the population standard deviation is 15, how large a sample is necessary to have a standard error that is greater than 8 points?

Q: propriate technology to answer this question. e following estimated regression equation based on 10…

A:

Q: During the nutrition research, the amount of consumed kilocalories per day was measured for 18…

A: Given that  For women  Observation: XX X^2X2 1 2026 4104676 2 1600 2560000 3 1700 2890000…

Q: Suppose Diane and Jack are each attempting to use a simulation to describe the sampling distribution…

A: From the provided information, Mean (µ) = 50 Standard deviation (σ) = 5 X~N (50, 5)

Q: You wish to determine if there is a positive linear correlation between the two variables at a…

A: In this case, x is the independent variable, and y is the dependent variable.

Q: A random sample is drawn from a population of known standard deviation 11.3. Construct a 90%…

A:

Q: During the spring of 1999, many fuel storage facilities in Serbia were destroyed by bombing. As a…

A: Given that  Sample sizes n1=8      , n2=7      Sample means X̄1=10.7     , X̄2= 33.8   s1 = 3.3…

Q: The minimum wage earners of the National Capital Region are believed to be receiving les: than Php…

A: Hypothesis testing is vital to inferential statistics.

Q: What is the area within 1 standard deviation from the mean of a normal curve? a. 95.44% b. 62.86% c.…

A: here given,  use standard normal distribution  area under the curve represented by probability

Q: For a population with a mean equal to 150and a standard deviation equal to 25​, calculate the…

A: The random variable X follows normal distribution. We have to find the standard error of the mean…

Q: As Senior Class President, one of your lifelong duties is overseeing the planning of your high…

A:

Q: The Alpha bank is long in 15 year zero-coupon bond priced at $2 million. The current annual yield on…

A:

Q: 4. For a linear combination of n random variables, find its expectation and variance.

A:

Q: Run a regression analysis on the following bivariate set of data with y as the response variable. x…

A: In this case, x is the independent variable, and y is the dependent variable.

Q: Learner Height (in meter) Consider the heights of 5 learners. Suppose you are interested in…

A:

Q: Mean = Variance = Standard Deviation 7. Sketch the second bell curve by showing the mean and…

A: Since you have asked multiple questions with multiple datasets. we will solve these questions for…

Q: Jin conducted a probability experiment in rolling a dice 10 times. He tallied the outcome base on a…

A: Note: Although it has been mentioned that Jin rolled the dice 10 times, but the total frequency of…

Q: A sales manager wants to forecast monthly sales for the company's products using the following…

A: A company manager intended to forecast the monthly sales and six months sales are given as below:…

Q: [S1] Yn = Yn-2 +0.5Y,-12 + 0.25Yn-14 + En – 0.25€,-12, S2 Yn = Yn-2 + 0.5Yn–12 – 0.25Y,-13 + En…

A: Given three timeseries models as S1   Yn=Yn-2+0.5Yn-12+0.25Yn-14+εn-0.25εn-12 S2…

Q: Reading proficiency: An educator wants to construct a 99.8% confidence interval for the proportion…

A: The random variable X follows normal distribution. We have to find the sample size. This is z-test…

Q: A CBD ol-based pain reliet candy bar manutacturer is interested in estimating how sales (in number…

A: The independent variable is Price. The dependent variable is Sales. We have to test whether sales…

Q: A major oil company has developed a new gasoline additive that is supposed to increase mileage. To…

A:

Q: Illustration 10,39. Suppose that a prospective buyer tests bursting pressure of samples of polythene…

A:

Q: Illustration 10.18. In a co-educational college boys and girls formed separate groups on the…

A:

Q: The average production cost for major movies is 58 million dollars and the standard deviation is 20…

A:

Q: The mean cost of a new Sport Utility Vehicle (SUV) has been found to be $42,500 with a standard…

A: Given that  X~Normal(μ=42500  , σ = 2500) Formula for Z-score    Z-score=(X-μ)/σ

Q: Run a regression analysis on the following bivariate set of data with y as the response variable. x…

A: The independent variable is x. The dependent variable is y. We have to predict the explanatory…

Q: Illustration 10.42. From the data given below about four sub- groups, calculate the average and the…

A:

Q: (b) Use the table from part (a) to find u- (the mean of the sampling distribution of the sample…

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

Q: The speed limit on Interstate 81 in Susquehanna County is 70 miles per hour (mph). On a clear day…

A: Solution-: Given: μ=77.9mph,σ=8.2mph We find, P(a randomly selected car is going over 85 mph)=?

