Create a scatter plot for the following. 15 17 40 40 X у 19 38 O positive correlation O negative correlation 20 35 20 31 21 32 If there is correlation in the population would it positive or negative correlation? 222 28 22 25 23 25

Q: The National Center for Education Statistics would like to test the hypothesis that the proportion…

A: GivenThe national center for education statistics would like to test the hypothesisthat the…

Q: What is the value of Σ(X2 + 2) for the following scores? Scores: 9, 10, 8, 6, 5, 9, 6, 5 a. 450…

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Q: What would be your decision?

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Q: Use the following sample to estimate a population mean . 56 79.3 86 85.8 80.5 79.9 81.5 81.1 81 96.4…

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Q: Determine the P-value for a one sided test with t = 2.52 and n=21 O a. 0.0075 O b. 0.0175 OC. 0.01 O…

A: We have given that t = 2.52 n = 21

Q: (Marginal normality does not imply bivariate normality.) Let X and Y be indepen- dent n(0, 1) random…

A: Normal distribution The normal distribution is the term for a probability bell curve. In an…

Q: Let X and Y be independent random variables with means ux, μy and variances o, oy. Find an…

A: Given:  Random variable x and y are independent with means ux, uy  , varience σ2(x) and σ2(y)  E(x)=…

Q: A poll asked whether states should be allowed to conduct random drug tests on elected officials. Of…

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Q: Question 2 The Z-scores of an accepted range of Pizza Pockets is between -1.10 and 0.51. If there…

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Q: Solve the problem. A researcher wants to use a paired sample to determine whether the mean number of…

A: In the given problem we need to test whether there is difference between the mean number of hours…

Q: A certain river floods every year. Suppose that the low-water mark is set at 1 and the high-water…

A: The Given certain river floods every year. The Given Distribution function is FYy=PY≤y=1≤y<∞

Q: Find lim X-13 2 12-x-25 x+13

A: limx→-1312-x2-25x+13 evaluate the limits of numerator and denominator. 12-(-13)2-25-13+13=00 since…

Q: A study was conducted using 60 mobile network users, who volunteered to participate in the research…

A: Given that,  For Mobile network A, mean is x̄A= 8.2  Standard deviation is, sA= 5.9 For Mobile…

Q: The Toylot company makes an electric train with a motor that it claims will draw an average of only…

A: Given: Mean, x̅ = 1.40  Sample standard deviation, s = 0.43 Sample size, n= 9 Level of significance,…

Q: a sample of 150 people from town A, 45% planned to vote for the proposition.  In a sample of 200…

A: According to the given information in this question We need to apply two proportion z test then…

Q: The probability distribution for the number of sales done by a new Number of Sales per day x Number…

A: The probability distribution given in the question is as follows: X P(x) 0 0.16 1 0.19 2…

Q: (b) Compute 95% confidence interval for o. Note: 20.025 = 1.96.

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Q: A sample of n = 10 has s = 3. What are the correct values for S.S. and s2?

A: It is given that Sample size n = 10 Sample SD s = 3

Q: Probabilty of P(Z ≤ 1.76)

A: GivenP(z≤1.76)

Q: Professor Jennings claims that only 35% of the students at Flora College work while attending…

A: Given: Sample size,n= 76 Number of students who have jobs,x= 35  Level of significance=0.05

Q: For a normal distribution with a mean of μ = 10 and a standard deviation of σ = 2, what is p(5<X<15)

A: It is given that X follows N(mean = 10, SD = 2), then Z = (X - mean)/SD follows N(0,1)

Q: Perform an appropriate statistical test using the dataset (Sheet name: Cholesterol) if a researcher…

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Q: The monthly earnings of a group of business students are normally distributed with a standard…

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Q: A marketing company has randomly surveyed 190 men who watch professional sports. The men were…

A: Sports preference college degree not having college degree total NBA 38 51 89 NFL 11 90 101…

Q: A gambler has a probability of 0.4 of picking a winning team. What id the probability that the…

A: Given  W=Win, L =loss P(win)=P(W)=0.4  P(LLLW)=?

Q: Using the time series data in the table, respond to the following items.   Period Sales 1 $ 1,001…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: Suppose the household incomes for Kamloops are normally distributed with mean $62,000 and standard…

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Q: What is the computed p-value for the given data on the "BMI" before ("Pre") and after ("Post") the…

A: We will use paired samples t test for the given problem and we will use R software for my…

Q: For the following values of SSX, SSY, and SP, the Pearson correlation coefficient (r) is ______ and…

A: Given: SSX=270 SSY=50 SP=105

Q: Suppose two distributions with the following characteristics are given. Distribution A H=46,400…

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Q: A data set lists earthquake depths. The summary statistics are n= 600​, x= 5.33 ​km, s= 4.28 Km. Use…

A: Given : Sample Size (n) = 600 Sample Mean (X¯) = 5.33 Sample SD (S) = 4.28 Significance Level (α) =…

Q: What is P {Y ≤ <}}? f(x, y) = { (4x + 2y) 3 0, ) 0≤x≤ 1,0 ≤ y ≤ 1 elsewhere

A: fxy(x,y)=4x+2y3,0≤x≤1,0≤y≤10,otherwise we have to find PY≤12

Q: A random sample of 17 hotels in Boston had an average nightly room rate of $165.40 with a sample…

A: It is given that  Sample mean = $165.40 Sample standard deviation = $21.70 Sample size = 17

Q: A food safety guideline is that the mercury in fish should be below 1 part per million​ (ppm).…

A: Confidence interval is the range of parameter. It has the combined value of mean and margin of…

Q: A company that sells tea and coffee claims that drinking two cups of green tea daily has been shown…

A: The Given Company that sell tea and coffee. To question would you ask to find out more about the…

Q: What kind of hypothesis test or analysis should you do?

A: Test is that whether there is a relationship between age and income.

Q: Tanner recently moved into a new neighborhood and was surprised by the large amount of trick or…

A: Hypothesis test are used when there is larger population. It used to take a sample from that…

Q: The breaking strengths of cables produced by a certain company are approximately normally…

A: Given information- We have given that the breaking strengths of cables produced by a certain company…

Q: The paired data below consist of the costs of advertising (in thousands of dollars) and the number…

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Q: A number is called the break-even point if it is equal to the sum of all other numbers under…

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Q: Probabilty of P(Z ≤ 1.0)

A: Required probability is P(Z≤1.0)

Q: A medical school claims that more than 28% of its students plan to go into general practice. It is…

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Q: Test the claim that the proportion of men who own cats is smaller than the proportion of women who…

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Q: 3. A survey of a sample of 637 people is conducted. The survey's respondents are classified…

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Q: 8.92 A survey is planned to determine the mean annual family medical expenses of the 3,000 employees…

A: GivenMargin of error(E)=50confidence level=95%standard deviation(σ)=400

Q: What would be your decision? A. There is insufficient data to make a decision. B. do not reject the…

A: Given: Sample size(n)=25Sample mean(x¯)=244sample standard deviation(s)=24.5population mean(μ)=220

Q: You want to see if violent videos games have any effect on aggression for middle school boys. So,…

A: Hypothesis Testing A procedure for estimating how well someone could anticipate data findings in a…

Q: are vegetarian is 0.078. Find the margin of error for a 99% confidence interval.

A: Here given, A researcher wishes to estimate the proportion of adults in the city of Hawalli who are…

Q: Ann recently switched her primary doctor to one specializing in caring for elderly patients. On her…

A: GivenMean(x)=128standard deviation(s)=25sample size(n)=10sinificance level(α)=0.10

Q: each step. 10, 22, 25, 31, 32, 39 X - x SUM SUM N-1 SUM VN-1 (X - x)²

A: Mean is the average value. When this value is substracted from each of the values and then that…