Consider a competitive market where the intersection of the demand and supply curves determine the equilibrium price and quantity of a good. Which of the following statements is true?

Q: if mean is 72 and standard deviation is 8 what is  P( x ≤ 78)

A: Given that.   X~N( μ , ?^2 )   μ=72    , ?=8   Z-score =( x - μ )/?

Q: Travelocity would like to test if the average roundtrip airfare between New York and London is less…

A: Dear student, If you find this solution helpful please upvote ? it.

Q: According to a report done by S & J Power, the mean lifetime of the light bulbs it manufactures is…

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Q: d. What is the probability that the sample mean will be between 250 pounds and 257 pounds? P (250…

A: Given that μ=247.2,σ=35,n=34

Q: Use z scores to compare the given values. Based on sample data, newborn males have weights with a…

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Q: Use the given data to find the equation of the regression line. Examine the scatterplot and identify…

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Q: You want to study whether music affects people’s ability to learn. You have 10 college students…

A: Test is that whether people's ability to learn ks effected by music.

Q: (a) A newborn baby has extremely low birth weight (ELBW) if it weighs less than 1000 grams. A study…

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Q: Using simple moving averages and the following time series data, respond to each of the items.…

A: From the excel calculation table we showed that  the eleventh  forecasted value 121.2 ( 6-period…

Q: me results of a certain medical test are normally distributed with a mean of 127 and a standard…

A: Given data,Mean μ=127sd     σ=12P(X>133)=?

Q: Part (c) Do you reject the null at a 5% level ✓ [Select] Yes No There are 6 parts to this question.…

A: Regression analysis  To test: H0: Coefficient of X=0, i.e. there is no relationship between…

Q: A population is normally distributed with u=300 and a = 20. a. Find the probability that a value…

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Q: In a two-sample significance test for proportions, we test the claim that         [ Select ]…

A: Proportions are tested using z test. It can be used to compare sample and population. It may also…

Q: The average weight of a professional football player in 2009 was 247.2 pounds. Assume the population…

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Q: You determined there was a positive correlation between the number of study hours a week a student…

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Q: Each year advertisers spend billions of dollars purchasing commercial time on network sports…

A: It is given that a recent article listed the top 10 leading spenders ( in millions of dollars ).…

Q: 1. Discuss the theoretical framework of simple random sampling. 2.Discuss the theoretical framework…

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

Q: A computer help line receives on average 32 calls per 8 hour work day. The distribution is Poisson.…

A: Given that  average 32 calls per 8 hour work day.  P( x < 6 )  in an hour =?

Q: Are the years of education of a child dependent on the years of education of their parent? The table…

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Q: (a) Let a be the weight of a juvenile condor. Write the possible unique values for a: (NOTE:…

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Q: The length of fish were measured at 3 different lakes.  Is there evidence to suggest that the…

A: Given data: The length of fish were measured at 3 different lakes.  Lake 1 Lake 2 Lake 3 3.5…

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

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Q: In a small town in Colorado, it was found that 54% of the population support Candidate Randy. In a…

A: For the given data Perform z test for one proportion

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: For an exam with a mean of μ = 84 and a standard deviation of σ = 6, Mary has a score of X = 93,…

A: GivenMean(μ)=84standard deviation(σ)=6

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

A: Given Standard deviations=532 Margin of error=132 At 93% confidence level the z is 1.81

Q: P(A) = 0.3, P(B) = 0.4, and P(A or B) = 0.7, then   a. A and B are mutually exclusive (disjoint)…

A: It is given that  P(A) = 0.3 P(B) = 0.4 P(A or B) = 0.7

Q: A coin-operated drink machine was designed to discharge a mean of 6 fluid ounces of coffee per…

A: For the given data Perform t test for one population mean

Q: gression Function (PRF) and the Sample Regression Function (SRF) using appropriate diagrams and…

A: Population: Complete units or items considered for the study is Population Sample: A part or some…

Q: College Students and Paying Jobs Exercise 2.16 introduces data from a survey that included 5204…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: Using the data below, what percentage of customers bought beer, wine, spirits and snack foods?…

A: It is given that the data into tabulated form in which customers can buy beer, wine, spirits, snack…

Q: Herbie owns a movie theater and has recently started thinking about using subliminal messages to…

A: Test is that whether money spent is effected by showing the subliminal messages.

Q: Give a 99% confidence interval, for μ₁ −μ₂ given the following information. n₁ = 60, x1 = 2.53, $1…

A: Given 99% confidence interval, n1 = 60, x1=2.53 n2 = 50, X2=2.95 S1=0.78,S2=0.94

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

Q: For the following Before/After data, calculate the t-obtained for a Related-Samples t-test. a. 2.53…

A: For using Paired t test 1) sample size of two samples should be equal 2) two samples should be not…

Q: Professor Zuro surveyed a random sample of 420 statistics students. One of the questions was "Will…

A: GivenTotal no. of statistics students(n)=420No.of students said yes for math class(x)=252

Q: The World Data Atlas reports that the average Crude Birth Rate is more or less the same between…

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Q: Consider a drug that is used to help prevent blood clots in certain patients. In clinical​ trials,…

A: For the given data Perform Z test for one proportion

Q: Assuming the population has an approximate no mean = 39 with a sample standard deviation Round the…

A: A sample size n=20 Sample mean=x=39 Sample standard deviation(s)=6 α=0.01

Q: According to insurance records, a car with a certain protection system will be recovered 87% of the…

A: Binomial distribution: The discrete probability distribution of the number of successes in a series…

Q: A statistical research yields to the sample proportion of a certain feature in a certain community…

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Q: Solve the problem. A nutritionist wants to investigate whether her new diet will be effective in…

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Q: In a sample of 47 adults randomly selected from one town, it is found that 9 of them have been…

A: Given: sample n=47 x=9p0=0.08   This is the two tailed test. The null and alternative hypothesis is…

Q: Zappos is an online retailer based in Nevada and employs 1,300 employees. One of their competitors,…

A: It is given that Sample size is n = 22 Sample mean M = 33.9 Sample SD s = 4.1 Levem of significance…

Q: to suggest there is correlation in the population. There is sufficient evidence to suggest there is…

A: X Y 15 40 17 40 19 38 20 35 20 31 21 32 22 28 22 25 23 25

Q: A nutritionist believes that 10% of teenagers eat cereal for breakfast. To investigate this claim,…

A: Suppose that p is the population proportion of teenagers, who eat cereal for breakfast.

Q: A Type I error is the probability of failing to reject a false null hypothesis. Select one: True O…

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

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Q: graph

A: In given graph, four  summaries are given through plot, out of four plots two corresponds to control…