Explain the preparation and validation of instruments in research.
Q: A car company claims that its new SUV gets better gas mileage than its competitor’s SUV. A random…
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Q: you develope a way to Measure anger people. Test the Claim that the mean. for etler Of anger for…
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Q: you created a survey that measue Depression In you want to test people. the Claim that the mean.…
A: Solution-: Given: x¯=6.7,μ0=6.5,n=145,s=1.5 We test the claim that the mean measurement of…
Q: 61 57 58 57 61 64 68 51 49 64 50 48 65 52 62 55 54 48 58 64 55 55 54 42 51…
A: Mean, Median and Mode are the measure of central tendency. Mean is the average measure of…
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A: Given Data: 55, 59, 57, 59, 58, 60, 57, 56, 58, 61, 58
Q: If two samples each have s2 = 30, then the pooled variance will be equal to ___, if the sample…
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Q: Suppose Zi and Z2 are independent sta P(Z <1,Z <1).
A: We have given that the Z1 and Z2 are independent standard normal random variables.
Q: According to the American College Review, average tuition at a 4-year private college is $15,658…
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Q: Determine if it's independent or dependent: • before and after the treatment • individual who…
A: In statistics, variables are classified broadly into two categories: 1. Independent Variables. 2.…
Q: Suppose that Y, and Y, are uniformly distributed over the triangle shaded in the accompanying…
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Q: A distribution of values is normal with a mean of 137.2 and a standard deviation of 46.9. Use exact…
A: From the provided information, Mean (µ) = 137.2 Standard deviation (σ) = 46.9 X~N (137.2, 46.9)
Q: It is suspected that a supplier systematically underfills a certain brand of detergent canisters. A…
A: Given that Sample size n =15 Sample mean =4947.2 Standard deviation =31.6 NOTE:- According to…
Q: . A poll of 1155 Americans showed that 47% of the respondents prefer to watch the news rather than…
A: Given that Sample size n =1155 Sample proportion p^=47%=0.47
Q: Instructions: Read the problem carefully and solve for what is being asked. Employees Companies 1.…
A: For the given table Find Third quartile =? 4th decile =? 85th percentile =?
Q: 1. a) If then find the following probabilities. i) ii) b) Obtain 95%…
A: Note: According to Bartleby expert guidelines, we can answer only first question with their three…
Q: How many individuals are described in this table? How many females were among the respondents? The…
A: Given that Opinion Female Male Almost no chance 138 106 Some chance but probably not 162…
Q: Company XYZ know that replacement times for the DVD players it produces are normally distributed…
A: From the provided information, Mean (µ) = 5.7 Standard deviation (σ) = 1.5 X~N (5.7, 1.5)
Q: cortisol_level” of excel file “exer3_data.xlsx”. R outputs can be found in the file…
A: Given Information: A study was conducted to determine the effect of different types of feed…
Q: n a Sample of 846 patients 15 was fend that 68% Of them hael a cerfin pisease..Test Claim that the…
A: For the given data Perform z test for one proportion
Q: A researcher wants to study the impact of a new artificial sweetener on blood glucose. Participants…
A: We have given the experiment about the sweetener on blood glucose.
Q: One study claims that the variance in the resting heart rates of smokers is different than the…
A: Given that Sample sizes n1=9 , n2=9 Sample variance s12=480.7 , s22=131.6
Q: Suppose there is a claim that a certain population has a mean, u, that is different than 7. You want…
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Q: For a set of data, μ = 71, X=35, z = -0.60. What is the standard deviation of the population?
A: Given that. X~N( μ , ?^2 ) μ=71 , ?=? , X=35 , z=-0.60 Z-score =( x - μ )/?
Q: Analyzing One and Two Variable Data
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Q: In a state's Pick 3 lottery game, you pay $1.42 to select a sequence of three digits (from 0 to 9),…
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Q: Three cards are drawn in succession from a deck without replacement. What is the probability that…
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Q: A sample of n = 64 scores has a mean of M = 45 and an estimated standard error of 3 points. What is…
A: According to the given information in this question We need to calculate the sample variance
Q: What is the chi-square test-statistic for this data?
