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

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

Question 6 The data shown in Table 3 are and R values for 24 samples of size n = 5 taken from a process producing bearings. The measurements are made on the inside diameter of the bearing, with only the last three decimals recorded (i.e., 34.5 should be 0.50345). Perform a process capability analysis using and R charts for the data from Table 3. Table 3: Data for Question 6 Sample Number R | Sample Number I Ꭱ 1 34.5 3 13 35.4 8 2 34.2 4 14 34.0 6 ∞∞ 31.6 15 37.1 5 4 31.5 4 16 34.9 7 56789 35.0 5 17 33.5 4 34.1 6 18 31.7 3 32.6 4 19 34.0 8 33.8 3 20 35.1 4 34.8 7 10 33.6 8 11 31.9 3 12 38.6 9 2232 21 33.7 2 32.8 1 33.5 24 34.2 2 32 3

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?

Please answer these two short questions

3. solve for s2  = t  = t    > t    <

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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Question3: If the researcher in Question 1 increases the sample size to 64, calculate the 90% CI for the average GPA of college students with the new sample size. What is the standard error? What is the critical z or t score? What is the CI? Interpret the 90% CI.

14) part B

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

Steps 4,7 and 2B please.

Question 2 Parts manufactured by an injection molding process are subjected to a compressive strength test. Twenty samples of five parts each are collected, and the compressive strengths (in psi) are shown in Table 2. Table 2: Strength Data for Question 2 Sample Number x1 x2 23 x4 x5 R 1 83.0 2 88.6 78.3 78.8 3 85.7 75.8 84.3 81.2 78.7 75.7 77.0 71.0 84.2 81.0 79.1 7.3 80.2 17.6 75.2 80.4 10.4 4 80.8 74.4 82.5 74.1 75.7 77.5 8.4 5 83.4 78.4 82.6 78.2 78.9 80.3 5.2 File Preview 6 75.3 79.9 87.3 89.7 81.8 82.8 14.5 7 74.5 78.0 80.8 73.4 79.7 77.3 7.4 8 79.2 84.4 81.5 86.0 74.5 81.1 11.4 9 80.5 86.2 76.2 64.1 80.2 81.4 9.9 10 75.7 75.2 71.1 82.1 74.3 75.7 10.9 11 80.0 81.5 78.4 73.8 78.1 78.4 7.7 12 80.6 81.8 79.3 73.8 81.7 79.4 8.0 13 82.7 81.3 79.1 82.0 79.5 80.9 3.6 14 79.2 74.9 78.6 77.7 75.3 77.1 4.3 15 85.5 82.1 82.8 73.4 71.7 79.1 13.8 16 78.8 79.6 80.2 79.1 80.8 79.7 2.0 17 82.1 78.2 18 84.5 76.9 75.5 83.5 81.2 19 79.0 77.8 20 84.5 73.1 78.2 82.1 79.2 81.1 7.6 81.2 84.4 81.6 80.8…

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.

Attached is the image of my homework. I was wondering how I know if it's directional or non directional hypothesis based on the problem. Additionally, I was wondering how to calculate df since this is t test for two independent samples. thank you!

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.

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

Match each step on the left with the procedure at that step on the right. Step 1 3 Procedure a. calculate test statistics b. compare p-value with alpha c. write null and alternative hypotheses d. identify test type e. write conclusion f. reject or fail to reject null hypothesis g. calculate p-value

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

Question 44 Given the following hypothesis test: Ho: HxS20 Ha: Hx>20 and this information: n= 36 , X = 24.6, Sx = 12 , 0x is unknown %3D What would be the value of the test statistic for this test? O 2.3 O 0.38 O-2.3 O -0.38 O none of these « Preinus

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7% D Window Help Chrome File Edit View History Bookmarks Реople Thu 9:45 PM BExtra Credit Sx b My Questions C This Assignmer X Unit 7.3 Condu G Nancy, an eco New Tab + X bconline.broward.edu/d2l/le/content/407158/viewContent/10432138/View ot 9 PM Make a Conclusion and Interpret the Results of a One-Mean Hypothesis Test (Population Standard Deviation Known) Using the P-Value Approach Question ot Nancy, an economist, would like to make the claim that the average weekly grocery budget for households in a small U.S. city is less than $253. Nancy samples 18 households in the same city and obtains a sample mean of $229.60 spent on 18 PM groceries per week. At the 2.5% significance level, should Nancy reject or fail to reject the null hypothesis given the sample data below? 9 PM Ho : u = $253 per week; Ha :u < $253 per week 0.025 (significance level) a ot 4 PM test statistic = -0.75 Use the graph below to select the type of test (left-, right-, or two-tailed) O PM Then set the a and the test…

urgently please answer question 2 and 3 QUESTION 2   An experiment was conducted into car tyre wear by the department of Materials Science at Lowlands University, which it has been asked to carry out by a tyre company.   The tyre company hascreated a new compound which it hopes will make tyres last much longer. Various levels of the compound were mixed in with rubber to make tyres. Apart from that, all the tyres were identical, with 16mm of tread when new. One hundred motorists chosen at random were given new tyres, and split into ten groups. After each motorist had completed 10,000 miles on the new tyres, the level of tread remaining was measured. The data recording the experiment is set out in the table below.   You have been asked to use correlation analysis to see if there is a relationship between the percentage of the new compound and the wear on the tyres.   Identify appropriate x and y variables, stating clearly which variable is the “x” variable and which is the “y” variable…

9:27 PM Thu Apr 6 < no BEE a Child 1 2 3 4 6 5 17. Psychostimulant drugs (such as Ritalin) help children with ADHD focus better on classroom material. But a researcher wonders whether Ritalin might also influence children's ability to engage in productive social interactions. She selects 6 children who are newly diagnosed with ADHD. During one week, participants receive Ritalin, and during another week, the same participants receive a placebo. Their classroom teacher rates their social skill at the end of each week (data are shown below; higher scores indicate better social interactions). Consider the appropriate test for this question and answer Parts a-d. Note: you do NOT need to calculate means, standard deviations or the test statistic!! Homework 6 Mean SD Social score for Ritalin week (points) 23 12 15 20 21 19 18.33 points. 4.08 pts Untitled (Draft) Social score for Placebo week (points) 18 18 5 16 22 11 15.00 points 6.07 pts A) (b) What is the null hypothesis in symbols? T n…