When estimating the population proportion, how large a sample is needed to be 95% confident that the error will not exceed 0.05 ? O 350 O 386 O 384 O 385

Q: About % of the area under the curve of the standard normal distribution is between z=−2.713z=-2.713…

A:

Q: The mean lifetime of 200 mobile phones in a sample is 1,000 hours and their standard deviation  is…

A: The provided information is  n=200 µ=1200 x¯=1000σ=130α=0.01 a.The null and alternative hy[pothesis…

Q: n each​ case, find the approximate sample size required to construct a 95​% confidence interval for…

A: Given, In each​ case, find the approximate sample size required to construct a  95​% confidence…

Q: For the following question, type the solutions to each part of the question in the space provided at…

A: From the given information we conduct Hypothesis test.

Q: For number 13, refer to the graph below: What section performed twice as better as the other…

A:

Q: For the points below find the regression line using least square fit. Please draw the full table as…

A: Given the data as x y 1 11 2 6 3 9 4 49 5 22 6 20 7 30 8 30 9 35 10 39

Q: In a survey of 2961 adults, 1485 say they have started paying bills online in the last year.…

A: Given that  Sample size n =2961 Favorable cases x =1485 Sample proportion p^=x/n  =1485/2961 =0.5015

Q: A title company wants more information about mortgages based on the type of home being bought.  1000…

A: "Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: 4. It is estimated that as of 2015, the total amount of plastic waste generated on Earth was about…

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

Q: Instructions: Read and analyze each problem carefully. Write your complete solution on a short/long…

A: The given data is:

Q: Let X have an exponential distribution with parameter > 0. Find p P[k < X < k +1] = p(1 − p)k . such…

A:

Q: Part 2 of 2 (b) The bottom 2.5% of students must go to summer school. What is the minimum score you…

A: It is given that  Mean = 395 Standard deviation = 96 Z-Score, Z = ( X - μ )/σ

Q: Use Slovin's Formula to compute for the value of n (number of samples) needed if the percentage of…

A: HERE USE SLOVI'S FORMULA AND STRATIFIED SAMPLING METHOD  n = N1 + N e2

Q: The time required for an automotive center to complete an oil change service on an automobile…

A:

Q: What is the most logical order of interpreting statistical results? direction if available, p-value,…

A: First we set the direction like less than or greater than (if available), then calculate pvalue and…

Q: At the lottery’s prize giving there is a meal given to all the staff involved. The pie chart below…

A: Total staff members=50 Percentage of people preferring pizza=14% Percentage of people preferring…

Q: Heart Rates For a certain group of individuals, the average heart rate is 74 beats per minute.…

A: Given,mean(μ)=74standard deviation(σ)=4

Q: In a survey, 18 people were asked how much they spent on their child's last birthday gift. The…

A: Given data in a survey 18 people were asked how much they spent on their child's last birthday gift.…

Q: The shape of the distribution of the time required to get an oil change at a 20 minute oil change…

A: The provided information is  µ=21.6 s=4.6 n=40…

Q: It is known that the weights of mangoes harvested in a farm are normally distributed with a mean of…

A:

Q: A learner has the following scores - an ACT composite score of 32 -an SAT mathematics score of…

A: Given For ACT x=32 Mu=21 Standard deviations=5.2 For SAT x=760 Mu=516 Standard deviations=116

Q: The Indian River County Health Department needs to estimate the proportion of all children in the…

A: "Since you have posted a question with multiple sub-parts, we'll solve the first three sub-parts for…

Q: Young's modulus is a quantitative measure of stiffness of an elastic material. Suppose that for…

A: Given: Mean = 70 Gpa Standard deviation = 1.6 Gpa

Q: A distribution of values is normal with a mean of 173.3 and a standard deviation of 31.9. Find P77,…

A:

Q: On a 9 question multiple-choice test, where each question has 3 answers, what would be the…

A:

Q: a. What is the appropriate test to be used for this study? b. State the Null and Alternative…

