STAT 614 ANOVA HW9

Based on the ANOVA  table given, is there enough evidence at the 0.05 level of significance to conclude that the linear relationship between the independent variables and the dependent variable is statistically significant? Source df SS MS F Significance F Regression 3 1453.960807 484.653602 6.860011 0.006054 Residual 12 847.789193 70.649099     Total 15 2301.750000       A) Yes B) No

The dry shear strength of birch plywood bonded with different resin glues was studied with a completely randomized designed experiment. Here are the data: Glue A (102; 58; 45; 79; 68; 63; 117) Glue C (100; 102; 80; 119) Glue F (220; 243; 189; 176; 176). What is the F critical value at the 2.5% significance level

The table below shows the numbers of bushels of barley cultivated per acre for 12 one-acre plots of land for two different strains of barley, PHT-34 and CBX-21. PHT-34 CBX-21 43 55 49 46 47 43 38 44 47 45 45 49 50 47 46 59 46 52 46 49 45 48 43 51     Determine the minimum data value, the quartiles, and the maximum data value for the PHT-34 and CBX-21 data sets.     PHT-34 CBX-21 min     Q1     Q2     Q3     max

Find the critical value and rejection region for the type of​ t-test with level of significance α and sample size n.   ​Right-tailed test, α=0.01​, n=32 .   A. t0=2.449​; t>2.449   B. t0=−2.453​; t<−2.453   C. t0=2.453​; t>2.453   D. t0=1.309​; t>

Use the contingency table to the right to​ (a) calculate the marginal​ frequencies, and​ (b) find the expected frequency for each cell in the contingency table. Assume that the variables are independent.     Rating   Size of restaurant Excellent Fair Poor   Seats 100 or fewer 183 206 166   Seats over 100 180 316 151         Question content area bottom Part 1 ​(a) Calculate the marginal frequencies and sample size.     Rating   Size of restaurant Excellent Fair Poor Total Seats 100 or fewer 183 206 166   Seats over 100 180 316 151   Total         Part 2 ​(b) Find the expected frequency for each cell in the contingency table.     Rating Size of restaurant Excellent Fair Poor Seats 100 or fewer       Seats over 100

All Fresh Seafood is a wholesale fish company based on the east coast of the U.S.  Catalina Offshore Products is a wholesale fish company based on the west coast of the U.S.  Table #9.2.5 contains prices from both companies for specific fish types ("Seafood online," 2013) ("Buy sushi grade," 2013).  Do the data provide enough evidence to show that a west coast fish wholesaler is more expensive than an east coast wholesaler?  Test at the 5% level. (Show work) Table #9.2.5: Wholesale Prices of Fish in Dollars     Fish All Fresh Seafood Prices Catalina Offshore Products Prices Cod 19.99 17.99 Tilapi 6.00 13.99 Farmed Salmon 19.99 22.99 Organic Salmon 24.99 24.99 Grouper Fillet 29.99 19.99 Tuna 28.99 31.99 Swordfish 23.99 23.99 Sea Bass 32.99 23.99 Striped Bass 29.99 14.99

Find the critical value and rejection region for the type of​ t-test with level of significance α and sample size n.   ​Left-tailed test, α=0.05​, n=24   A. t0=−1.714​; t<−1.714   B. t0=−2.807​; t<−2.807   C. t0=−1.711​; t<−1.711   D. t0=1.714​; t>

Determine the kurtosis if the data given is a sample.

A researcher conducted a repeated measures study comparing three treatment conditions. Refer to attached images and tale to answer a to d.   Mean Std. Deviation N Treatment I 1.00 1.414 5 Treatment II 5.00 2.345 5 Treatment III 6.00 1.581 5     In APA format, report the F-ratio related to the treatment effect: Is this treatment effect significant? What is the partial η2  value for the treatment effect? Is this a weak, moderate, or strong effect?

