if the hypothesis Ho: H=5 Versus Hai H#5 at significant level Alpha 10% then the critical values of this test are: Select one: a. +1.96 b. ±1,44 с. +1.28 d. ±1.645
Q: (d) Suppose it had previously been believed that when air void increased by 1 percent, the…
A:
Q: Question 2. An industrial engineer wishes to test the effect of four chemical agents on the strength…
A:
Q: - Using a significance level of a = 0.10, find the critical value(s). . Should we reject Ho or…
A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: What is the critical t value for a one sided test for alpha = .10? Imagine you are using a…
A: It is given that the test is One-sided, the sample size is 15 and the alpha value is 0.10. Degrees…
Q: In the result X² (3) = 8.4, p < 0.05, what is X²? O the significance level O the chi-square…
A: Given that χ2(3) = 8.4 , p < 0.05
Q: at 5% significance level Họ HZ HO; Ho iH < HO If the test statistic calculated to test the…
A: NOTE: As per the guidelines, we are supposed to solve one question only. Kindly repost other as…
Q: Please view the attached image and answer the following True/False Question
A: The degrees of freedom = (r-1) ×(c-1), where r is the number of rows and c is the number of columns.
Q: As we have noted in previous chapters, even a very small effect can be significant if the sample is…
A: Given, Correlation coefficient, r = 0.60 sample size n = 10 Degree of freedom, n-2 = 8 α = .05…
Q: For the following data, state the null and alternative hypotheses. What is the chi-square and the…
A: Formulation of HypothesisNull Hypothesis H0: - The distribution is uniformAlternative Hypothesis H1:…
Q: 2. Given a sample of ni =18 from a population with si = 13.5, and an independent sample of n2 =28…
A: It is been asked to test whether the population means are equal. Thus, the appropriate test to be…
Q: From the given problem below, a. State the null and the alternative hypotheses b. Compute the test…
A: From the provided information, Sample size (n) = 50 Sample mean (x̄) = 122.50 Population standard…
Q: When performing the Levene’s test of homogeneity what do we want when using an alpha level of .05?
A: Solution: Levene's test of homogenity that is equality of variance test: To test the hypothesis…
Q: (b) A television network will allow National Motors to advertise its claim if the appropriate null…
A: Z=x¯-μσn~N(0,1)
Q: The average wind speed in Casper Wyoming has been found to 12.7 miles per hour and in Phoenix…
A: The hypotheses are given below:
Q: t = 3.2. What conclusion is appropriate at each of the fol- lowing significance levels?
A: here given sample size = n = 15 test statistic = t = 3.2 and here it is right tail test
Q: The test statistic of z = - 1.73 is obtained when testing the claim that p = 1/2. a. Using a…
A:
Q: Arandom sample of 450 observations produced a sample proportion equal to 0.38. Find the critical and…
A:
Q: 10. What is S/N ratio for a system that has a pressure ofx psi and a sample standard deviat Vx for…
A: Given: To find S/N ratio has a pressure of x2 psi and a sample standard deviation of x for 1/x.
Q: The test statistic of z = - 3.37 is obtained when testing the claim that p< 0.27. a. Using a…
A: The hypothesis testing can be conducted to infer about the population parameter using the sample…
Q: The desired percentage of SiO, in a certain type of aluminous cement is 5.5. To test whether the…
A: Given that x bar=5.23
Q: Is Cu detectable at a concentration of 0.10 mg/Lin Flame-AAS? Use the data in Table 2. Table 2.…
A: Flame AAS is atomic absorbation spectroscopy. Which is used to detect the various sample i. e.blood…
Q: A dentist wanted to determine if a relationship existed between childhood fluoride exposure and…
A: Let ρ denotes the population correlation between years of fluoride and number of cavities. The test…
Q: Determine (a) the x2 test statistic, (b) the critical value using a = 0.05, and (c a = 0.05 level of…
A: The following is obtained: Categories Observed Expected (O-E)2/E A 99 400 \times 0.25 = 100100…
Q: The desired percentage of Sio, in a certain type of aluminous cement is 5.5. To test whether the…
A:
Q: For question 11- 12 a. What is the null hypothesis? What is the alternate hypothesis? b. What is the…
A: From the given information we conduct T test for one mean.
