Independent random samples were selected from each of two normally distributed populations, n1 = 6 from population 1 and n2 = 4 from population 2. The data are shown in the following table %3D Sample 1 Sample 2 3.1 4.3 2.3 1.4
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Q: Bighorn sheep are found in the mountainous western United States. In the following data, x = the…
A: y¯ is calculated as: y¯=∑yn=86.95=17.38
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A: Used paired distribution of difference of mean to calculate the test statistic
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A: Given: Julius conducted a very small study of the amount of sleep his dorm mates get each night and…
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A: Given: ∑ x = 15 ; ∑ y = 86.9 ; ∑ x 2 = 55 ; ∑ y 2 = 1544.73 ; ∑ x y = 273.4
Q: Bighorn sheep are found in the mountainous western United States. In the following data, x = the…
A: The formula for Sxy is, Sxy=∑xiyi-∑xi×∑yin
Q: Compute the variance for the following data set. State your result as a decimal value with two…
A: The values are 1, 2, 3, 4, 5, 6. Variance can be calculated using the formula.
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A: It is an important part of statistics. It is widely used.
Q: n this population data : (1, 2, 3, 4) what is the Standard Error when a sample size of 3 is drawn.
A: Here use standard error formula with finite population
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A: The number of observations is n = 8.
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A: Given, Two samples are given, Testing of hypotheses are, H0 : μ1= μ2 There is no significant…
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A: Given: Population A Variance, s12=36 Sample Size, n1=30 Population B Variance, s22=25 Sample Size,…
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A: x (x-xbar)^2 3.98 0.388544 3.78 0.179211 2.95 0.165378 3.55 0.037378 3.44 0.006944 3.08…
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Q: What is the mode for this data set
A: The data that has the highest frequency is called mode. In other words, it is the most frequent…
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A: Given, test statistic (t) = -1.259 population mean (µ) = 12 sample size(n) = 16 degree of freedom…
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A: The women who first married in their twenties were randomly divided into three groups: A, B and C.…
Q: Bighorn sheep are found in the mountainous western United States. In the following data, x = the…
A: The formula for Sxx is, Sxx=∑x2-∑x2n
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A: Independent samples: When the observations of one sample does not depend, influence or effect the…
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A: Given Data :
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A: Given info: A medical researcher randomly assigns 100 high-risk heart patients into two groups. One…
Q: Bighorn sheep are found in the mountainous western United States. In the following data, x = the…
A: For x: Sample Meanm is calculated as: Sample Meanm=∑xn=155=3
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- A consumer magazine wants to compare the lifetimes of ballpoint pens of three different brands (measured in days). The magazine takes a random sample of pens of each type in the following table. What is the correct test statistic? Brand 1 Brand 2 Brand 3 382 181 238 242 140 257 216 162 241 319 218 213 a. F (2, 9) = 5.54 b.r = -.34 c. t (11) = 12.16 d.p = .027A one-way ANOVA was conducted at ? = 0.05. The study involved three (3) different groups with 12 subjects in each. The means for each group were as follows: ?1 = 10.92, ?2 = 13.83, ??? ?3 = 14.92. The sum of squares values is shown in the table below.Julius has conducted a very small study of the amount of sleep his dorm mates get each night. He believes that those who are on one of the school’s sports teams will get more sleep (measured in hours per night) than those who are not. Julius surveyed 12 people. Of these, 6 played on a sports team and 6 did not. The descriptive statistics from his survey are given below. PLAYS SPORTS (Sample 1) DOES NOT PLAY SPORTS (Sample 2) 8 6 9 6 8 5 7 7 8 7 7 6 What is the critical value for this test? what is the t-obtain value for this t-test? Based on your t-obtained value, what should you conclude about the null hypothesis for this test?
- Please provide an explanation :)Which of the following can increase effect size? Select one: O a. increase the distance between means and increase the sample size O b. decrease the variability and increase the distance between means O c. decrease the variability and increase the sample sizeThe variance for the sample of student marks given in following table is: number marks of student 1-5 2. 6-10 3 11-15 6. 16-20 10 21-25 4. Total 25 Select one: a. 33.5 b. 19 O C. 24.12 d. 32.16
- The age of first marriage for women who responded to a survey by the CDC between 2006 and 2010 is used here. The women who first married in their twenties were randomly divided into three groups: A, B, and C. The ANOVA output is supplied below: Count NAS (Missings) 3773 group Count A 1288 B 1246 C 1239 Frequency Source DF 2 group Residual 3770 28 26 24 Response Variable (age) Summary Mean 22 20 T 0 Group Variable Summary NAS Mean (Missings) 23.73787 A 0 23.76941 0 23.77929 0 23.66344 ANOVA Table: age-group Sum of Squares 10.283 26969 Mean Square Std. Dev. Std. Dev. 2.674442 B F Value Pr>F MSG 0.71875 0.48743 MSE Age of First Marriage in 20's 2.728097 2.664101 2.628699 CThe Analysis of Variance. A research study compared beer consumed daily between 3 groups with 3 observations each. Group1 was UCB, Group 2 UCSD, and Group 3 UCI. Determine if there is a significant difference among the groups 5% level. Group1: UCB Group 2: UCSD Group 3: UCI The Results of this study are in the following table: Group1 Group2 Group3 Sample 3, 4, 5 3.2, 4, 4.2 3, 4, 3.3 Mean 4.0 3.7 3.4 S^2 4.4 5.2 6.1 null and alternative hypotheses are Null hypothesis Ho : There is a significant difference among the treatment group means Alternative Hypothesis Ha : At least one group mean is different from other group means the average mean due to treatments are…Let x be the average number of employees in a group health insurance plan, and let y be theaverage administrative cost as a percentage of claims. The following data is based on a randomsample:x 5 7 15 25 35y 40 35 30 20 25a. Plot a scatter diagram of the above data.b. Estimate the sample correlation coefficient r as positive, zero, or negative.c. Interpret your results from parts a. and b.
- Are America's top chief executive officers (CEOs) really worth all that money? One way to answer this question is to look at row B, the annual company percentage increase in revenue, versus row A, the CEO's annual percentage salary increase in that same company. Suppose that a random sample of companies yielded the following data: B: Percent for company 5 8 13 16 14 20 4 13 A: Percent for CEO 2 –1 3 14 19 17 3 9 Do these data indicate that the population mean percentage increase in corporate revenue (row B) is different from the population mean percentage increase in CEO salary? Use a 1% level of significance. Are the data statistically significant at level α? Will you reject or fail to reject the null hypothesis? choose one: a) Since the interval containing the P-values has values that are smaller than the level of significance, the data are statistically significant and so we reject the null hypothesis. b) Since the interval containing…A sample of the monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical distribution. The sample mean is $150 and the variance is $400. Using the Empirical Rule, about 95 percent of the monthly food expenditures are between what two amounts? Select one: $85 and $105 Ob. $205 and $220 O $110 and $190 Od. $100 and $200The data to the right are from independent simple random samples from three populations. Determine each of the following. Sample 1 Sample 2 Sample 3 3 3 3 a. SSTR b. MSTR c. SSE d. MSE e. F 4 2 1 8 a. SSTR= (Round to three decimal places as needed.) b. MSTR = (Round to three decimal places as needed.) c. SSE = (Round to three decimal places as needed.) d. MSE = (Round to three decimal places as needed.) e. F = (Round to three decimal places as needed.)