When to use t-tests and when to use ANOVA? What are the requirements of independent variables and dependent variables

Q: According to a recent survey, the population distribution of number of years of education for…

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Q: A bank employee receives 4 weeks of vacation every year, including the week between Christmas and…

A: We have to calculate number of ways in taking 3 weeks vacation out 0f 51 week:

Q: The length of human pregnancies from conception to birth is approximately Normal with a mean  length…

A: Mean = 266 Standard deviation = 16 n=7 P(x>270)=?

Q: View Policies Current Attempt in Progress Please use the accompanying Excel data set or accompanying…

A: Given observed frequency distribution is: Value 0 1 2 3 4 Obs. val. 24 30 31 11 4

Q: Use the given information to find the number of degrees of freedom, the critical values x2 and x,…

A: given data  99% ci for standard deviation  s = 65.8 n = 26

Q: Determine the sampling method used in the following situation: The organizer of a real-estate sales…

A: The sampling scheme is given by The names of participants are written on cards and 10 cards are…

Q: pilots has normally distributed weights with a mean U1 138 10 and Click here to view page 1 of the…

A: given data,normal distributionμ=136σ=25.4p(130<x<171)=?

Q: d) Calculate your test statistic. Write the result below, and be sure to round your final answer to…

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Q: 18. The investigation has also determined the following relative risk estimates pertaining to eating…

A: Given data is Effect of drinking without regard to eating pizza  effect of drinking among those…

Q: Chocolate contains caffeine and an endogenous cannabinoid, as well as a chemical that modulates…

A: We will tell you which option is the correct choice.

Q: Instruct a 95% confidence interval to estimate the pulation proportion with a sample proportion al…

A: Given that  Sample proportion p^=0.60 Sample size n =150

Q: QUESTION 38 In hypothesis testing, the tentative assumption about the population parameter is a. the…

A: The given statement is "In hypothesis testing, the tentative assumption about the population…

Q: The concentration of active ingredient in a liquid laundry detergent is thought to be affected by…

A: Given information: Catalyst 1 Catalyst 2 57.9 66.4 66.2 71.7 65.4 70.3 65.4 69.3 65.2…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 268 days…

A: Solution-: Given: μ=268,σ=13 Let, X= The length of pregnancies in a small rural village ∴X→…

Q: 5. )A payment stream that pays a continuous rate of 1.8t2 + 6t at time t is received from time 5 to…

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Q: Art Class No Art Class Total Music Class 165 135 300 No Music Class 315 585 900 Total 480 720 1,200…

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Q: According to United States Department of Agriculture, the average retail price of conventional whole…

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Q: Given the graph where the mean is marked which best valle best Represents the Z-Score Shown L 2 2=2…

A: We have given, The graph and the z-values. We have to find. Which best values showes the graph ?

Q: Of 1000 randomly selected cases of lung cancer, 833 resulted in death within 10 years. Construct a…

A: given  n=1000, x=833  Level of significance=0.05

Q: There are four blood types, and not all are equally likely to be in blood banks. In a certain blood…

A: Given information: The percentage of donations are Type B blood is 20%. P(type B)=0.20 Let X be the…

Q: Find the​ P-value for a​ left-tailed hypothesis test with a test statistic of z=−1.33 Decide whether…

A: It is given that Z = -1.33 Level of significance = 0.05 Test : left-tailed

Q: Can a causal relationship be established between a variable y and a variable x by running the…

A: (i). Yes, the casual  relationship between X and Y can be established by y= f(x). That means Y…

Q: The deflection temperature under load for two different types of plastic pipe is being investigated.…

A: The deflection temperature under load for two different types of plastic pipe is being investigated.…

Q: Each observation in a random sample of 101 bicycle accidents resulting in death was classified…

A:

Q: Describe the basic characteristics that define an independent-measures, or a between subjects,…

A: Solution-: Describe the basic characteristics that define an independent-measures, or a between…

Q: Let X ~ Poisson(10). a) Find P(X >= 7). b) Find P(X = 7).

A: The question is about discrete probability distribution Given : X ~ Poisson ( 10 )   To find : a ) P…

Q: Let XX represent the full height of a certain species of tree. Assume that XX has a normal…

A: Given,mean(μ)=182.5standard deviation(σ)=59.9sample size(n)=79

Q: Researchers ran a multiple linear regression to determine if belief accuracy in a political claim…

A: Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: A continuous random variable X has the probability density function 0, hx - h, 3h-hx, 0, which can…

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Q: or an independent sample t-test, what is the numerator of the t-test equation or the…

A: Given that , For an independent sample t-test, what is the numerator of the t-test equation or…

Q: A particular blood pressure medication is stated to have a 17% chance of producing a certain side…

A: p=17%, n=25

Q: Craik & Tulving ran an experiment to determine how depth of processing during study affects memory.…

A: Validity of the within-subjects designs: A within-subjects design has more power than the…

Q: To investigate the fluid mechanics of swimming, twenty swimmers each swam a specified distance in a…

A: A paired t- test is used to compare the mean difference between two dependent groups for the same…

Q: A researcher reports an independent t-test statistic withdf=20. How many individuals participated in…

A: For t-test  df = 20 N=?

Q: State whether the standardized test statistic z indicates that you should reject the null…

A: (a) Z=1.947  (b) Z=2.043  (c) Z=-1.769

Q: 29.2 ming that fuel efficiency is normally distributed under these circumstances, do the data…

A: Given that  Sample size n =6 Population mean =30 Level of significance =0.05

Q: Please answer both parts, they are the same question. Hotel Cabo de Gata Vista Cap d'Agde Resort…

A: Introduction: Since the overall satisfaction rating is being predicted using the satisfaction…

Q: Come the qu NI Calculate the five number Summary of the given data Use the A approximation method…

A: According to the given information in this question We need to find five numbers summary

Q: The authors of a paper compared two different methods for measuring body fat percentage. One method…

A: From the provided information, Sample size (n) = 16 Confidence level = 95% The difference table is…

Q: Three potential employees took an aptitude test. Each person took a different version of the test.…

A: Calculate the standard score (z score ) and look for closet to mean z score.  z=x-μσ/n

Q: Suppose the mean income of firms in the industry for a year is 30 million dollars with a standard…

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Q: Which of the following can be used by the researcher to decrease the width of the confidence…

A: We have to determine the factors that will lead to decrease the  width of confidence interval.

Q: The critical value of t for a two-tailed test with 10 degrees of freedom using a = .05 is O a.…

A:

Q: QUESTION 22 In an interval estimation for a proportion of a population, the value of z at 99.2%…

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Q: The following table shows the number of used cars sold each day over the last 25 business days at…

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Q: 5.1 Consider the multiple regression model y₁=xB₁+x₂ + xpB₂ +€₁ with the seven observations on y,…

A: The given data are as follows: yi xi1 xi2 xi3 1 1 0 1 1 1 1 -2 4 1 2 2 0 1 -2 1 1 1 1…

Q: Past experience has indicated that the breaking strength of yarn used in manufacturing drapery…

A: Using Statistical table , Using z table (area to the left ) , To see the z-score (Z-critical value)…

Q: Using R, plot the gamma density function with parameters a = 2.2, 5= 1.3 on interval (0,7).

A: Gemma is continuous distribution.

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 7.9 inches,…

A: A manufacturer knows that their items have a normally distributed length, with a mean of 7.9 inches,…