Q: "With alpha equal to .05, a two-tailed independent-samples t test showed similar number of days to…
A: It is given that the value of p is 0.63 and the level of significance is 0.05.
Q: Based on the data presented below, at an alpha = 0.05, which is true %3D
A: Hypotheses: H0:μ1=μ2=μ3H1: At least one μi is different.
Q: To test the null hypothesis that the population mean is not bigger than 30 at the ten percent level…
A: Solution: Given information: n= 89 Sample size x= 32 Sample variance s2= 64 Sample variance μ= 30…
Q: For each of the following situations, identify whether the appropriate test is a paired t-test (for…
A: Determine whether the given scenario represents the paired t test or two sample t test.. The…
Q: A quality-control technician collects a random sample of 10 rivets of four different suppliers and…
A: Given that, A quality-control technician collects a random sample of 10 rivets from each of four…
Q: To test HO:u=100 versus H1 not equal to 100, a simple random sample of n=21 is obtained from a…
A:
Q: The test statistic of z= -3.32 is obtained when testing the claim that p <0.45. a. Using a…
A: It is given that Test statistic Z = -3.32 Claim : p < 0.45
Q: 11. Find out the likely production corresponding to a rainfall of 40 cms. from the following data:…
A: Regression equation : The equation is written as Y= a + bX, wherever Y is that the variable (the…
Q: Consider the following hypothesis test: Ho: µ = 16 Ha: H # 16 A sample of 50 provided a sample mean…
A:
Q: In an experiment to compare the tensile strengths of I = 6 different types of copper wire, J = 5…
A: From the provided information, MSTr = 2654.3 MSE = 1154.2 The hypotheses are as follow: H0: µ1 = µ2…
Q: Each person in a random sample of 400 residents in a major town was asked whether they had ever been…
A:
Q: The researchers will conduct a test of significance at level a = 0.01 to test if these two species…
A: Given that researchers want to know if there is any significant difference between the life span of…
Q: The sulfate ion concentration in natural water can be determined by measuring the turbidity that…
A: Given : The sulfate ion concentration in natural water can be determined by measuring the turbidity…
Q: A sample of 12 radon detectors of a certain type was selected, and each was exposed to 100 pCi/L of…
A:
Q: Suppose a linear model y=β0+β1xy=β0+β1x is fit to a sample data set, and a test of the null…
A: The linear model is y = β0 + β1x, where y is the dependent variable, x is the independent variable,…
Q: A beer store wanted to test the difference on drinking habits if a younger group of 21-30 years old…
A: Hi, Since, your question has more than 3 parts, we have solved only the first three subparts for…
Q: Find the critical values y6 and x- for the giveh tonfidence level c and sample size n. c= 0.98, n =…
A: We have given that, Sample size (n) = 19 Confidence level (c) = 0.98 Then, We will find the…
Q: Penicillin is produced by the Penicillium fungus, which is grown in a broth whose sugar content must…
A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: For the same data set above, if we set our alpha .01, find the critical r from the table:
A: It is given that Number of observations n = 15 SSx = 4, SSy = 25 and SP = 6
Q: A real estate company is interested in testing whether, on average, families in Gotham have been…
A:
Q: The Board of Transportation and Safety (BTS) wants to examine the safety mechanisms of A, B, and…
A: Test Hypotheses: There are 3 types of cars. Denote the true average of the three types of cars A, B…
Q: Match the hypothesis, sample sizes and alpha to the critical value(s) 12; N1= 23; N2 = 31; a =0.05…
A: Match the hypothesis sample sizes and alpha to the critical value(s)
Q: If, in a sample of n=20 selected from a normal population, X = 54 and S = 12, what is your…
A: From the given information, Sample size n =20 Sample mean, x̅=54. Sample standard deviation, S=12…
Q: Assume you choose a level of significance of a = 0.05, what is the critical value? 2.064 O 1.318 O…
A:
Q: Score: 0 of 1 pt 12 of 28 (12 complete) Instructor-created question Course Note Packet Chapter 9…
A:
Step by step
Solved in 2 steps with 2 images
