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Hypothesis Testing

Business Research

Please refer attached file for the tables. 1. A stock analyst wants to determine whether there is a difference in the mean rate of return for three types of stock: utility, retail, and banking stocks. The following sample information is collected. a. Using the 0.05 level of significance, is there a difference in the mean r

Probability and hypothesis testing problems

1. A manufacturing company measures the weight of boxes before shipping them to the customers. If the box weights have a population mean and standard deviation of 90 lbs. and 24 lbs. respectively, then based on a sample size of 36 boxes, the probability that the average weight of the boxes will: Be less than 84 lbs. is: a.

Deb's Pizza Decision to Add New Flavor

Deb's final decision is which new flavor of pizza to introduce to her customers. She offers 4 new varieties during the next week at the Corvallis location and tallies the number of slices sold below.

Hypothesis Testing: The Effectiveness of Ads

It's almost decision time, and the stakes are huge. With astronomical TV advertising costs per minute of airtime, it's been worthwhile to do some preliminary work so that nothing is wasted. In particular, you've been helping manage an effort to produce 22 ads for a personal hygiene product, even though only just a few will ever

5 step hypothesis testing problem

Data set on real estate attached and I have to do some hypothesis statements on detach and attach garages .Formulate both a numerical and verbal hypothesis statement regarding your research issue.in all i can say : 1.Perform the five-step hypothesis test on data pertaining to your selection. 2.Describe the results of your tes

Significance level of difference in gasoline

Martin Motors has in stock three cars of the same make and model. The president would like to compare the gas consumption of the three cars (labeled car A, car B, and car C) using four different types of gasoline. For each trial, a gallon of gasoline was added to an empty tank, and the car was driven until it ran out of gas.

Solving for the Significance Level

Scenario: During recent seasons, Major League Baseball has been criticized for the length of the games. A report indicated that the average game lasts 3 hours and 30 minutes. A sample of 17 games revealed the following times to completion. (Note that the minutes have been changed to fractions of hours, so that a game that lasted

Deb's Pizza Palace Analysis and Memo

Deb is the owner of Deb's Pizza Palace - an establishment that prides itself on preparing healthy but delicious pizzas sold by the slice. She is currently selling pizzas in a small shop on Monroe Ave. in Corvallis, but is considering an expansion of her current business to other campuses and needs help making this decision. Sh

Decision Process: Hypothesis Testing

Identify a decision process within your work or business interests that could be resolved based on data. a. Describe the null and research hypotheses. b. Compute (or use an educated guess for) an appropriate estimate and its standard error. c. Find a confidence interval. d. Test the hypothesis. e. Interpret and expla

Hypothesis Testing: increasing and Decreasing Values

Part 1 1) The value of the z- score that is obtained for a hypothesis test is influenced by several factors. Some factors influence the size of the numerator of the z- score and other factors influence the size of the standard error in the denominator. For each of the following, indicate whether the factor influences the numera

Left-Tailed, Two-Tailed and Right-Tailed Differences

Explain the difference between a left-tailed, two-tailed, and right-tailed test. When would we choose a two-tailed test? How can we tell the direction of the test by looking at a pair of hypothesis? How can we tell which direction (or o direction) to make the hypothesis by looking a the problem statement (research question)?

Population Standard Deviations and Means

Grand Strand Family Medical Center is specifically set up to treat minor medical emergencies for visitors to the Myrtle Beach area. There are two facilities, one in the Little River Area and the other in Murrells Inlet.The Quality Assurance Department wishes to compare the mean waiting time for patients at the two locations. Sam

Hypothesis testing Excel

1. The Randolph Corporation is planning to replace its Alpha Machine with a newer Beta Machine. Before the replacement of Alpha takes place, the company decides to run parallel productions to see if the Beta Machine actually reduces production times. The production time results for the two machines follow. Use Excel to dete

Significance level

In a particular market there are three commercial television stations, each with its own evening news program from 6:00 to 6:30 P.M. According to a report in this morning's local newspaper, a random sample of 150 viewers last night revealed 53 watched the news on WNAE (channel 5), 64 watched on WRRN (channel 11), and 33 on WS

