Dear OTA, Can you please help me with this homework assignment? Thanks 1. Burney Watt, chief electrician for the Prescott Electrical Coop has been watching the electric bills for 10 properties in Prescottvilla, the up and coming snobby subdivision south of town. The residents there have been complaining that their "b
1. The General Social Survey is an annual survey given to about 1,500 U.S. adults selected at random. Each year, the survey contains several questions meant to probe respondents' views of employment. A recent survey contained the question "How important to your life is having a fulfilling job?" Of the 261 college graduates surve
Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. Research question: At α = .01, is the degree of certainty independent of credits earned? ... [See the attached question file.]
Please see the attached file. **All work shown (step by step), in simple terms please!!! No excel, just formulas**. 20) A marketing research firm wished to study the relationship between wine consumption and whether a person likes to watch professional tennis on television. One hundred randomly selected people are as
A large department store hired a researcher to compare the average purchase amounts for the downtown store with that of its mall store. The information shown was obtained. At the 0.01 significance level can it be concluded that the mean amount spent at the mall store is larger?Estimate the p-value? Average purchase amountÂ
The production line that packages boxes of raisins at a snack food manufacturer will be considered operating properly if the average weight of the boxes of raisin is 3.5 ounces with a standard deviation of 0.3 ounces. A random sample of 20 boxes showed an average weight of 3.30 ounces. a. State the value of the correct reje
Test 1. Do a hypothesis test to see if the small sample (data attached) of 10 bags of M&M's indicates that there is a difference between the small sample and the historical population or M&M's. The historical average was 56.5 and the historical standard deviation was 1.2 Please follow the step by step procedure for a hypot
Scrap rates per thousand (parts whose defects cannot be reworked) are compared for 5 randomly selected days at three plants. Does the data prove a significant difference in mean scrap rates? ScrapRate Plant A Plant B Plant C 11.4 11.1 10.2 12.5 14.1 9.5 10.1 16.8 9.0 13.8 13.2 13.3 13.7 14.6 5.9.
Do a two-sample test for equality of means assuming equal variances. Calculate the p-value. a. Comparison of GPA for randomly chosen college juniors and seniors: ¯x1 = 3.05, s1 = .20, n1 = 15, ¯x2 = 3.25, s2 = .30, n2 = 15, α = .025, left-tailed test. b. Comparison of average commute miles for randomly chosen stude
A machine used for packaging seedless golden raisins is set so that their standard deviation in the weight of raisins packaged per box is 0.25 ounce. The operations manager wishes to test the machine setting and selects a sample of 30 consecutive raisin packages filled during the production process. Their weights are as record
Following sample data shows the quarterly earnings in millions for two US companies. Your research interest is (at .05 level of significance) determining if the average earnings for these companies are different. Justify your answer by doing a five step testing of hypothesis. Also, compute the p-value of the test. Company -
In a recent survey, 10 percent of the participants rated Pepsi as being "concerned with my health." PepsiCo's response included a new "Smart Spot" symbol on its products that meet certain nutrition criteria, to help consumers who seek more healthful eating options. At α = .05, would a follow-up survey showing that 18 of 10
The alternate hypothesis does not have an equal and is the opposite direction of the null. 1) If Ho: p >= .25, then the H1: is what? 2) If H1: m >= 3.14, hten the Ho: is what?
What are the z-values for CI at 90%, 95%, 99%?
See attachment for problem High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter. Noise level is defined as "Low" (under 88 decibels), "Medium" (88 to 91 decibels), or "High"
See attachment for problem A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location. Research question: A
1. Using the data file TRX.XLS (attached), construct a 95% confidence interval for the average number of prescriptions written for Prilosec. Assume the distribution in normally distributed. There are 24 months to be averaged. Use Descriptive Statistics in Excel and be sure to check the appropriate options. If you can't see the o
The results of a recent study regarding smoking and three types of illness are shown below. The illnesses are Emphysema, Heart Problem, and Cancer. Under nonsmokers there were 20 with emphysema, 70 with heart problems and 30 with cancer for a total of 120. Under smoker there were 60 with emphysema, 80 with hear problems and 40 w
The standard deviation of the ages of a sample of 21 executives from the northern states was 8.4 years; while the standard deviation of the ages of a sample of 30 executives from southern states was 12.8 years. At an alpha level = 0.01, test to see if there is any difference in the standard deviation of the ages of all the north
A lumber company has claimed that the standard deviation for the lengths of their 6 foot boards is 0.5 inches or less. To test their claim , a random sample of 17 six-foot boards is selected; and it is determined that the standard deviation of the sample is 0.42. Do the results of the sample support the company's claim? Use alph
1. Consider the following hypothesis test: Ho: u</= 12 Ha: u>12 A sample of 25 provided a sample mean x=14 and a sample standard deviation s = 4.32 a. Compute the test statistic. b. Use the t distribution table to compute a range for the p value c. At alpha= 0.05, what is the conclusion. d. What is the rejection rule us
22. Car manufacturers have to publish an estimated MPG for each model production. Prior to manufacturing "Car A" the manufacturer stated that the MPG. ... 25. A group of University of Florida psychologist investigated the effects of age and gender on the short-term memory of adults ... 26. The Time/CNN survey, 24% if 205 s
22 The mean arrival rate of flights at O'Hare Airport in marginal weather is 195 flights per hour with a historical standard deviation of 13 flights. To increase arrivals, a new air traffic control procedure is implemented. In the next 30 days of marginal weather the mean arrival rate is 200 flights per hour. (a) Set up a rig
Please use Excel to solve the statistics problem. The MBA department is concerned that dual degree students may be receiving lower grades than the regular MBA students. Two independent random samples have been selected. 100 observations from population 1 (dual degree students) and 100 from population 2 (MBA students). The sam
Please see attached. Data Set "B" is on last page. Choose the dependent variable (the response variable to be "explained") and the independent variable (the predictor or explanatory variable) as you judge appropriate. Use a spreadsheet or a statistical package (e.g., MegaStat or MINITAB) to obtain the bivariate regression and r
Given n = 28; σ = 0.7; = 5.7; and α = 0.01; Test Ho: µ = 6 against Ha: μ and ≠6.
To test the hypothesis that students who finish an exam first get better grades, Professor Hardtack kept track of the order in which papers were handed in. The first 25 papers showed a mean score of 77.1 with a standard deviation of 19.6, while the last 24 papers handed in showed a mean score of 69.3 with a standard deviation of
Assuming that the population variances are equal for male and female Grade Point Averages (GPAs), use the following sample data to test whether the averages are different at the 0.05 level of significance. Male GPA's Female GPA's Sample Size 17 15 Sample Mean 3.8 3.9
A certain brand of fluorescent light tube was advertised as having an average illumination life-span of 2,000 hours. A random sample of 64 bulbs burned out with a mean life-span of 1,970 hours and a sample standard deviation of 80 hours. With a 0.05 level of significance, is the sample mean less than the advertised mean?
1. R.C. Geary wrote some 70 years ago that "Normality is a myth. There never was, is, nor will there ever be a Normal distribution". What do you think he meant and what relevance does it have to your work?(Read the Week 2 Lecture 1 before answering) 2.How do you feel that the inferential statistical technique of Hypothesis T