Q: . P(z ≥ -.98) 2. P(z ≤ 1.84) 3. P(z ≥ 2.15)

A: Let Z be the random variable from normal distribution then we will find the following probabilities,…

Q: Find the sample size necessary for an 80% confidence level with a maximal margin of error E= 0.07…

A: Given that s.d =0.34,alpha =0.2,E =0.07 ( e) n= ?

Q: The mean number of hours 49 employees at a certain company worked over the weekend was 6.3. The…

A: GivenMean(x)=6.3standard deviation(σ)=2.5sample size(n)=49α=0.07

Q: what is the sample size if the standard deviation is 8 and margin error is 3 at 99%

A: We have given that,  Standard deviation (σ) =8, margin of error (E)= 3 and confidence level (C.I) =…

Q: A study was conducted to determine the differences in the average weight loss of four groups of…

A: Given   A study data conducted to determine the differences in the average weight loss of four…

Q: The tensile strength of paper can be modelled by a normal distribution with a mean of 240kPa and…

A: Mean(µ) = 240Standard deviations (σ) = 15X ~ N (µ, σ )= N(15, 240)

Q: *5.42 The number of defects per yard Y for a certain fabric is known to have a Poisson distribution…

A: Give Poisson distribution with parameter λ f(λ)=e-λ     λ≥00       elsewhere Find The unconditional…

Q: 2. The following is a table relating a group of 1000 patients' true breast cancer statuses and their…

A: Fro the given table Find the probabilities

Q: offer an insurance policy to these two customers and offer it for the same price, what price should…

A: Here given., Suppose Janice has a 25% chance of totaling her car (worth $13,500) this year and Sam…

Q: 13. Systematic random sampling is used to interview 10% of the students at a local school with 1950…

A:

Q: y 0.20, α = 0.05 (two-sided), and n = 25.

A:

Q: What do you think is the reason why history changes

A: Historical change refers to how events change over time. Explore history as a science, discover the…

Q: You are an econometrician working in the Ministry of Finance in Trinidad and Tobago and using a…

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

Q: The manager of a certain bank has recorded the amount of time, recorded to the nearest tenth of a…

A: R code:   Output:

Q: Annual high temperatures in a certain location have been tracked for several years. Let X represent…

A: X Y X.Y X2 1 40.2 40.2 1 2 38.55 77.1 4 3 37.2 111.6 9 4 34.45 137.8 16 5 33.1 165.5…

Q: For an M/M/1 queue with load p, prove that : E[NQ] = and Var(N): (1 – p)²

A:

Q: In randomized, double-blind clinical trials of a new vaccine, rats were randomly divided into two…

A:

Q: Using the information in the image draw : 1. A histogram (using equal class widths) 2. A frequency…

A: Given that  Group of temperatures  Frequency  Cumulative Frequency  Class boundaries  22-24 8 8…

Q: Fifteen adult males between the ages of 35 and 50 participated in a study to evaluate the effect of…

A: Given: Sr. No. Before After 1 265 229 2 240 231 3 258 224 4 295 240 5 251 238 6 245…

Q: In a June 2021 survey by Insider, “52% Americans want all student-loan borrowers to  have their debt…

A: The random variable Americans that want  all student loan borrowers to have their debt forgiven…

Q: If you're estimating the bias of a coin that came up heads 10 times and tails 20 times, what is the…

A: Hello thank you for the question. According to our honor code can answer one question at a time.…