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 Warren Road MacBurger that the mean waiting time was 2.75 minutes. At the .05 signi
A statistically significant result occurs when the value of the test statistic falls in the rejection region. A result has practical significance when it is statistically significant and the result also is different enough from results expected under the null hypothesis to be important to the consumer of the results. By taking
Please use the attached PDF article to help me solve the following problem: Prepare an analysis of your selected article. Start by identifying the hypothesis described in the article, and explain how the hypothesis statement was used in the study. Be sure to properly cite your article, and be prepared to discuss your analysis
1. If you were to conduct right-tailed hypothesis test at 5% significance level, you choose the critical value this way. Assuming that the null hypothesis is true, you will find the value of the test statistic for which the probability of obtaining a value less than the specified value is 0.05. Is this true? Explain answer.
1. 20 problems 2. If confidence level is not given, assume 95% 3. Please show calculation using formula and using appropriate z table, student's t table, or Poisson table, etc. See attached file for full problem description.
Please help me with the following: 1. The average life span of a dog is proportational to the amount of calcium consumed. P- Parametric data or NP - nonparametric data? 2. A study of vehicle accidents on a military installation compared to driver's rank. P- Parametric data or NP - nonparametric data?
1. The graph portrays the decision criterion for a hypothesis. Determine the significance level. 2. Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis if: = 0.05 and the test is right-tailed. 3. Use
Fairfield Homes is developing two parcels near Pigeon Fork, Tennessee. In order to test different advertising approaches, they use different media to reach potential buyers. The mean annual family income for 75 people making inquiries at the first development is $150,000, with a standard deviation of $40,000. A corresponding sam
The null and alternate hypotheses are: 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 the .10 significance
Goodness of fit test : A student was given a die but he had no idea whether or not it was a fair die. He threw the die 480 times and each outcome was recorded. The results are given in the following table. xi 1 2 3 4 5 6 Oi 80 105 95 64 79 57 Test, at the 5% level of significance, whether or not this die is fair. You must s
Figures for the yearly crime rate (the number of crimes per 1,000 population) in Mississippi, USA from 1993 to 2002 are as follows: 1.35 1.63 2.33 2.41 2.63 2.93 3.41 3.26 3.64 4.51 (i) Display a normal probability plot using Minitab and test whether the data follow a normal distribution. Write down the null and alterna
A recent article in the Wall Street Journal reported that the 30 year mortgage rate is now less than 6%. A sample of 8 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 rate for small
The management of White industries is considering a new method of assembling its golf cart. The present method requires 42.9 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. Use th
The manufacture of theX-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 50,500 miles. Is C
A researcher knows that the population mean among college students taking the Social Conformity Test is a "neutral" 100. (scores higher than 100 are assumed to represent more conformity than average, and those lower than 100 indicate less conformity). A random sample of 30 students was selected, and the following values were rec
Problem #6 Investor's Business Daily The mean length of a work week for the population of workers was reported to be 39.2 hours (Investor's Business Daily, September 11, 2000). Suppose that we would like to take a current sample of workers to see whether the mean length of a work week has changed from the previously reported 39
The accounting department at Weston Materials, Inc., a national manufacturer of unattached garages, reports that it takes two construction workers a mean of 32 hours and a standard deviation of 2 hours to erect the Red Barn model. Assume the assembly times follow the normal distribution. 1. Determine the z values for 29
You want to check the claim that the Laurelhurst area has higher day care charges then the non Laurelhurst areas. Test the hypothesis that the Laurelhurst area has a higher daycare charge per month from the date below. LAURELHURST NON-LAURELHURST 500
Your company manufactures low calorie frozen dinners. The advertised calorie content is 200 calories. A consumer activist group, FACT: fat and calories tribunal, is claiming that your product is not consistent. In fact, they contain more than 200 calories. Run a hypothesis test proving that your dinners are less then 200 calorie
You own a small tea company, Sweet Leaf, NASDQ ticker symbol LEAF. You are looking at marketing costs versus benefits. Your production manager says it doesn't matter which tea you produce, all tea is the same. You say otherwise. You hire a consumer research firm headed my Matt Stat. He randomly interviews 100 consumers of your t
In the past, 38% of all students pass the state high school exam on their first try. A school posts a first time passing rate of 56%. If the school had a sample size of 324, is the school's 56% really any different that the state's 38%?
The scores of 133 males and 162 females on a test that measures a person's feelings are shown in the table below. Your conjecture is the "the feelings" of males and females in the population are different. Run a hypothesis test to check this proposition. Group Sample size x-bar Standard Deviation of the samp
Two high school principals are arguing about who has the better school. This principal for Hard Rock High, Desi Mall, draws a random sample of 100 of her seniors and finds that 75% scored above 650 on the math portion of the SAT. Sharon N. Formation, the principal of Preppy Magnet School, drew a sample of 25 students and found t
PiggyBank has narrowed its options down to two incentive plans: A. cash back when the consumer makes an online purchase; and B cash back when consumer makes a purchase at a clothing store. The bank doesn't know whether consumers would shop online more than at clothing stores. Information Experts has placed you in a gro
North Carolina State University looked at the factors that affect the success of students in a required chemical engineering course. Students must get a C or better in the course in order to continue as chemical engineering majors. There were 65 students from urban or suburban backgrounds, and 52 of these students succeeded. Ano
#4 In a study of hypnosis, breathing patterns were observed in an experimental group of subjects in a control group. The measurements of total ventilation (liters of air per minute per square meter of body area) are shown below. We want to know whether the groups follow the same distribution. Unfortunately, we cannot assume
#3 Heart disease patients often experience spasms of the coronary arteries. Because biological amines such as serotonin may play a role in these spasms, a research team measured serotonin levels post-mortem from patients who died of heart disease and from a control group that died of other causes. The data are summarized in t
See the attached file. Webber studied the relationship between pupal weight (in milligrams) and the number of ovarioles in females of the blowfly. We want to predict the number of ovarioles from the pupal size. (See table "Pupae" in Excel). 9.1 What test or procedure should be performed? 9.2 Perform the test and assess it
Plant physiologists were interested in the effects of different combinations of sugars on the growth of pea cultures grown in auxin. (see table 'Peas' in Excel) 8.1 What test should be performed? 8.2 Perform the test and report the significance. 8.3 If the test is significant, which test should you use to find which pa
PiggyBank has narrowed its options down to two incentive plans: A. cash back when the consumer makes an online purchase; and B. cash back when the consumer makes a purchase at a clothing store. The bank doesn't know whether consumers would shop online more than at clothing stores. Information Experts has placed you in a grou