P-value for Dole Pineapple, Inc

Dole Pineapple, Inc., is concerned that the 16-ounce can of sliced pineapple is being overfilled. Assume the standard deviation of the process is .03 ounces. The qualitycontrol department took a random sample of 50 cans and found that the arithmetic mean weight was 16.05 ounces. At the 5 percent level of significance, can we

Statistics for Management

See the attached file. The pet-drug market is growing very rapidly. Before new pet drugs can be introduced into the market place, they must be approved by the U.S. Food and Drug Administration. In 1999, the Novartis Company was trying to get Anafranil, a drug to reduce dog anxiety, approved. According to an article Novartis h

Statistical Article and Hypothesis

Record: 1 Title: Research studies find marketing budgets up. Authors: Maddox, Kate Source: B to B; 12/12/2005, Vol. 90 Issue 16, p28-28, 1/3p, 1 graph Document Type: Article Subject Terms: INTERNET marketing BUSINESS-to-business transactions BLACKFRIARS Communications Inc. BUSINESS enterprises -- United St

Statistics Question-Linear

A researcher wants to determine whether the number of minutes adults spend online per day is related to gender. A random sample of 315 adults was selected and the results are shown below. Test the claim that the number of minutes spent online per day is related to gender. Use α=0.05. Minutes Spent Online Per Day Gend

Z test for population mean from researcher

A researcher claims the average American drinks 52 gallons of cola per year with a population standard deviation of 2.0 gallons. We sample 25 random people and find the mean yearly consumption was 49 gallons. Using the significance level a= .10, and assuming a normal distribution what does the evidence conclude?

Hypothesis Testing (Z Testing)

A manufacturer believed he can get $1240 for his product. Wanting to prove his belief he collected a random sample of 64 potential buyers of his product and found on average they were willing to pay $1200 with a sample standard deviation of 100. If he tests at the  = .05 level what would he conclude?

Hypothesis Tests and Test Statistic

1. (1 point) The Dick Tracy Co. has developed micro-miniaturized circuitry that will enable them to produce a wristwatch-sized video-telecommunicator. Research and development costs are believed to be high, and the company is uncertain whether it should proceed. The company has a strategic alliance with Cells-R-Us, a national pr

Z test for population proportion

It was claimed recently that more than 65% of high school students in the United States use computers for educational purposes. We wish to examine this claim. We choose a random sample of 180 U.S. high school students and find that 123 of these students use computers for educational purposes. Based on this, can we conclude, at t

Statistics - Null and Alternative Hypothesis, Type 1 Error

Some college graduates employed full-time work more than 40 hours per week, and some work fewer than 40 hours per week. We suspect that the mean number of hours worked per week by college graduates mean (mu) of a population, is different from 40 hours and wish to do a statistical test. We select a random sample of college gradua

Null and Alternative Hypothesis for a Decade Old Study

A decade-old study found that the proportion of high school seniors who felt that "getting rich" was an important personal goal was 67%. Suppose that we have reason to believe that this proportion has changed, and we wish to carry out a hypothesis test to see if our belief can be supported. State the null hypothesis H0 and the a

Null and alternative hypothesis

A manager of an electronics store wants to know if the average sales during the Christmas period is greater than $ 30,000 a week. The null hypothesis to be formulated to test hypothesis is: The correct answer is a) HI = 30.000 or b) Ho = 30.000 or c) Ho <30.000 or d) Ho = 40.000 The correct answer for the altern

How does the Sun produce energy?

A bank tests the null hypothesis that the mean age of the bank's mortgage holders is less than or equal to 45, versus an alternative that the mean age is greater than 45. They take a sample and calculate a p-value of 0.1202. What can the bank conclude about the alternative hypothesis? Your answer must be given in the form of a

Starbucks Problem 16.17 Applied Statistics

Thirty four customers at Starbucks either ordered coffee (C) or did not order coffee (X) Research question At a=0.5, what is the sequence random? Here is the sample cxcxccccxxxxcxcxcxcccxcxccxcxxxccx

Statistics - Hypothesis Testing and Profit Distribution

1. A manufacturing firm recruits 45 new sales staff, and sends each on one of two training courses. 25 attend course A, and 20 attend course B. The sales figures are then collected for the following six months and the following summary statistics are produced from profits X (in pounds) generated from these sales: (see attach