homework assignment

Referring to Table 1, which of the following is an appropriate alternative hypothesis?   Question 25 options:   1)  H1 : μI - μII  = 0   2)  H1 : μI - μII < 0   3)  H1 : μI - μII > 0   4)  H1 : μI - μII ≠ 0

question 3 part 3  the equation for the problem is picture number 2

If H1: μ1 – μ0  > 0 and α = 0.05, what effect size seems to interest me if I wish to achieve power =0.05 with a sample size of 44? The answer is: 0.5 Please provide a solution to this problem and explain the answer

If H1: μ1 – μ0  > 0 and α = 0.05, what effect size seems to interest me if I wish to achieve power =0.8 with a sample size of 13? a. 0.5 b. 0.1 c. 0.6 d. 0.8

PRINTER VERSION Chapter 09, Section 9.2, Problem 014c ( BACK NEXT Consider Ho: µ = 38 versus H1: µ> 38. A random sample of 35 observations taken from this population produced a sample mean of 40.29. The population is normally distributed with o = 7.2. Calculate the p-value. Round your answer to four decimal places. p = the tolerance is +/-2% Question Attempts: 0 of 2 used SAVE FOR LATER SUBMIT ANSWER powered by MapleNet on y Study Version 4.24.20.1 nt I Privacy Policy I 2000-2020 John Wiley & Sons, Inc. All Rights Reserved. A Division of John Wiley & Sons, Inc. MacBook Air 888 F12 F11 80 F10 F8 F9 F6 F7 F4 F5 F1 F2 23 2$ del %3D 7 8 9 2 4

the solution is not clearly written here

Scenario 2 To measure whether test performance can be predicted based on one's anxiety, a researcher asked his students to come to the lab 15 minutes before they were to take an exam in his class. The researcher measured the students' heart rates and then matched these scores with their exam performance after they had taken the exam. Use the data below and SPSS to test whether heart rate can predict test performance in the population. 田 Student Heart Rate Exam Score A 76 78 B 81 68 60 88 D 65 80 E 80 90 F 66 68 82 60 H 71 95 I 66 84 J 75 75 K 80 62 L 76 51 M 77 63 N 79 71 7. In this specific scenario, are the two variables of interest? Which is the IV and which is the DV? What is the scale of measurement for each variable? Page 3 of 7

Speed w/ ordinary shoes Speed w/ special shoes Runner INSTRUCTIONS: 1. State the null and alternative hypotheses. A 12.1 mi/h 12.5 mi/h 2. State the level of 14.4 mi/h 15.0 mi/h significance and critical value. C 11.6 mi/h 11.4 mi/h 3. Calculate the 11.2 mi/h 11.6 mi/h ttest. E 12.4 mi/h 11.8 mi/h 4. Interpret the result. F 11.6 mi/h 12.0 mi/h 5. State conclusion. G 15.0 mi/h 14.9 mi/h

ht than ollow Problem 2 Tellowing A study is conducted on the effects of two drugs (simply called Drug A and Drug B) upon hyperactivity in laboratory rats. Two random sample of rats are used for the study - one sample receiving Drug A, the other receiving Drug B. After two weeks, the rats are measured on hyperactivity with the following results: Drug A: X, = 75.6 S1 = 3.5, n, = 18 Drug B: X2 = 72.8 S2 = 3.2 n2 = 24 1) State the null hypothesis and the alternative hypothesis. 2) Find the critical value. Use a = 0.05 3) Find the standardized t test. 4) Find the p-value 5) Decide whether to reject or fail to reject the null hypothesis. 6) Interpret the result.

Scenario: 200 people were asked, “Who is your favorite superhero?” Below are the data.  Test the null hypothesis that the population frequencies for each category are equal.  α= .05. Iron Man Black Panther Wonder Woman Spiderman fo = 40 fo = 60 fo =55 fo = 45 fe = fe = fe = fe =   degrees of freedom, df = ______, and the Chi Square critical boundary = ______

Step 1 of 3 :   State the null and alternative hypotheses for the test. Fill in the blank below. H0: μd=0 Ha: μd⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯0 Step 2: What is the test statistic? Step 3: Do we reject the null hypothesis? Is there sufficient or insufficient data?

No need for explanation

Ho : H= 1.87 H1 : u tcrit = 1.645, then reject Ho; otherwise fail to reject Ho. Oa = 0.05; one-tailed; if tobt > tcrit= 1.761, then reject Ho; otherwise fail to reject Ho. Oa= 0.05; one-tailed; if zobt < Zcrit = -1.645, then reject Ho; otherwise fail to reject Ho. %3D α. QUESTION 20 For 6 months we worked with a groun of 15 severelv mentally handicapped individuals in an attempt to teach them self-care through imitation. For a second 6- Save All Ar Click Save and Submit to save and submit. Click Save All Answers to save all answers.

