Find the margin of error for a poll, assuming that 95% confidence level and π = 0.3. n = 1,800 (Round your answer to 4 decimal places.)

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A: The standard deviation of X is 4 and standard deviation of Y is 8.

Q: Use the hourly rates on the right (rounded to the nearest whole dollar) 35 support employees in a…

A: given data,here we have to find out the frequency distribution and find out the grop mean also here…

Q: Assume that a randomly selected subject is given a bone density test. Those test scores are normally…

A: Required probability is P(Z>-1.69)

Q: When the null hypothesis is rejected, then:    A. F>F(α,n-k,k-1)  B. F>F(α,k-1,n-k)  C. F = 0  D.…

A: We will find the rejection region in ANOVA table.

Q: Stocks A, B, and C have expected returns of 12 percent, 12 percent, and 10 percent, respectively,…

A: From the provided information, μ1=12μ2=12μ3=10σ1=39σ2=30σ3=30

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A: Since you have posted a question with multiple sub-parts, we will solve first 3 sub-parts for you.…

Q: The data set provides measurements of 5 different samples.  Answer the following questions if you…

A: From the given data set we find the value of X bar for every sample:  X bar=ΣXi/k  Range of Sample…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 98.6 and a standard…

A: GIVEN DATA, NORMAL DISTRIBUTION μ=98.6σ=24.2 WE HAVE TO FIND OUT THE PROBABILITY THAT THE   IQ…

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A: GIVEN DATA normal distributionμ = 79.3σ = 7.9

Q: b. What is the proportion of months in which demand is completely satisfied? c. Use the simulation…

A: Galaxy co. procures router at the rate of $150 and Sale the same at $300. The net profit for one…

Q: Suppose that 300 out of a random sample of 375 letters mailed in the United States were delivered…

A: It is given that  Favourable cases, X = 300 Sample size, n = 375 Sample proportion, p^ = X/n =…

Q: 2. The height of a bamboo shoot is measured at noon every day. The results for the first week are…

A:

Q: How to solve the following? Suppose the time a child spends waiting at for the bus as a school bus…

A: Given that  X~Exp(λ) Average =1/λ λ=1/7

Q: The accompanying data set includes volumes (ounces) of a sample of cans of regular Coke. The summary…

A: From the provided information, Sample size (n) = 36 Sample mean (x̄) = 12.193 Sample standard…

Q: Three molecules of type A, three of type B, three of type C, and three of type D are to be linked…

A:

Q: Indicate the scale of measurement of the following variables:   iv. Marital status v. Weight (in…

A: Scale of measurements: Nominal : name(categories) Ordinal :  ordered categories (name + ranking)…

Q: The efficiency for a steel specimen immersed in a phosphating tank is the weight of the phosphate…

A: a) we need to find regression equation for the given data. Given X is the Temperature and Y-…

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A: Data given n=5,  3.1,3.3,4.5,2.8,3.5  Construct 95% CI for population mean μ

Q: Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and…

A: Here, P-value given in graph  P-value= 0.9505 Significance level is not mentioned, So Alpha = 0.05

Q: A random sample of 40 Northern California households yields an average size of 3.21  persons with a…

A: Solution: Given information: n=40 Sample size  x= 3.21 Sample mean s=0.61 Sample standard deviation

Q: Suppose the weights of 3-month-old babies are normally distributed-baby boys with a mean of 14.4…

A: Given data,normal distribution,baby boys  μ=14.4σ=1.7baby girls μ=12.7σ=1.7we have to find out the…

Q: 6.A furniture company wanted to see if people in the United States like their new logo. Which choice…

A: Given that  A furniture company wanted to see if people in the United States like their new logo.

Q: Hitting the jackpot in Powerball is not the only way to win a monetary prize. For example, a minimum…

A: Introduction Probability shows how likely an event will occur.

