For an independent t test with equal variances, n1= 24, n2= 28, S1= 8, S2 = 9 Find the correct degrees of freedom for the test? 1) 23 2) 50 3) 48 4) 27

Q: Out of first 20 natural numbers, one number is selected at random. The probability that it is either…

A:

Q: Express the confidence interval (660.1,710.7) in the form of ¯x ± ME ¯x ± ME= _____ ± ______

A: The given confidence interval is (660.1, 710.7).

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A: Given n=86 X-bar=33.71 S=5.33

Q: The test statistic of z= 2.66 is obtained when testing the claim that p *0.126. a. Identify the…

A: GIVEN DATA, test statistics of Z=2.66claim:p≠0.126we have to answers of parts a,b,c for the given…

Q: 2. The following table table gives the joint probability distribution of X and Y. Find the mariginal…

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Q: Out of first 20 natural numbers, one number is selected at random. The probability that it is either…

A: The first 20 natural numbers are1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,…

Q: Many members of a certain workforce died from cancer supposedly resulting from exposure to…

A: Note: We are supposed to solve only one question at a time. Please repost the other question…

Q: ´,. If f (x, y)= kxye-(x2 + y2), x ≥, y0 ≥ 0 is the joint pdf, find k.

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Q: Listed in the accompanying table are weights (kg) of randomly selected U.S. Army male personnel…

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Q: A random variable X follows a Standard Cauchy Distribution if its pdf is given by 1 fx(x) = ,x ER…

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A: Given  98% confidence interval for population mean μ is (14.3,28.9)

Q: The average UQ student reports dedicating 8.5 hours per week to each 2-unit course.  What is the…

A: Given, sample size (n) = 20 sample mean (x̄) =  10 sample variance (s2)  = 9 sample standard…

Q: Using Table VI in Appendix C, find to 3 decimal places the value of x² for 5 degrees of freedo (a)…

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Q: You are conducting a multinomial hypothesis test (a 0.05) for the claim that all 5 categories are…

A: Solution:  Given information: k=5 Categories  n=18+25+13+9+9= 74 Sample size

Q: Assume that a set of test scores is normally distributed with a mean of 110 and a standard deviation…

A: Empirical rule of probability:- Approx. 99.7% of the data lies between ± 3 SD limit of mean μ  ±3 σ…

Q: Assume that the readings at freezing on a bundle of thermometers are normally distributed with a…

A: Solution : We have given that, The readings at freezing on a bundle of thermometers are normally…

Q: In a survey, 31 people were asked how much they spent on their child's last birthday gift. The…

A: Given information: sample size, n=31sample mean, M=36sample standard deviation, s=10 t critical…

Q: Identify the type I error and the type Il error that corresponds to the given hypothesis. The…

A: Type I error: Type I error is "rejecting the null hypothesis when actually it is true". Given claim:…

Q: Calculate the incidence of CHD in older men

A: The information provided in, the question is as follows : A number of men Bald and CHD : Older…

Q: D and E

A: Given  x denotes the time in hours of adults working in an organization μ = 1760 hoursσ = 380 hoursn…

Q: The Hungry Person restaurant has posted its sales (in thousands of dollars) for the last two years.

A: a) Excel Procedure: Enter the data for month-year and sales in Excel sheet Select the columns of…

Q: A wildlife biologist is interested in comparing the mean number of miles flown per day by two types…

A: given data x¯ = 131.8s1 = 10.3n1 = 31x¯2 = 129.5s2 = 11.5n2 = 36hypothesisH0 :  μ1 = μ2H1 :  μ1 <…

Q: Consider a drug testing company that provides a test for marijuana usage. Among 268 tested subjects,…

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Q: The manufacturer of a certain candy states that 13% of the candies are brown, 24% yellow, 14% red,…

A: by bartleby policy i can gives only 3 subparts at a time From given data we have : 13% brown 24%…

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A: Givensample size(n)=4658x=105Cofidence level=95%

Q: Day    Frequency Sunday    40 Monday    40 Tuesday    27 Wednesday    42 Thursday    42 Friday    51…

A: From given data we have : Expected fraction  Observed Count sunday 40 monday  40 Tuesday 27…

Q: A simple random sample is drawn from a population that is normally distributed. The sample mean is…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: You wish to test the following claim (H1H1) at a significance level of α=0.01α=0.01.…

A: The given hypothesis is H0:μ=63.6 Versus Ha:μ≠63.6.

Q: Suppose that we have a sample space with five equally likely experimental outcomes: {E1,E2, E3, E4,…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: confidence interval at a 95% confidence level. Assume the data came from a normally distributed…

A: Given that  n = 20 , s = 6

Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 4. How many…

A: given data σ = 195% ci for μ. E  = 0.014n= ?

Q: Claim: More than 3.9% of homes have only a landline telephone and no wireless phone. Sample data: A…

A: Given that  p = 3.9% = 0.039 ,  Claim: more than 3.9% of homes have only a landlines telephone and…

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A: Solution-: Given: n=23,p=0.42 We want to use the normal approximation to the binomial. Then use the…

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A: Given tha ,  p = 10.9% = 0.109  X = 210 , N = 1782

Q: Claim: Fewer than 91% of adults have a cell phone. In a reputable poll of 1167 adults, 85% said that…

A: Given that  p = 91% = 0.91 , q = 1 - p = 1 - 0.91 = 0.09 n = 1167 , p^ = 85% = 0.85

Q: A data set includes 103 body temperatures of healthy adult humans having a mean of 98.9°F and a…

A: Given information- Sample size, n = 103 Sample mean, x-bar = 98.9 ℉ Sample standard deviation, s =…

Q: Question #3  Samples of body temperatures were collected for a group of women and a group of men.…

A: Given Information: Women: Sample size n1=15 Sample mean x¯1=98.38 Sample standard deviation s1=0.45…

Q: The relationship between the number of games won by an NHL team and the average attendance at their…

A: The following information has been provided: The regression model is : attendance^=-2600+225 wins.…

Q: The first 8 alphabets are written down at random. what is the probability that the letters b,c,d,e…

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Q: The nicotine content in cigarettes of a certain brand is Normally distributed with standard…

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Q: The test statistic of z=0.87 is obtained when testing the claim that p > 0.4. a. Identify the…

A: GivenTest statistic(z)=0.87claim is that p>0.4

Q: Five different oat varieties were planted in each of the four fields. The following crops were…

A: This experiment has two factors-Field and Oat variety. There are four levels of field and five…

Q: Many high school students take the AP tests in different subject areas. In one year, of the 144,241…

A: given data  n1 = 144241   x1 = 84000p^1 = x1n1 = 84000144241 = 0.5824 n2 = 211725    x2 = 122644 p^2…

Q: Data on U.S. work-related fatalities by cause follow. Assume that a fatality will be randomly chosen…

A: The probability of an event is calculated by using the formula,  P(Event) = (Number of outcomes…

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Q: sure

A: Question : With an alpha level set at 1%, retaining the null hypothesis means that ?

Q: Toss a coin twice. Find the probability of getting 1 head. (In this course, I head is taken to mean…

A: If a coin is tossed twice than the possible outcomes areS={HH, HT, TH, TT}T=tailH=head

Q: Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and…

A: given data  standard normal distribution  Z~N(0,1)  P(x<Z) = 0.2061 Z = ?

Q: The joint p.m.f of (X,Y) is given by P(x, y) = 2x + 3y), x =,1,;02y = ,13,.2.Find the marginal…

A: