Statistics Question
Q: A researcher conducts a hypothesis test using a sample from an unknown population. If df = 30 for th...
A: The degrees of freedom is given as 30.
Q: Todd and Tiff both train pets. Todd trains 30% of pets and Tiff trains 70% of pets. Todd’s pets are ...
A: Given that P(Todd trains)=0.30 P(Tiff trains)=0.70 P(female| Todd) =0.55 P(female| Tiff) =0.65
Q: please answer circled question
A: The provided information are: Population meanμ=6Population standard deviationσ=10Sample size (n) = 3...
Q: he graph of the waiting time (in seconds) at a red light is shown below on the left with its mean an...
A: Given Information: Sample size (n) = 225 And from the first graph, mean μ=18.9 Standard deviation (σ...
Q: The mean points obtained in an aptitude examination is 188 points with a variance of 361. What is th...
A: It is given that the mean is 188 and the variance is 361.
Q: A biologist is studying the composition of birds on a lake and counts 61 ducks, 17 geese, 11 cranes,...
A: In this case, we need to identify the correct option for the given question.
Q: The U.S. Federal Reserve System publishes data on family income based on its Survey of Consumer Fina...
A: Given that the mean pre-tax family income is $85,200. Here 60% of the pre-tax family incomes when ...
Q: Construct a 99% confidence interval for the population standard deviation o at Bank A. min < OBank A...
A: The sample standard deviation of Bank A is obtained using the excel formula '=STDEV.S(A2:A11)'. The ...
Q: A manufacturing machine has a 7% defect rate.If 5 items are chosen at random, what is the probabilit...
A: Here it is given that - Total number of samples(n) = 5 Sample proportion (p) = 7100=0.07 As n and p ...
Q: 4
A: Note that, the population standard deviation is not known. The degrees of freedom is 14 (=n–1). The ...
Q: A group of Industrial Organizational psychologists wanted to test if giving a motivational speech at...
A: Given data: Number of participants, n = 10 The number of sales that was produced by n = 10 participa...
Q: In a particular region, for families with a combined income of $48,000 or more, 17% have no children...
A: Given that, in a particular region, for families with a combined income of $48,000 or more, 17% have...
Q: On a planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of...
A: The provided information are: Population meanμ=112Standard deviationσ=17 Consider X be a random vari...
Q: A psychologist is studying the self image of smokers, as measured by the self-image (SI) score from ...
A: The previous study says that the mean SI score is equal to 85 and it is believed by psychologist tha...
Q: The percent of fat calories that a person in America consumes each day is normally distributed with ...
A: (a) The distribution of X is, Here, X denote the amount spent on lunch. The distribution of X foll...
Q: We find that the correlation between math ability ( and musical aptitude (Y) is r = +.44. The standa...
A: Given, The correlation between math ability ( and musical aptitude (Y) is r = +.44. The standard er...
Q: Define stratified sampling and explain its importance in auditing.How can an auditor obtain a strati...
A: Given: The stratified sampling is explained as below.
Q: A health psychologist wanted to test if discussing the health disparities of a patient with their fa...
A: As we are authorized to answer only 3 subparts for each question and that you haven't specified whic...
Q: Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sam...
A: Mean = 70.5 Standard deviation = 10.9 Sample size = 164 Raw score = 69
Q: Twelve different video games showing substance use were observed and the duration of times of game p...
A: The descriptive analysis is conducted using EXCEL. The software procedure is given below: Enter the...
Q: Given the weekly grocery bills of 10 customers. If the variance of the grocery bill is (16844.72), w...
A: The variance of a sample isσ2=∑i=1nxi-x2n-1 And the standard deviation isσ=σ2
Q: A hypothetical country with a population of 20,000 people annually experiences 2000 births, 1700 dea...
A: Given; Population Size=20,000Number of births=2000Number of deaths=1700Number of immigrants=500Numbe...
Q: A particular fruit's weights are normally distributed, with a mean of 674 grams and a standard devia...
A: Given μ=674σ=20 Let the heaviest 12% of fruits weigh more than 'a' grams. That is, P(x>a)=12%
Q: We find that the correlation between math ability ( and musical aptitude (Y) is r = +.44. The standa...
