A It is the assumption that the variances for levels of a repeated-measures variable are equal. B C following statements about the assumption of sphericity is not true? D It is tested using Mauchly's test in SPSS. It is automatically met when a variable has only two levels. It is not assumed by multivariate tests.

Q: University officials hope that changes they have made have improved the retention rate. Last year, a…

A: Hypothesis is an assumption that is being tested.

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A: The t-test is used to understand the mean significance between the variables. It is used when the…

Q: The amount of time that people spend going through airport security at a busy airport is normally…

A: Answer: From the given data, Mean (μ) = 25 Standard deviation(σ) = 4.8 X follows normal…

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A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: A bank received on average 9 bad cheques per day, what is the probability that the bank will receive…

A: Answer: From the given data, Average rate of bad cheques (λ) = 9 X follows Poisson distribution(λ) X…

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A: It is given that the weight gain is normally distributed with average of 1.75 pounds per day and a…

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A: The sample mean is 3.3, sample size is 12, population standard deviation is 0.9 and the population…

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Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Population proportion p=0.23 Margin of error =E =0.06

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A: Here Given  Claim is Mean length of game is more than 1.6 hours.

Q: 1. Generate random 100 MVN data, p=20. The covariance matrix should be positive semi- definite…

A: This problem involves generating a matrix of 100 multivariate normal (MVN) data points with 20…

Q: Listed in the data table are IQ scores for a random sample of subjects with medium lead levels in…

A: The CI gives range of values in which the population parameter lies with certain confidence.

Q: A golf analyst claims that the standard deviation of the 18-hole scores for a golfer is at least 3.5…

A: We have given that, a golf analyst claims that the standard deviation of the 18-hole scores for a…

Q: The manager of a coffee shop is trying to determine if drive-through customers buy fewer items than…

A: z-score=-1.805p-value=0.0359

Q: An SRS of 350 high school seniors gained an average of ?¯=45 points in their second attempt at the…

A: n = 350x¯ = 45σ = 2690% ci for μ = ?

Q: The percent of employees' salaries that surpassed $834 is%. √ B

A:

Q: The following data gives the number of hours 7 students spent studying and their corresponding…

A: Let, x: Hours spent studying y: Midterm grades The data is given as- x y 1.5 69 2.5 72 3 78…

Q: Find the margin of error for the given data values of c,s and n C = 0.95, s = 520 and n Round to two…

A: Answer: From the given data, Sample size(n) = 62 Standard deviation(S) = 520 Confidence interval (c)…

Q: In order to improve the production time, the supervisor of assembly lines for a manufacturer of…

A: The z score is also known as the standardized score. If the data follows normal distribution then…

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Q: A pipes manufacturer makes pipes with a length that is supposed to be 11 inches. A quality control…

A: The question is about hypo. testing Given : Popl. mean length of pipe ( μ ) = 11 inches Randomly…

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A: Answer: From the given data, We have to calculate P(0.8 < Z < 1.3) Here, Z denotes the…

Q: 1) Are low-fat diets or low-carb diets more effective for weight loss? A sample of 78 subjects went…

A: There are two independent samples which are low-carbohydrate diet and low-fat diet. We have to test…

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A: Solution-: Given: x¯=83.97,n=76,σ=13.89  Use this information to construct the​ 90% and​ 95%…

Q: An airline estimates the average weight of a passenger to be 185 pounds, including luggage. Assume…

A: Population mean, μ=185 Population sd, σ=40.0

Q: The operation manager at a tire manufacturing company believes that the mean mileage of a tire is…

A: The question is about central limit theorem Given : Popl. mean mileage of a tire ( μ ) = 40097 miles…

Q: W Use the accompanying radiation levels in kg different cell phones. Find the percentile P70- for 50

A: Here given different 50 cell phones radiation level. n = 50

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A: standard normal distribution Z~N(0,1) P(-1<z<zc) = 0.8322 A = ?

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A: Given sample observations are:

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A: Suppose at a car wash, cars arrive randomly and independently. The probability of an arrival is the…

Q: Use the given confidence interval to find the margin of error and the sample mean. ​(4.63​,8.15​

A: Confidence interval is  ​(4.63​,8.15​)

Q: Find the mean and variance using the following parameters of a binomial distribution, n = 32 and…

A: Answer: From the given data, The parameters of a binomial distribution are given as, n = 32 p = 0.26

Q: According to the National Sleep​ Foundation, children between the ages of 6 and 11 years should get…

A: Population mean, μ=10 Sample size, n=59 Sample men, x¯=9.2 Sample standard deviation, s=2.8 Level of…

Q: The technical support department at a technology company sampled 100,000 calls and reported that the…

A: Sample size n =100000 Sample mean=5.5 Population standard deviation =1.45

Q: Write Two Quantitative Paragraphs about Statistics!

A: Statistics is a field which involves collection, arrangement and analysis of the data to draw…

Q: Find the margin of error for the given values of c,o and n C = 0.95, o = 652 and n= 45 Round to two…

A: Answer: From the given data, Sample size(n) = 45 Standard deviation(σ) = 652 significance level (α)…

Q: A student takes an exam containing 3 true or false questions. If a student randomly guesses on the…

A: From the provided information, A student takes an exam containing 3 true or false questions that is…

Q: Consider the relationship between the number of bids an item on eBay received and the item's selling…

A: X: 20,26,32,35,38 Y:12,13,14,15,16

Q: A city council is trying to determine if library B, with extended hours, has a higher proportion of…

A: The given results shows one proportion z test.

Q: Where is the solution for part d?

A: The contingency table below summarizes a survey of 1,000 bottled beverage consumers

Q: 2. A history teacher records the SAT scores of all 87 of her students. We use these data to…

A: Sample size n=87 The SAT scores of all 87 students are recorded. This data is used to construct a…

Q: Find the mean and standard deviation for the binomial distribution P=0.26 and n=12

A:

Q: Jump to level 1 A rods manufacturer makes rods with a length that is supposed to be 17 inches. A…

A: n=24, sample mean X̄=17.09,  standard deviations s=0.25

Q: A bank received on average 10 bad cheques per day, What is the probability that the bank will…

A: λ = 10 bad cheques per dayx = no. of bad cheques per dayP(x=X) = e-λ(λ)xx! _____poisson…

Q: Please help me to interpret the following Tukey-Kramer results.  My interpretation is that the only…

A: Tukey HSD is a post hoc test which is conducted when the ANOVA is significant.

Q: 5. Suppose we run the regression Yi = Bo + B₁x₂ + Ui and get an estimate 3₁. The 95% confidence…

A: Suppose we run the regression           yi=β0+β1xi+ui and get an estimate β^1. The 95% confidence…

Q: In the 2004 baseball season, Ichiro Suzuki of the Seattle Mariners set the record for the most hits…

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

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A: Null vs Alternative Hypothesis Definition & connotations How do they differ  How do you state…

Q: ople or more 18. The lifetime of a flashlight battery is normally distributed with a mean = 35.6 hr…

A: The lifetime of a flashlight battery is normally distributed with a mean = 35.6 hr with standard…