significantly different from the long-run average? At what alpha l

Testing of hypothesis problems for proportions

10.2 Find the sample proportions and test statistic for equal proportions. Is the decision close? Find the p-value. a. Dissatisfied workers in two companies: x1 = 40, n1 = 100, x2 = 30, n2 = 100, α = .05, two tailed test. b. Rooms rented at least a week in advance at two hotels: x1 = 24, n1 = 200, x2 = 12, n2 = 50, &#945

3questions reserved for you

Please do # 2, 3 and 5. 2. In a 2-week study of the productivity of workers, the following data were obtained on the total number of acceptable pieces: 65 36 49 84 79 56 28 43 67 36 43 78 37 40 68 72 55 62 22 82 88 50 60 56 57 46 39 57 73 65 59 48 76 74 70 51 40 75 56 45 35 62 52 63 32 80 64 53 74 34 76 60 48 55 51 54

Calculating the P-Value Using Sample Groups

Given the following data, how do I calculate the p-value using two sample groups in my hypothesis testing. Please show the steps involved. In a sample of 210 men, 35 prefer sugar free soft drinks. In a sample of 220 women, 42 prefer sugar free soft drinks. Using a significance level of 0.05, test whether women prefer sugar fr

Baseball, Record Store and College Admin Probabilities

Problem #4 Historically, the Giant's opening home game has been on a Sunday with an average crowd of 60,000. During the last 5 years, they have opened on Saturday with an average crowd of 58,000. Allowing a 2,5% error of type 1, formally test the hypothesis that opening on Saturday has dampened attendees. S =S/vn=1000 Su

Significance Levels: Age

A manager of a sporting goods store claims that the average age of customers who buy a certain product is 25. A random sample of 55 customers had an average age of 25.6. At a significance level of 1%, should this claim be rejected? Assume sigma = 1.25.