In order to determine if the average bacteria content of southern flowing streams is less than the average bacteria content of northern flowing streams, independent random samples of 28 southern flowing streams and 35 northern flowing streams were taken. Given the testing statistics below, determine if the data provides sufficient evidence to conclude that the average bacteria content of southern flowing streams is less than the average bacteria content of northern flowing streams, at the 5% significance level. H0:μs≥μnHa:μs<μn t0=−0.108 t0.05=−1.999 Select the correct answer below:   No; the test statistic is less than the critical value.   Yes; the test statistic is greater than the critical value.   No; the test statistic is greater than the critical value.   Yes; the test statistic is less than the critical value.

A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table shows the results for the number of bacteria per cubic foot for both types of rooms.   Full data set      Carpeted   Uncarpeted 7.5 14.9 9.4 5.1 10.6 4.2 9.2 12.7 9.9 13.3 9.3 4.2 6.9 11.1   7.5 12.5   Determine whether carpeted rooms have more bacteria than uncarpeted rooms at the α=0.05 level of significance. Normal probability plots indicate that the data are approximately normal and boxplots indicate that there are no outliers. State the null and alternative hypotheses. Let population 1 be carpeted rooms and population 2 be uncarpeted rooms.     A. H0​: μ1=μ2 H1​: μ1>μ2 This is the correct answer.   B. H0​: μ1<μ2 H1​: μ1>μ2   C. H0​: μ1=μ2 H1​: μ1≠μ2   D. H0​: μ1=μ2 H1​: μ1<μ2 Your answer is not correct. Determine the​ P-value for this hypothesis test.   ​P-value=nothing…

Are yields for organic farming different from conventional farming yields? Independent random samples from method A (organic farming) and method B (conventional farming) gave the following information about yield of lima beans (in tons/acre). Method A 1.53 1.91 1.29 1.11 1.61 1.87 1.35 1.45 1.97 1.33 2.33   Method B 1.69 2.19 1.77 2.21 1.55 1.37 2.03 1.13 1.15 1.57 1.21 1.63 b) Compute the sample test statistic. (Use 2 decimal places.)     (c) Find the P-value of the sample test statistic. (Use 4 decimal places.)   give directions on how to do in excel please

The following data was calculated during a study on medical billing. Now find the critical value(s) and sketch the rejection region for this hypothesis test at a 5% significance level:  The medical billing specialist would like to test the claim that the proportion of patients with high-deductible health plans who have overdue medical bills is greater than 51%. Sample size =35 patients with high-deductible health plans Sample proportion =0.60  Test statistic z0=1.07   Fail to reject H0. There is NOT strong evidence to conclude that the proportion of patients with high-deductible health plans who have overdue medical bills is greater than 51%. Fail to reject H0. There is strong evidence to conclude that the proportion of patients with high-deductible health plans who have overdue medical bills is greater than 51%. Reject H0. There is NOT strong evidence to conclude that the proportion of patients with high-deductible health plans who have overdue medical bills is greater…

A manufacturer of automobile transmissions uses two different processes. Management ordered a study of the production costs to see if there is a difference between the two processes. A summary of the findings is shown next.    Process 1 Process 2 Total Process totals ($100s) 137 108 245 Sample size 10 10 20 Sum of squares 1,893 1,188 3,081 What is the critical value of F at the 5% level of significance?

Refer to the ANOVA table for this regression.  Source d.f. SS MS Regression 2 578,850 289,425 Error 21 378,420 18,020 Total 23 957,270     Using Appendix F on the pictures, calculate F.05, a=0.05, F statistics, R2, and R2 adj.

Are yields for organic farming different from conventional farming yields? Independent random samples from method A (organic farming) and method B (conventional farming) gave the following information about yield of sweet corn (in tons/acre). Method A 6.51 7.02 6.81 7.27 6.73 6.11 6.17 5.88 6.69 7.12 5.74 6.90 Method B 7.32 7.01 6.66 6.85 5.78 6.48 5.95 6.31 6.50 5.93 6.68   Use a 5% level of significance to test the claim that there is no difference between the yield distributions. (a) What is the level of significance?   (b) Compute the sample test statistic. (Round your answer to two decimal places.)   (c) Find the P-value of the sample test statistic. (Round your answer to four decimal places.)

A researcher is conducting an experiment to evaluate a treatment that is expected to increase the scores for individuals in a population. If the researcher uses a one-tailed test with a = .01, which of the following correctly identifies the critical region?   a. z > 2.33   b. z > 2.58   c. z < 2.58   d. z < 2.33

A researcher reports an F-ratio with dfbetween = 2 and dfwithin = 30 for an independent-measures ANOVA. a. How many treatment conditions were compared in the experiment? b. How many subjects participated ion the experiment?

Use the technology of your choice to perform a residual analysis on the data. Salary Offers. The College Placement Council conducts surveys on salary offers to candidates for degrees and publishes its findings in A Study of Beginning Offers. To study the effects of major and degree for physics and computer-science (CS) majors receiving a bachelor’s degree, a master’s degree, or a Ph.D., independent random samples of seven candidates each were obtained from the six groups under consideration. The salary data, in thousands of dollars, are given in the following table. We performed a two-way ANOVA on the data.

In a study examining the effect of alcohol on reaction time, Liguori and Robinson (2001) found that evenmoderate alcohol consumption significantly slowed response time to an emergency situation in a drivingsimulation. In a similar study, researchers measured reaction time 30 minutes after participants consumed one6-ounce glass of wine. Again, they used a standardized driving simulation task for which the regular populationaverages μ = 400 msec. The distribution of reaction times is approximately normal with σ = 40. Assume that theresearcher obtained a sample mean of M = 422 for the n = 25 participants in the study.a. Are the data sufficient to conclude that the alcohol has a significant effect on reaction time? Use a two-tailed testwith α = .01.

Lactation promotes a temporary loss of bone mass to provide adequate amounts of calcium for milk production. The paper “Bone Mass Is Recovered from Lactation to Postweaning in Adolescent Mothers with Low Calcium Intakes” (Amer. J. of Clinical Nutr., 2004: 1322–1326) gave the following data on total body bone mineral content (TBBMC) (g) for a sample both during lactation (L) and in the postweaning period (P). SubjectL 1928 2549 2825 1924 1628 2175 2114 2621 1843 2541P 2126 2885 2895 1942 1750 2184 2164 2626 2006 2627 Does the data suggest that true average total body bone mineral content during postweaning exceeds that during lactation by more than 25 g? State and test the appropriate hypotheses using a significance level of .05.

Use the contingency table to the right to​ (a) calculate the marginal​ frequencies, and​ (b) find the expected frequency for each cell in the contingency table. Assume that the variables are independent.       Rating       Size of restaurant   Excellent   Fair   Poor     Seats 100 or fewer   183   206   166     Seats over 100   180   316   151         Question content area bottom   Part 1   ​(a) Calculate the marginal frequencies and sample size.     Rating     Size of restaurant   Excellent   Fair   Poor   Total   Seats 100 or fewer   183   206   166   555   Seats over 100   180   316   151   647   Total   363   522   317   1202     Part 2   ​(b) Find the expected frequency for each cell in the contingency table.     Rating   Size of restaurant   Excellent   Fair   Poor   Seats 100 or fewer   enter your response here   enter your response here   enter your response…

Cadmium,aheavymetal,istoxictoanimals. Mushrooms,however,areabletoabsorband accumulate cadmium at high concentrations. The Czech and Slovak governments have set a safety limit for cadmium in dry vegetables at 0.5 parts per million (ppm). M. Melgar et al. measured the cadmium levels in a random sample of the edible mushroom Boletus pinicola and published the results in a paper. Here are the data: 0.24 0.59 0.62 0.16 0.77 1.33 0.92 0.19 0.33 0.25 0.59 0.32 At the 5% significance level, do the data provide sufficient evidence to conclude that the mean cadmium level in Boletus pinicola mushrooms is greater than the government’s recommended level of 0.5 ppm? Assume that the population standard deviation of cadmium levels in Boletus pinicola mushrooms is 0.37 ppm (Note: The sum of the data is 6.31 ppm.)