A: Since, you have posted a question with multiple sub parts, we would solve the first three parts. We ...
Q: On a planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of...
A: Solution: Note: Hello! As you have posted 2 different questions, we are answering the first question...
Q: Suppose that 54% of the population of U.S. voters favors a particular presidential candidate. If a r...
A: Continuity Correction: The binomial and Poisson distributions are discrete random variables, whereas...
Q: Hi I need help with these.
A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...
Q: 3) Let's examine the levels of levels of sodium in the blood. 20 people yield the following results ...
A: Null and alternate hypotheses: The investigator is interested to test whether the population mean is...
Q: s heights are omen meetir Lary changes
A: According to the sum, a survey finds that women's height is normally distributed with mean 63.8 and ...
Q: When taking a 11 question multiple choice test, where each question has 3 possible answers, it would...
A: Given that there are 11 multiple choice question. Each question has 3 possible answers.
Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of ...
A: From the provided information, The records of a casualty insurance company show that, in the past, i...
Q: The amount of time that people spend at Grover Hot Springs is normally distributed with a mean of 67...
A: From the given information, Mean = 67 and standard deviation =16.
Q: A gender-selection technique is designed to increase the likelihood that the baby will be a girl. In...
A: P(Exactly 485 girls out of 925) = binom.dist(485, 925, 0.5, False) [Excel Formula] =0.008784
Q: A farmer has found that in a typical year they earn $75000 from their harvest. In a wet year, they ...
A: Solution: Probability of wet year is 0.30 and probability of drought is 0.20. Thus, probability of ...
Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if...
A: Let Xi : Waste disposed by ith household, i=1,2,...,n, where Xi~N(μ,σ2),i=1,2,...,n. Then we have, M...
Q: 6
A: Determine the mean and standard deviation of the sample data using the given information: Mean=∑Xn=...
Q: Question3 ...
A:
Q: A major hotel chain is constructing a new resort hotel complex in Greenbranch Springs, WestVirginia....
A: Given: A major hotel results in constructing new resort. This will be wooded area in which the natur...
Q: At a raffle, 250 tickets are sold for $4 each for one grand prize of $500 and two prizes of $50 each...
A: There are 250 tickets. The chance of winning a grand prize of $500 is 1/250. The chance of winning a...
Q: Suppose that pulse rates among healthy adults are normally distributed beats beats with a mean of 80...
A: The normal distribution is a symmetrical distribution, i.e. the mean, median, and the mode of the di...
Q: Construct a probability distribution for the sum shown on the faces when two dice, each with 8 f...
A: Given Information: Two dice, each with 8 faces are rolled. Total number of possible outcomes is 82=6...
Q: A rental agent claims that the mean monthly rent, u, for apartments on the east side of town is less...
A: Claim : The monthly rent for a appartmrnt on each side of the town is less than the $750 Apply hypot...
Q: The mean points obtained in an aptitude examination is 188 points with a variance of 361. What is th...
A: Here, the mean is 188 and the variance is 361, i.e., μ=188,σ2=361⇒μ=188,σ=19. Here, if E(Xi)=μ, and ...
Q: Please give answers of my questions that I have uploaded as an image.
A: a is non-zero.
Q: Suppose Gallup wishes to complete a follow-up survey to find out more about the specific type of sto...
A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for yo...
Q: A biologist is studying the composition of birds on a lake and counts 61 ducks, 17 geese, 11 cranes,...
A: The expected frequency is n ×pi The observed and expected frequencies are given below:
Q: Suppose you have just received a shipment of 18 modems. Although you don't know this, 3 of the modem...
A:
Q: The numbers of regular season wins for 10 football teams in a given season are given below. Determin...
A: From the data set, the maximum value is 15 and the minimum value is 2.
Q: Private nonprofit four-year colleges charge, on average, $26,340 per year in tuition and fees. The s...
A: Given: Mean, μ=26340 Standard deviation, σ=7250 X be the cost for a randomly selected college. The d...
Q: According to a poll of adults, about 40% work during their summer vacation. Assume that the true p...
A: From the given information, Sample size (n) = 500 Probability of success (p) or adult work during th...
The range of any data is calculated as
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