Q: 2 Suppose that Y₁, Y₂, .. Yn denote a random sample of size n from a normal dis- tribution with mean…

A:

Q: An automatic machine inserts mixed vegetables into a plastic bag. Past experience revealed that some…

A: Given n=4 P(underweight)=2.5%

Q: Assume that cans of cola are filled such that the actual amounts have a population mean of μ = 8.00…

A:

Q: Suppose the population mean is known to be 42.8 minutes with a population standard deviation of 14.7…

A: It is given that  Population mean = 42.8 Population standard deviation = 14.7 Sample mean = 44.783…

Q: Suppose the critical region for a certain test of the null hypothesis is of the form F > 9.48773 and…

A: Given Critical region F>9.48773  Fcomputed=1.86

Q: 4. I am still interested in the effect of meditation on anxiety. To test this, I select a sample of…

A: Given: Sample size n = 8 Significance level α = 0.05 Formula used: Test-statistic-t = d-μdsdn

Q: Show that E(X-µ)³ = E(x³) −3 [E (x²) ][E(X)] + 2[E(X)]³

A: The linearity of expectation property: With the assumption that, Xi's (i=1,2,...n) with n positive…

Q: What is the critical value?

A: It is given that the z-test for one population proportion test.

Q: A data set includes data from student evaluations of courses. The summary statistics are n = 85, x=…

A: We have given that, Sample size n=85 Sample mean=3.94 Sample standard deviation=0.63

Q: 61-65 66-70 71-75 76-80 81-85 86-90 Frequency 4 5 12 4 3 2 Cumulative Frequency ? ? ? ? ? Relative…

A: Relative frequency =frequency/total.

Q: 4.52 On a particular test for a very large statistics class, a random sample of n = 4 students has a…

A: Given that  Sample size n =4 Sample mean=75 Sample standard deviation =8

Q: 68% of U.S. adults have very little confidence in newspapers. You randomly select 10 U.S. adults.…

A: Given that  Number of trials n=10  Probability of success p=0.68 X~bin(n,p)

Q: Suppose an insurance company randomly surveyed 633 drivers and found that 601 claimed they always…

A:

Q: A group of 29 statistics students were collecting data for a project in class. One of the variables…

A: 68-95-99.7 rule says  68% data lie within 1 standard deviations 95% data lie within 2 standard…

Q: Given the below probability mass function, find the cumulative distribution function (CDF). NO WORK…

A: x P(x) 4 0.1 6 0.35 13 0.55   we have to find CDF.

Q: Is the average time to complete an obstacle course shorter when a patch is placed over the right eye…

A:

Q: Which statement is incorrect.    A. The F-test is used in ANOVA  B. When ANOVA is used and the null…

A: It is given that the statement about to the ANOVA. Here, need to find out the incorrect statement.

Q: Let’s go to the movies: A random sample of 35 Hollywood movies made in the last 10 years had a mean…

A: From the provided information, Sample size (n) = 35 Sample mean (x̄) = 125.2 Standard deviation (s)…

Q: Let X₁, X2, X3,..., be independent identically distributed Unif(0, 1) random variables. Let Sn be…

A: Hint: Use Chebyshev's inequality for nSn>0.

Q: When using the Central Limit Theorem, what is the "magic number" for sample size that allows you to…

A: the "magic number" for sample size that allows you to use the C.L.T even if the population is not…

Q: To calculate the F statistic    A. The MSE and SST is important  B. The pooled variances is…

A: Given that  MSE = Mean Sum of  Square of Error SST = Sum of Square of Treatment  dfT = Degree of…

Q: A small amount of the trace element selenium, from 50 to 200 micrograms (ug) per day, is considered…

A:

Q: Psychological and educational tests, including MMPI are often designed so they have a mean of 50 and…

A: Given that  They have a mean of 50 and a standard deviation of 10.

Q: Using the generalized multiplication principle, determine how many ways a five-person team can be…

A:

Q: Suppose you have joint random variables X and Y. a) If a problem does not state anything about…

A: a) Given that X and Y are joint random variables. We cannot assume X and Y as independent if there…

Q: Below are four bivariate data sets and their scatter plots. (Note that all of the scatter plots are…

A: Given: There are four figures of the Scatter plot given.

Q: 5. Generally, two types of data may be collected from sampling at an inspection point. These two…

A: Generally, two types of data may be collected from sampling at an inspection point. These two types…