A statistical research yields to the sample proportion of a certain feature in a certain community be 0.56. Find the required sample size for a maximum margin of error of 0.05 for a 90% confidence interval. O a. 211 O b. 266 O c. 276 O d. 267

Q: Determine whether the following graph can represent a variable with a normal distribution. Explain…

A: Given:

Q: you want to learn which variables affect aggression. You want to answer three basic questions: Does…

A:

Q: The weights for 10 adults are 72, 78, 76, 86, 77, 77, 80, 77, 82, 80 kilograms. Determine the…

A:

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: Use regression to find a quadratic model for the given data. (Round the terms to four decimal…

A: The given data is: y x -5.6 0.6 7.7 0.7 20.2 2.6 18.9 4.7 1.3 5.3

Q: Find the mean, variance and standard deviation for the probability distribution given below: X…

A: Given X -5 2 12 10 P(X) 0.553 0.136 0.213 0.098

Q: The following data show the number of hours spent watching television for 10 randomly selected…

A:

Q: Determine whether the following graph can represent a variable with a normal distribution. Explain…

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

Q: (a) What is the probability that a single student randomly chosen from all those taking the test…

A: Z table has used to find the probability.

Q: what is the chi-square test and how is it used?

A: Chi square test: A chi-square test is a statistical test used to evaluate found effects with…

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: using excel spreadsheet , find the linear least squares regression equation let x=time in years…

A: Step-by-step procedure to find the regression line using Excel: In Excel sheet, enter X and Y in…

Q: What is the type of relationship between x and y? A. No relationship B. direct relationship C.…

A: Given that    X Y X \cdot YX⋅Y X^2X2 Y^2Y2   1.3 1.6 2.08 1.69 2.56   -1.2 -2.1 2.52 1.44…

Q: (a) What is the probability that the average weight of a bar in a Simple Random Sample (SRS) with 3…

A: Given,sample size(n)=3mean(μ)=8.2standard deviation(σ)=0.2

Q: dent requires more than 56 minutes to complete the quiz. = dent completes the quiz in a time between…

A: Given amount of time it takes for a student to complete a statistics quiz is uniformly distributed…

Q: TRUE OR FALSE. a.) Let X (X₁, X2,..., Xn)' be a random vector with joint cumulative distribution…

A:

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: The average oxygen uptake of healthy women is assumed to be forty. Thirty woman in a mountain city…

A:

Q: During the class, it was pointed that regression and correlation (betwee the following statements is…

A: During the class regression and correlation related to each other.

Q: Determine the P-value for a two-sided test with t = 2.85 and n=9 O a. 0.015 O b. 0.01 O C. 0.035 O…

A:

Q: 3 Of 266 employees selected randomly from one company, 13.53% of them commute by carpooling. Find…

A: As per our guidelines we are suppose to answer only one question.…

Q: An advertising agency would like to create an advertisement for a fastfood restaurant claiming that…

A: Followings are the  answer of the question Option :- Ho: μ≥5    vs   Ha: μ<5 Population…

Q: design. A web developer has decided to use a new technique accounts into 10 categories and kept…

A: Given: sample size(n)=10

Q: According to government data, the probability that an adult was never in a museum is 15%. In a…

A: Given,n=10p=0.15q=0.85A random variable X~Binomial(n=10 , p=0.15)P(X=x)=Cx100.15x0.8510-x    ;…

Q: The following table shows the approximate amount of trash produced in an industrialized country from…

A: Given: n = 3 Formula Used: The equation of regression line is: Y = a + bX b = n∑XY-∑X∑Yn∑X2-∑X2 a =…

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: Use the following cell phone airport data speeds (Mbps) from a particular network. Find P 30- 0.1…

A:

Q: Construct a 98% confidence interval to estimate the population mean with x = 61 and o=13 for the…

A:

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

A:

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

A: Given that  Margin of error =E =125 Population standard deviation =478

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: The average oxygen uptake of healthy women is assumed to be forty. Thirty woman in a mountain city…

A: From the given information, The testing is based on the mean. Here, the sample size is 30, the…

Q: Boys and girls: The National Health Statistics Reports reported that a sample of 320 one-year-old…

A:

Q: Find the z-score having area 0.86 to its right under the standard normal curve; that is, find Zo.-…

A: The z score is used to measure the number of standard deviations from the mean. It is calculated by…

Q: 1. The quotient of any two chi-square distributed random variables divided by their respective…

A: Note: According to Bartleby guidelines expert solve only one question and rest can be reposted.

Q: A population has a mean μ = 83 and a standard deviation = 29. Find the mean and standard deviation…

A: Given that  Population has mean 83 and standard deviation 29. Population mean (μ) = 83 Standard…

Q: the given data to do the llowing. ind the regression equation for the data points. Sraph the…

A: Data is as follows x y 2 1 5 6 4 3 1 -2 3 1

Q: a. The standard error of the mean is (Round to two decimal places as needed.) b. The probability…

A: It is given that  Mean, μ = 1850 Standard deviation, σ = 510 Sample size, n = 30 Z-Score, Z = ( M -…

Q: Expedia would like to test the hypothesis that the proportion of United Airline flights that arrive…

A: It is given that Sample size n = 110 Number of flights arrived at time, X = 82 Level of significance…

Q: In a class of 10 students there are 4 boys and 6 girls. If a committee of 3 students is selected…

A:

Q: The computed test statistic for the appropriate test is

A: A mathematics professor wants to determine whether there is a difference in the final averages…

Q: 4. A fire detection device uses 3 temperature-sensitive cells acting independently of each other in…

A: Here given, A fire detection device uses 3 temperature-sensitive cells acting independently of…

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: In a study of the accuracy of fast food drive-through orders, one restaurant had 38 orders that were…

A: The value of n is 325 and x is 38.

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

A:

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

A:

Q: The body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of…

A:

Q: Assume the random variable X is normally distributed with a mean of μ=62 and a standard deviation of…

A: Given that.   X~N( μ , ?^2 )   μ=62     , ?=8     Z-score =( x - μ )/?

Q: The test scores for the analytical writing section of a particular standardized test can be…

A: Here, μ=3.7 and σ=0.89.

Q: If the sum of the squares of five numbers is 165 and their variance is 8. What is the mean of the…

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…