A: here given data for 4 category
Q: Does the lifespan of a shark depend on the species of shark? It is known that the lifespan depends…
A: 110. Null Hypothesis: H0: The four species of shark have same means. Alternative Hypothesis: H1: The…
Q: A binomial distribution has a mean of µ = 20 for a sample of n = 100. What is the value of p? Select…
A: From the provided information, The mean of binomial distribution (µ) = 20 Sample size (n) = 100
Q: Assuming that the Entrance Test scores of Grade 6 students are normally distributed with a mean of…
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Q: Where is the potential outlier (use x,y coordinates)? 13 12 11 10 9. > 8 7. 4 3. 3. 4 7 9 10 4, 5 5,…
A: Where is the Potential outlier ?
Q: Many people think that a national lobby's successful fight against gun control legislation is…
A: We have given that, Favorable cases (X) = 2250 and sample size (n) = 4000 Then, We will find the…
Q: P1 91 P2 92 X1 X2 for z =2.575, x, = 44, x, = 89, n, = 49, n, = 106, p, n2 q, = 1-P,. P2 n2 and q, =…
A: We have given that, X1 = 44, n1 = 49 and X2 = 89, n2 =106, z* = 2.575 and p̂1 = X1/n1, p̂2 =…
Q: find the probability when X is less than equal to 1
A: We have given that Sample size n = 7 favourable cases x = 3 P( defective ) = p = 3/7
Q: Here is a bivariate data set. x y 38 34 32 49 34 52 30 65 32 58 26 66 33 49 35 40 29 54 Find the…
A: Given that X Y X \cdot YX⋅Y X^2X2 Y^2Y2 38 34 1292 1444 1156 32 49 1568 1024 2401…
Q: The following table shows retail sales in drug stores in billions of dollars in the U.S. for years…
A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…
Q: Correlation studies are often used to help determine whether certain characteristics are controlled…
A: (a) Obtain the correlation between the variables children and their birth parents. Use EXCEL to…
Q: For this study, we should use The null and alternative hypotheses would be: H0:H0:…
A: Given that Hypothesized Population Mean (\mu)(μ) = 10.510.5 Population Standard Deviation…
Q: n equal to 0.0145 a 95% confidence that pportion of children road traffic lies betwee 11.18% II pr…
A: Random Samples of 345 cases taken R output is given We have to analyze the result and have to choose…
Q: A set of X and Y scores has a regression equation with a slope of b = 4. If the mean for the X…
A: A set of X and Y scores has a regression equation with a slope of b = 4. If the mean for the X…
Q: Given M1 = −5, s1 = 4.6, n1 = 72, M2 = − 1, s2 = 3.3, and n2 = 60, calculate t.
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Q: If you want to reduce the amount of variance present in an independent-measures (one-way) ANOVA, you…
A: ANOVA is a parametric inferential procedure.
Q: Calculate the indicated probabilities, assuming that Z is a continuous random varia that follows a…
A: Let Z be the continuous random variable from normal distribution with mean = 0 and standard…
Q: Recent re. more likely to cheat than their less creative cou sheets for computer scoring. However,…
A: Given that
Q: The R&D department of a paint company has developed an additive that it hopes will increase the…
A: For the given data Perform t test for one mean
Q: In a program designed to help patients stop smoking, 179 patients were given sustained care and…
A: We perform one-proportion hypothesis test to test the claim about a population proportion.
Q: You are conducting a test of independence for the claim that there is an association between the row…
A: Given data X Y Z A 45 6 60 B 28 3 28
Q: A basketball coach believes that the variance of the heights of adult male basketball players is…
A: For the given data Perform F test for the equality of two population variances
Explain the preparation and validation of instruments in research.
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- Explain the procedures used to measure reliability and validity of dataWhat is the difference between defining a research problem and developing a hypothesis?What are the two most important questions/concepts that are foundational to statistical practice and understanding in doing any type of research, data analysis, or data exploration?