se the z-score formula, z=x−μ/σ, and the information below to find the mean, μ. Round your answer to one decimal place, if necessary. z=3.25, x=22.1, and σ=2.4

Q: Find the value of 0.010 for a /-distribution with 45 degrees of freedom. Round your answer to three…

A: given  data, df=45t0.010=?here we can see that α=0.010df=45critical value of t - score =?

Q: The following data lists the ages of a random selection of actresses when they won an award in the…

A: The data shows the ages of the Actress and Actor when they won an award.

Q: You are testing the claim that smiling, rather than remaining neutral, during a court proceding will…

A: Given n1=n2=34 Alpha=0.05

Q: 2. Problem. Let X be a random variable such that E(X)= 0. Assuming that the variance of X exists,…

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Q: A random sample of 130 observations produced a mean of x¯¯¯=21.9x¯=21.9 from a population with a…

A: Givensample size(n)=130Mean(x)=21.9standard deviation(σ)=3.3

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A: Regression are used to predict the values based on the another. It has two variables, they are…

Q: A graduate teaching assistant for an Introduction to Statistics course collected data from one of…

A: The data shows the study time and GPA.

Q: b. Now suppose the sample consists of 30 boys instead of 15 and repeat the test. Find the test…

A: Here mean is 36.2 and standard deviation is 3. Population mean is 37 sample number is 30 instead of…

Q: According to the National Health Interview Survey, 2007,       Avg height for men = 69.93 inches…

A: The average weight for men is 192.78 lbs.

Q: The mean amount of time it takes a kidney stone to pass is 14 days and the standard deviation is 4…

A: The mean is 14 and the standard deviation is 4.

Q: Example 3 Ten cards numbered 1 to 10 are placed in a box, mixed up thoroughly and then one card is…

A: GivenA box contains cards numbered 1-10=10

Q: Private nonprofit four-year colleges charge, on average, $27,449 per year in tuition and fees. The…

A: given data  μ = 27449σ = 7255 normal distribution

Q: Find the T value such that the area in the right tail is .15 with 8° of freedom

A: Given that Significance level (α)= 0.15 Degree of freedom (df) = 8 Type of tail = right tailed

Q: The time to complete an exam is approximately Normal with a mean of 45 minutes and a standard…

A: Given data, Normal distribution Mean =45 Standard deviation =4

Q: a. What is the point estimate of the population mean? 3.38 b. Find the standard error of the sample…

A: The sample mean is 3.38.

Q: The histogram below shows the number of hours that students in a statistics class exercise each…

A:

Q: Sally is an undergraduate at CSUN and works as a "hair removal technician" at Touch of Class beauty…

A: The sample size is 9, sample mean is 14, population mean is 10 and population standard deviation is…

Q: Q. 27 What is meant by an admissible test procedure?

A: In Statistics, Admissibility indicates that a test can not be improved uniformly in parameter space.

Q: Define most powerful test.

A:

Q: Calibrating a scale: Making sure that the scales used by businesses in the United States are…

A: The information provided in the question are as follows : Population mean (µ) = 1000  Population…

Q: Give conditional variance.

A:

Q: Since non-probability sampling is faster, cheaper, and easier then probability sampling it should be…

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Q: Compute the z-test statistic. Z= (Round to two decimal places as needed.) ompute then yolu

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Q: Q. 14 Distinguish between non-randomised and randomised test.

A:

Q: . Create    a    scatter    plot    of    the    data b. Calculate    r    and    r2 c. Report…

A: From the above data  We are given that  X independent variable is Time  Y dependent variable is…

Q: he Athletics Department at a high school is interested in the difference in the run times between…

A: The given confidence interval is (-1,8, 2.9).

Q: Discuss quartiles and their importance.

A:

Q: Suppose that 44% of all adults think that airline travel is safer than driving. An opinion poll…

A: The information provided in the question are as follows : Sample distribution of sample proportion…

Q: he following 1 2 d15 19 information: 3 4 27 30 5 37 6 58 ng the two-month weighted moving average…

A: Given, Month Demand  (At) 1 15 2 19 3 27 4 30 5 37 6 58

Q: The data table contains waiting times of customers at a bank, where customers enter a single waiting…

A: The data shows the waiting times of customers at a bank.

Q: Consider the following information about Stocks I and II: State of Economy Recession Normal…

A:

Q: ← Suppose that E and F are two events and that N(E and F) = 200 and N(E) = 510. What is P(FIE)?…

A: From given data we have ; N(E and F)=200 N(E)=510

Q: Choose a student at random from all who took the large accelerated introductory statistics at Hudson…

A: From the provided information, The probability distribution table is given as: Grade A B C D or F…

Q: If a data set produces SSR = 300 and SSE = 200, then the coefficient of determination is

A: SSR = 300 SSE = 200 coefficient of determination(R2) = ? SST = SSE+SSR = 200+300 = 500

Q: Discuss quartiles and their importance.

A: We need to discuss about Quartiles and its importance.

Q: The highway department is testing two types of reflecting paint for concrete bridge end pillars. The…

A: There are two independent samples which are orange paint and yellow paint. We have to test whether…

Q: A study asked respondents, "If ever married, how old were you when you first married?" The results…

A: We have given that,   (N) = 26750, mean = 23.960, standard deviation = 4.864 and standard error of…

Q: In a certain​ survey, 514 people chose to respond to this​ question: "Should passwords be replaced…

A: In hypothesis testing, when the test of population proportion is conducted, we often use normal…

Q: Limpopo company has recorded quarterly maize sales and seasonal ratios from 2015 to 2017 financial…

A:

Q: Define null and alternative hypothesis.

A:

Q: requirements. What is the probability that a student selected at random from this school earn…

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Q: What proportion of pizza restaurants that are primarily for walk-in business have a salad bar?…

A: It is given that  Favourable cases, X = 997 Sample size, n = 1250

Q: Which of the following is true of density curves? A legitimate density curve must follow the…

A: Method; the total probability of any distribution must be equal to 1.

Q: Test Engineers found that 22% of steel frames fracture within 15 years. The average stress that…

A: It is given that the average stress that the frames an withstand is 30 psi.

Q: Let Xn, Yn be independent simple random walks. Let Zn be (Xn, Yn) truncated to lie in the region Xn…

A:

Q: Weight = 100+10.9. Training. Calculate the residual of someone who trains 10 hours each week and can…

A: It is given that  The regression equation is given by Weight = 100 + 10.9 Training

Q: An electronics manufacturing process has historically had a mean completion time of 65 minutes. It…

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

Q: what are the corresponding standard deviation using each of these pairs? What would you infer from…

A: The measurement units of the standard deviation should be in the same measurement scale of the image…

Q: A survey asks respondents to rate their political views on a seven-point scale, where 1 = extremely…

A: Sample size (n) = 1041Sample mean (x̅) = 4.68Standard deviations (s) = 1.12Significance level (α) =…

Q: For each data set, find the measures of central tendency (mean, median, and mode), measures of…

A: Solution-: Given data sets: Data set 1: 18, 15, 21, 16, 15, 14, 15, 21 Data set 2: 22, 35, 28, 29,…