- andres asked if there is a relationship between the quality of sneakers worn by a sample of 20 volleyball players and their average number of point scored per game. he computed r= +.21 and immediately claimed he had evidence that better-quality sneakers are related to better performance (a) is his claim correct? why? (b) what are Ho and Ha? (c) with alpha=.05, what is rcrit ?A dentist wanted to determine if a relationship existed between childhood fluoride exposure and cavities. She took a sample of adults in her practice and counted how many cavities each person had in his or her permanent teeth. She also determined how many years of childhood each person was exposed to tap water with fluoride. The minimum value on this variable was 0 and the maximum was 18. Using the data below, an alpha of .05 and a two-tailed test, was there a significant relationship? Years of fluoride Number of cavities 0 10 18 1 2 7 12 3 3 4 10 5 M = 7.5s =6.98 M = 5.00s = 3.16If the value of Cronbach’s alpha is 0.07, it means ___________; a. Research instrument is not reliable b. Research instrument is internally consistent c. Data is reliable d. Data is internally consistent
- Are seatbelts effective at saving lives? We wish to examine whether or not the use of seatbelts reduces fatalities at the alpha = 0.05 level of significance. Let p N represent the proportion of non-seatbelt wearing passengers who were involved in a crash and died and represent the proportion of seatbelt wearing passengers who were involved in a crash and died. 1. Which would be correct hypotheses for this test? H 0 :p N =p Y ,H 1 :p N <p Y O H 0 :p N =p Y ,H 1 :p N ne p Y H 0 :p N =p Y ,H 1 :p N > mathfrak P Y O H 0 :p N ne p Y , H 1 :p N >p Y In a random sample of 335 non-seatbelt wearing passengers involved in a car crash, 34 were killed. In a random sample of 398 seatbelt wearing passengers involved in a car crash , 18 were killed. 2. Find the test statistic (2 decimal places) 3. Give the P-value (4 decimal places) please only answer 2 and 3!A study assessed the lung destructive index among smokers and non- smokers provided the following data Smokers : overline x 1 =14.5 n 1 =12 S P =2.50 Non- Smokers: overline x 2 =9.5 n 2 =10 a = .05 From the available data, can we conclude that smokers have greater lung damage than non-smokers?As we have noted in previous chapters, even a very small effect can be significant if the sample is large enough. Suppose, for example, that a researcher obtains a correlation (computed from the raw data) of r = 0.60 for a sample of n = 10 participants. (4 pts. total) Is this sample sufficient to conclude that a significant correlation exists in the population? Use a two-tailed test with α = .05. In your response, be sure to specify the critical value for r.
- Arandom sample of 450 observations produced a sample proportion equal to 0.38. Find the critical and observed values of z for the following test of hypotheses using alpha = 0.025 . H 0 :p=0.30 versus H 1 :p not equal to 0.30In a comparison of two methods for the determination of chromium in rye grass, the following results were obtained: Method A, mean(mg/kg Cr)=1.48 Standard deviation(mg/kg Cr)=0.28 n= 6 Method B, mean (mg/kg Cr)=2.33 Standard deviation(mg/kg Cr)=0.31 n=10 Is the precision of these two methods significantly different? Do these two methods give results with means which differ significantly? a=0.05CONSIDER that the data is UNCORRELATED use alpha .05. Provide the following: 1. CI of the F value 2. Statistical Interpretation
- If the test of H0: = 19 against Ha: ≠ 19 based on an SRS of 15 observations from a Normal populationproduces the statistic of t = –1.75. The P-value isFor each of the following situations, identify whether the appropriate test is a paired t-test (for parameter µd) or a two-sample t-test (for parameter µ1 - µ2). Briefly explain your answer. Sixty students were matched by initial pulse rate, with the two with the highest pulse forming a pair, and so on. Within each pair, one student was randomly chosen to drink a caffeinated beverage, while the other one drank an equivalent amount of water. Their pulse rates were measured 10 minutes later, to test whether caffeine consumption elevates pulse rates. To determine whether lack of sleep increases appetite, researchers recruited 50 volunteers and randomly assigned 25 of them to sleep at least 8 hours a night and the other 25 to sleep at most 5 hours a night, for 3 days. Calorie intake was recorded for all 50 volunteers for the 3-day period.Below are the results for a One Way ANOVA analysis. The critical value was 2.7 and alpha = .05. Which of the following statements is true? A) The result is statistically significant because F ratio of 3.83 > critical value of 2.7 B) The result is statistically significant because p < .05 C) The result is not statistically significant because p < .05 Both A & B