A: HERE AS PER POLICY I HAVE CALCULATED 3 SUBPARTS , Here given , 14% of all Americans suffer from…

Q: The mean useful life of car batteries is 54 months. They have a standard deviation of 6. Assume the…

A:

Q: Question 4 of 5 The following are the starting salaries (in thousands of dollars) of a sample of new…

A: The following data has been provided:…

Q: Construct a 95% confidence interval of the population proportion using the given information x=240…

A: Confidence interval is the range indicate the occurrence of population parameter. It is has two…

Q: You may need to use the appropriate appendix table or technology to answer this question. Consider…

A: Given Sample mean=19.1 Standard deviations=2 n=50

Q: What is the Sample Skewness for the following numbers: mean of 106.89 , median of 87, and…

A: Answer:- What is the Sample Skewness for the following numbers:                 mean of 106.89 ,…

Q: (i) What distribution can we assume for the number of customers coming into a DMV in Los Angeles,…

A: Given the two statements: (i) What distribution can we assume for the number of customers coming…

Q: farmer would like to know the average mass of his one-month-old pigs. To do this, he measured the…

A: Given Mean=15.25 Xbar=15.25 Standard deviation=2.12

Q: A physicist claims that the average wind speed in a certain city is 8 miles per hour. A sample of 33…

A: Given that: Population mean, μ=8 Sample mean, x¯=7.9 Population standard deviation, σ = 0.6 Sample…

Q: r the points below find the regression line using least square fit. Please draw the full table as…

A: x y 1 10 2 6 3 9 4 50 5 22 6 20 7 30 8 30 9 35 10 38 55 250

Q: Sketch a standard normal curve and shade the area that lies to the left of a. 2.19, b. -1.63, c. 0,…

A: a)Givenleft of 2.19

Q: What percentage of ACT composite scores are below 31? Recall the following: For the ACT, the mean…

A: The provided information is  µ=21 σ=5.2 The area below 31 P(X-µσ&lt;31-215.2)=P(Z&lt;1.92)In the…

Q: For Americans using library services, the American Library Association (ALA) claims that 67% borrow…

A: For Americans using library services, the American Library Association (ALA) claims that 67% borrow…

Q: 3. Use Slovin's Formula to compute for the value of n (number of samples) needed if the percentage…

A: here slovin's Formula  n = N1 + Ne2   N= population  =  2070  e= error = 4% =0.04

Q: Find a and 3 by applying linear regression. yea 103 0.7 0.9 0.0588 0.2727 0.3684 0.4576 | 13 0.6191…

A: Given: Sample size n = 6   Formula Used: Y = A1 X + A2 A1 = n∑XY-∑X∑Yn∑X2-∑X2 A2 = Y-A1X

Q: Find the mode and midrange.

A: Given data is…

Q: Rick operates a concession stand serving Iced Tea at the Los Angeles County Fair.  Ben is the only…

A:

Q: Given that: Population mean, μ = 8 Sample mean, x = 7.9 Population standard deviation, o=0.6 Sample…

A:

Q: What is the probability that 8 out of 12 customers will see dramatic results? What is the…

A:

Q: The sales of a company (in million dollars) for each year shown in the table below (25) X(year) 2005…

A: The given data is: X Y 2005 12 2006 19 2007 39 2008 37 2009 45

Q: According to an article, 36% of adults have experienced a breakup at least once during the last 10…

A: As per our guidelines we are suppose to answer only three subparts…

Q: Slovin's Formula ( 1. Solve for the value of n given that the total population is 7500 and the…

A: Note: As per guidelines we are supposed to solve only one question at a time. Kindly repost the…

Q: Let p be the population proportion for the following condition. Find the point estimates for p and…

A: Given that  Sample size n =4488 Favorable cases x =3105

Q: A particular fruit's weights are normally distributed, with a mean of 304 grams and a standard…

A:

Q: Each of the following is a confidence interval for μ = true average (i.e., population mean)…

A: