What is a chi-square distribution? b.What is the purpose of chi-square distributions?

Q: In a normal distribution: The shape of the distribution is [ Select ] the dispersion is [ Select ]…

A: # The sahpe of distribution is Bell shaped

Q: 1. Which one of the following Chi-Square distribution is incorrect. Ans: a. As the number of degrees…

A: Mean and median can't be same at 24 d.f. for Chi-square distribution.

Q: Assume that the amounts of weight that male college students gain during their freshman year are…

A: Given : Let X : Amount of weight that male college students gain during their freshman  X~N(μ=1.4 ,…

Q: For a Poisson distribution with a mean value of 25, the coefficient of variation and the coefficient…

A:

Q: how would you describe this distribution in terms of skew (positive, negative , or no skew)

A: The data is given on the number of hours the children spend watching TV every weekend.Given…

Q: What is the 20.33th percentile of a standard normal distribution? Hint: Have you forgotten what a…

A: The standard normal variable is z, which follows normal distribution with mean 0 and standard…

Q: Which of the followings is NOT a correct statement about fourth-spread? O a. Conceptually, it is…

A: Fourth spread: Fourth spread is used to find the measure of variability of distribution. It is…

Q: A San Diego interviewer has found that one in five people approached will agree to take part in her…

A:

Q: a) Does the "mean" of the sampling means always equal to that of the population mean? Discuss b) As…

A: a) The sampling distribution of the mean can be defined as the distribution of all the samples of a…

Q: a. The probability is_______. ​(Round to four decimal places as​ needed.)   b. The probability is…

A: (a)   Obtain the probability that an individual distance is greater than 215.00 cm   The probability…

Q: In a very large population, the distribution of annual income is skewed, with a long right tail. We…

A: Option D) is correct. D. will not resemble a Normal distribution whatever the value of n.

Q: 5. Chi-Square is the study of what type of distribution? (a) Skewed-Right (b) Skewed-Left (c) Normal…

A: Given: Study of Chi-square distribution

Q: Weights (kg) of 120 students who have undergone health screening are as follows: Weight (kg)…

A: Class Interval Frequency (f) Class mid point (x) (f.x) 40-44 4 (40+44)/2= 42 168 45-49 9 47 423…

Q: a(n)____________ distribution is a symmetrical distribution where the proportion of scores in each…

A: Normal distributoin is symmetric about its mean and every score of normal distribution will have its…

Q: (a) The area to the right of Z=0.99 is (Round to four decimal places as needed.).

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: Which of the following is most related to the symmetry of normal distributions? A. The percentage…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

Q: A recent survey reported that 37% of 18- to 29-year-olds in a certain country own tablets. Using the…

A: Given,n=6p=0.37A random variable X~Binomial(n=6 , p=0.37)P(X=x)=6x0.37x1-0.376-x  ;   x=0,1,2,....6

Q: Suppose you were performing a single sample hypothesis test for a mean with an unknown population…

A: Sample hypothesis test for mean that isH0 :  with unknown population standard deviation s and sample…

Q: Number of Car Buyers -99.7%- -95%- -68%- 16 20 Price of a Model of a New Car (Thousands) Not…

A:

Q: Number of Car Buyers Not everyone pays the same price for the same model of a car. The figure…

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Q: Which distribution's height begins low, increases until the middle, and then decreases in a…

A:

Q: 5. Which of the following is an appropriate description of the chi-square distribution? A chi-square…

A: CHI-SQUARE DISTRIBUTION (1) Chi-square distribution is right skewed distribution (2) it only takes…

Q: These are sampling distributions from statistics of a random sample taken from normally distributed…

A: Explanation to correct answer: b. Chi-square distribution: This distribution is used to study the…

Q: Green Behavior: Purchasing Habits A recent Harris Poll on green behavior showed that 25% of adults…

A: Given : p₀ = 0.25 , n= 75

Q: II. NORMAL PROBABILITY DISTRIBUTION a. The selling prices of home in a certain community is such…

A:

Q: A property of the Poisson distribution is that the mean equals the _____.   a. median     b.…

A: