1. The following chart is data over an 8 month period that shows how much a company spent in advertising and the sales revenue for that month   MONTH ADVERTISING $ SALES $ March 900 56000 April 2700 89200 May 3150 98500 June 1300 54000 July 3400 97000 Aug 1500 56000 Sept 2300 93000 Oct 2250 79000   a)What is the correlation coefficient? (round to 2 decimals) describe how you utilized excel to arrive at this number (recommended) or show the formula you utilized to arrive at this answer

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Q: The mean height of women in a country (ages 20-29) is 64.2 inches. A random sample of 50 women in…

A: Given that μ=64.2,σ=2.97,n=50

Q: Suppose a statistics instructor believes that there is no significant difference between the mean…

A: Complete solution and answer is given in the image uploaded below  Thanks!

Q: Which distribution should you use? You are approximating the proportion of the population in…

A: According to the given information in this question We need to identify the correct distribution

Q: O asked 1439 randomly sampled American citizens, "Do you think we can develop a way to protect…

A: Given that  Sample size n =1439 Favorable cases x =766 Sample proportion p^=x/n  =766/1439 =0.5323

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A: The mean is 3.

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Q: If X is normally distributed with a mean of 157 and a standard deviation of 2.45. If you take a…

A: Mean = 157  Standard deviation = 2.45 Sample size = 385

Q: An IQ exam has a mean of 110 and a standard deviation of 12. What percent of people have an IQ score…

A: Given that.   X~N( μ , ?^2 )   μ=110     , ?=12   Z-score =( x - μ )/?

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A: We have given that following are height in inches of 10 boys measured at age 12 and again at age 14…

Q: . The average IQ of male students at State Universities in the U. S. is reported to be 111. A random…

A: Solution is given in the steps below  Thanks!

Q: For several years, evidence had been mounting that folic acid reduces major birth defects. In a…

A: Introduction: Denote p1, p2 as the true proportions of women who gave birth to children with major…

Q: Find the indicated probability using the standard normal distribution. P(Z 1.98) Click here to view…

A: P( Z<-1.98 or z >1.98)=?

Q: Enter the exact answer for the best estimate, and round your answers for the margin of error and the…

A: It is given that  x̅d = 3.1 sd = 2.3 nd = 30

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A: From the provided information,

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A: scores Frequency 70.5-75.5 9 75.5-80.5 7 80.5-85.5 4 85.5-90.5 12 90.5-95.5 19…

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A: The objective is to determine if the graph represents a normal distribution.

Q: Find a 90% confidence interval for the population mean price (per 100 pounds) that farmers in this…

A: Given that  Sample size n =45 Sample mean =6.88 Population standard deviation =2

Q: A bag contains 10 white marbles, 4 blue marbles, 6 red marbles. If one marble is drawn from the bag…

A: Note: As per my policy i can answer only one question. kindly repost the remaining questionsGiven…

Q: Question 6 x is a normally normally distributed variable with mean μ = 21 and standard deviation o =…

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Q: Low-fat or low-carb? Are low-fat diets or low-carb diets more effective for weight loss? A sample of…

A: Given that: 1st Sample(low-carb diet): Sample mean, x¯1=2.9 Sample standard deviation, s1 = 4.46…

Q: Oview page 1 of the table. Click to view page 2 of the table. www

A: Given Using the standard normal z table

Q: = 13 ould you expect to find the middle 50% of most pregnancies? and raw samples of size 45 from…

A: Given Mu=265 Standard deviation= 13

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Q: Use the Student's t-distribution to find the t-value for each of the given scenarios. Round t-values…

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Q: A sample mean is 94, sample size is 27, and population standard deviation is 14 are given. Ho: p=89,…

A: According to the given information in this question We need to find test statistic p value and…

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A: Null hypothesis rejected when p-value≤α   Null hypothesis not rejected when, p-value>α…

Q: (a) For the hierarchical model YA Poisson (A) and A~ gamma(a, 3) find the marginal distribution,…

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Q: The average amount of time it takes for couples to further communicate with each other after their…

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Q: Find the value of the pearson's coefficient r. A. 0.7077 B. -0.7077 C. -0.8054 D. 0.8054

A: Given that  X Y 9 85 2 52 3 55 4 68 2 67 5 86 9 83 10 82

Q: (a) Presented with "Heads or Tails", 118 out of 140 put Heads. Value = i Confidence interval: i…

A: The answers given in the steps below. Thanks!

Q: Your colleague investigates how prices of coffee vary with temperature. He wants to estimate the…

A: If the variable temp is measured in Fahrenheit and the same variable temp is measured in Celsius,…

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A: Given dataμ=61000n=31x¯=58500σ=5700

Q: Why is the Chi- square test applicable to the given scenario?

A: For the given sample data, we will conduct a chi-square test for independence.

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A: Given claim: Determine whether there is a different in the final average just between the past two…

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A: Given data,Mean μ=70sd    σ=9Find the 40th percentile for X

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Q: According to a dietary study, high sodium intake may be related to ulcers, stomach cancer and…

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Q: c) Find the mean and variance of the statistic Y, if i) _Y = 2=1X. ii) Y=1 4X₂² X3 d) if y = X₁² +…

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Q: Students in a large lecture class want to know who has, on average, more Facebook friends, male or…

A: Answer and solution is uploaded below  Thanks!

Q: A hypothesis test is to be performed. Determine the null and alternative hypotheses. The maximum…

A: We need to determine the null and alternative hypothesis for the given problem.

Q: College tuition: A simple random sample of 40 colleges and universities in the United States has a…

A: Sample size (n) = 40Sample mean (x̅) = 19200Standard deviations (s) = 10800Significance level (α) =…

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: Let X and Y have joint density fx,y(x, y) = (6 - x - y) I(0,2)(x) I(2,4) (y). a. Find Var[Y| X = x].…

A: The joint distribution of X and Y is as follows: fX,Y(x,y)=18(6-x-y); 0<x<2, 2<y<4 The…

Q: Use the normal distribution of SAT critical reading scores for which the mean is 507 and the…

A: GivenMean(μ)=507standard deviation(σ)=122

Q: Let Z and X be independent random variables where Z~ N(0, 1) and f(x) = = 1…

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Q: Find the area of the indicated region under the standard normal curve. Click here to view page 1 of…

A: Given graph:   P(-1.3<Z<1.6)=?

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

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Q: Person A scores 78 on an exam that has a mean of 70 and a standard deviation of 5. Person B scores…

A: Given that.   X~N( μ , ?^2 )   Z-score =( x - μ )/?

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)=…