Please answer these two short questions

Please help with this statics question, not sure if my answers are correct. Would you please help solve? Thanks

E 3 of 12 Questions Completed 7 out of 12 Resources Submit All Press esc to exit full screen 1 Question Question 3 of 12 > An analyst at a state's environmental quality commission has just finished processing salt concentration tests on 60 wells in 2 Question Washington County to represent the more than 1,000 wells across the state. Water with salinity concentration less than 0.05% is considered fresh. 3 Question 0.03 on this sample of wells to determine if the overall salt concentration of the state's water supply exceeds 0.05%. The shape of the sample data is approximately symmetric The analyst decides to run a one-sample t test at a significance level of a = 4 Question with no outliers, and its statistics are 5 Question x = 0.048% Sx = :0.0366% 6 Question P-value :0.0166 7 Question where x is the sample mean, sz is the sample standard deviation, and the P-value is the probability that results from the t test. The analyst decides that there is enough evidence to conclude that the…

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ASSESSMENT OF PERFORIMANLE / PRODUCT Direction: Apply the steps that you learned in hypothesis testing to the given Problem below. Write your answer on a separate sheet of paper. Problem : Consider a study wherein the effectiveness of banana leaves as an organic cooked rice Wrapper was compared to that of alumimum foil The number of bacterial colonies in the two kinds of food wrappers was measured after 12 hours at room temperature. The ev is 28, £= 0.01. The result of computad value is 0.8. Hvnothesis: Ho: 2. Ha: 3. Level of Sienificance: 4. Statistical Tool: 5. Computation Results: 6. Decision Rule: 7. Internretation:

Question 44 For a population with u = 50 and o = 10, a score of X 55 corresponds to z = +0.50. True False Question 45

Question 2 You are developing a new analytical method for the determination of blood glucose content. You want to ascertain whether your method differs significantly from a standard method for determining a range of sample concentrations expected to be found in the routine laboratory. It has been ascertained that the two methods have comparable precision. Following Table 2.0 are two sets of results for a number of individual samples: Sample b с d e f Table 2.0 Your method (mg/L) 10.2 12.7 8.6 17.5 11.2 11.5 Standard method (mg/L) 10.5 11.9 8.7 16.9 10.9 11.1 (a) State the null and alternative hypotheses. (b) Determine whether there are differences in the two methods at the 95% and 99% confidence levels.

Steps 4,7 and 2B please.

QUESTION 13 Suppose dfErr = 16, SST = 1917, and Se = 3.9 for the simple regression ý = bo + b1(x). What is r2? a. 0.8731 b. None of the answers is correct c. 0.8874 d. 0.8811 e. 0.8651 QUESTION 14 New Last Year Comple Cinall Click Save and Submit to save and submit. Click Save All Answers to save all answers. MacE 20 D00 FA F1 F3 F5

QUESTION 4 A drug company is testing to see if their new drug does lower total cholesterol. The used a population who had a total cholesterol reading of 32 5 mg/dL prior to using the drug. Ho: H = 325 Ha: H<325 Suppose the results of their testing lead to rejection of the null hypothesis. Classify that conclusion as: correct, Type I error or Type II error, if in fact the total cholesterol levels have decreased.

(No. 1) Given: μ = 48, s = 17, n=25 and x = 65 STATISTICAL TOOL: T-TEST: ONE SAMPLE MEAN Formula: Solution: (No. 2) Given: x₁ = 7; x₂= 5; 5₁² = 2; 5₂² = 4; n₁ = 10; n₂ = 10 STATISTICAL TOOL: T-TEST: TWO SAMPLE MEANS Formula: Solution:

Solve the problem. From the TI-84 graphing calculator screenshots below, choose the screenshot whose shaded area correctly depicts the following hypothesis test results: Ho: p = 0.25, Ha: p > 0.25, a = 0.05, z = 2.01, p-value = 0.022 O O Ar&q=.420349 10w=.201 lup=10 01 AP44=.022216 low=2.01 up=10 Y S

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E. D. Species Sum of Sample Values A Σi Yai = 42.3 B C Σi-1 YBi = 44.1 ΣΥΒ Yci = 48.6 Calculate the sum of squares for treatment in a one-way ANOVA with species as the factor. Jade asked her colleague to perform a two-way ANOVA on the same sample data with food type and species as the two factors. Her colleague performed the two-way ANOVA (assuming any required assumptions were satisfied) but unfortunately misplaced the results. All that he could remember was that there was an interaction between food type and species at the 5% significance level but not at the 2.5% significance level. Calculate the two values between which the sum of squares for interaction in this two-way ANOVA must lie.

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Question 5/9 56 % If us0.34 is the stated null hypothesis, what is the alternative hypothesis? Ο μ0.34 Ο μ20.34 Type your answer here:

Exhibit 9-31 n = 64 x= 32.8 o=15 Ho: μ = 30 H₂:30 Refer to Exhibit 9-31. If the test is done at a 5% level of significance, the null hypothesis should not be rejected None of the answers is correct. Not enough information is given to answer this question. be rejected

QUESTION 10 Find the critical value or values of y2 based on the given information. H1: o > 26.1 n = 9 a = 0.01 1.646 21.666 O 20.090 O 2.088