From past records a firm has noted that the average time its employees take for tea break is 15 minutes , with variance 4 minutes. A new employee joins the firm and over 50 tea breaks he has been observed to take an average time of 17 minutes. Should the manager caution him about taking too long a time over his tea break

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Q: The two types of variance that can occur in our data are A. Independent and dependent

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Q: To obtain a maximum amount of variance, an item ought to have a degree of difficulty of what?

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Q: For a Bernoulli process with success rate .4, what is the variance in the number of trials we need…

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A: Introduction: Consider that x is the independent variable and y is the dependent variable. The size…

Q: The weight distribution of 100 NSU students is normally distribution with mean 70 kg and variance 2…

A: Given that mean is 70 kg and variance is 2 kg. That is,  μ=70σ2=2 i) Consider,…

Q: In 2014, the variance of the scores in the National Achievement Test for science was 9.61. A sample…

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Q: Assume the variance of IBM is .16 and the variance of Microsoft is .25. If the variance of an…

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Q: When we use a least-squares line to predict y values for  x values beyond the range of x values…

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A: A normal distribution follows a bell shaped curve which is centred at the mean and it is also called…

Q: A one-way analysis of variances produces dftotal = 39 and dfwithin = 36. For this analysis, what is…

A: A one-way analysis of variances produces dftotal = 39 and dfwithin = 36. For this analysis, what is…

Q: A new material is being tested for use in the manufacture of electrical conduit, to determine…

A: Here, the crushing strengths are measured for a sample of size 16 of the old material and a sample…

Q: 6. If the variance of grades in an Economics course is 25, each student should unconditionally…

A: Given that: The variance of grades in an Economics course is 25.

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A: The given data is, Plant A Plant B 12.9 13.3 14.2 13.7 13.7 13.4 13.2 13.5 13.8 12.6…

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A: Response variable: The variable that is changed because of the influence of the explanatory variable…

Q: The time it takes to bake a Blueberry Muffin is normally distributed with a mean of 45 minutes and a…

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Q: 3) What is a probability of selecting a customer whose expenditure is differ than the population…

A: Given :    Mean μ =400standard deviation (σ) =900 3) To find probability of selecting a customer…

Q: The accounting department analyzes the variance of the weekly unit costs reported by two production…

A: See the handwritten solution

Q: The probability that the average time of the sample does not exceed 168 minutes. b) The probability…

A: Given that  μ= 165 , σ2=144 ) μ= 165 , σ=√144=12  n=210 Formula for Z-score Z=(X-μ)/σ

Q: The blood pressure and weight of Jellystone Park bears are correlated with and .6 is the correlation…

A: The provided information is: Average blood pressureY¯=150 A variance of blood pressureσ2y¯=100 The…

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Q: A sample of round trip flight prices from 14 major U.S. cities to Atlanta and Salt Lake City are…

A: As the standard deviation of the population is known for two distributions a z test would be…

Q: The accounting department analyzes the variance of the weekly unit costs reported by two production…

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Q: Last year the average cost of making a movie was $54.8million.This year a random sample of 15 recent…

A: Given that, Sample size n=15 Sample mean production cost x¯=62.3 Sample variance s2=90.25 Sample…

Q: filling line. The machine that dispenses salad dressings is working properly when 8 ounces are…

A: Here one sample t test is applicable

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A: Solution: From the given information, r=0.20.

Q: The machine that dispenses salad dressings is working properly when 8 ounces are dispensed. Suppose…

A: Given, Suppose that the average amount dispensed in a particular sample of 35 bottles is 7.91 ounces…

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A: Suppose X and Y are two variables which are negatively correlated. Correlation (X,Y)<0

Q: If the variance of all newly-born babies are 1.25 pounds, can we say that newly-born baby boys are…

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Q: Katrina Bell, analyst for the Hexaco Oil Company, has been assigned the task of investigating the…

A: Given: n = 11 Significance level α = 0.01 Formula Used: It is given that paired test used t = d-μdSn

Q: ition, you discover that the prices of imports and exports have a correlation of r = -0.40. The…

A: *answer:

Q: A snow shovel manufacturer is considering a new shovel with small holes punched in it, thought to…

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Q: Mr Chimbukutu, owner of a bakery said that the average weekly production level  of his company was…

A: We have given that  Mean(µ) = 11398 Standard deviations (σ) = √ 49729 = 223

Q: Suppose that a journal article reports that the mean age at marriage of Filipino women is 22.6 years…

A: Given Data : For Sample 1 x̄1 = 22.6 σ1 = √7.2 = 2.6833 n1 = 150 For…

Q: Which of these experimental designs has the most statistical power (is more likely to show a true…

A: A) Between Subjects  has more statistical power than the rest

Q: To compare the effectiveness of two kinds of bumper guards, two independent random samples of six…

A: n1=6, x¯1=1440, σ12=3632n2=6, x¯2=1490, σ22=2020α=0.05

Q: The management of a supermarket wants to adopt a new promotional policy of giving free gift to every…

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

Q: collusion, this variance was 16.08. Assume that the data can be regarded as an independent random…

A: Given data : For sample 1 n1 = 4 s1²= 114.09 For sample 2 n2 = 7…

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Q: A certain producer of chocolate has some problems with the variability of five suppliers of cocoa.…

A: Given information: k=5Minimum detectable effect=3.5 unitsσ2=2.5 unitsα=0.05

Q: Within the MedTech Department, students were randomly assigned to one of two Biostatistics teachers…

A: Given that, n1 = 30 n2 = 25 x¯1=82.5x¯2=83.9 s12=80s22=125