A construction company wants to estimate how likely it is that one of the screws they use for their work will fail. They want a margin of error of 5%, but a 99% level of confidence. What is the sample size they will need to assure they have these specifications? Round to the nearest whole number.

Q: A Cilain or Pestaurants has historically had a mean wait time of 6 minutes for its customers.…

A:

Q: Find 64th percentile, P64, from the following data 100 110 160 180 190 210 220 260 280 290 310 | 350…

A: Solution

Q: The following table shows the rate R of vehicular involvement in traffic accidents (per 100,000,000…

A: The dependent variable is the accident rate, R and the independent variable is speed, s. The…

Q: Late Night TV Hosts' Yoarly Salaries (millions) Jon Stewart (The Daly Show $35 $12 Jimmy Fallon (The…

A: Primary data The data which are collected manually first hand by the surveyor are called Primary…

Q: . Find the least square line for the data (a) (b) yk f(xk)

A: a) Excel Procedure: Enter xk and yk in Excel>Data>Data Analysis> ‘Regression’>Select yk…

Q: 4. Can the speed of a vehicle be predicted by the age of its driver? The speeds Y (in km/h) of a…

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

Q: 2. SWIMMER'S FLEXIBILITY STUDY Some statistics Before: mean = 19.4160; median = 18.46 After: mean =…

A: we will use shapiro wilk test for normality of data.

Q: A forester with the National Park Service was tasked with estimating the average age of the bald…

A:

Q: A professor believes that, for the introductory art history classes at his university, the mean test…

A: Sample mean (x̅1) = 79.5Sample mean (x̅2) = 80.7Sample size (n1) = 200Sample size (n2) = 250Standard…

Q: Found h Rank Page Order 5.1 The following table represents the market share percentage for each firm…

A:

Q: The CEO of battery manufacturing company claims that an average battery lasts 300 days. A researcher…

A: Given n=sample size=15, sample mean x̄=290, population mean μ=300 , sample standard deviations s=50…

Q: The table below shows the heights of all fourth-grade students in a particular school, and the…

A: The given table below shows the heights of all fourth-grade students in a particular school, and the…

Q: The table below shows the choices made by 125 players on the first turn of a Rock-Paper-Scissors…

A: We want to test the goodness of test

Q: You are invited to play a game in which 2 coins are tossed. If the both coins come up heads, you win…

A: Explanation: Here given the play game which 2 coins or tossed ,both coins comes head all the values…

Q: The accompanying data represent the miles per gallon of a random sample of cars with a…

A: For the given data find the required blanks

Q: From the results below, what test of association would be best to use with these two variables? List…

A: There are several measures of association depending on the type of variables.

Q: Price IndPrice PriceDif AdvExp Demand X1 X2 X4 X3 Y 3.85 3.80 -0.05 5.50 7.38 3.75 4.00 0.25 6.75…

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

Q: Ánswer the following problems. 1. Independent random samples were selected from two populations. The…

A: The two independent random samples selected from two populations. The given table is,…

Q: Given that u = 81, o = 20, and n = 49 Find the Probability of the following: a) x 85

A:

Q: Using Excel, conduct a t-test (at the alpha = 0.01 significance level) on whether the mean of X2 is…

A:

Q: A regression analysis between sales (in $1000) and price (in dollars) gives the following equation:…

A: We have given that  The regression equation is, y^ = 40000 - 5x and r = 0.6

Q: a) How many possible combinations are there for matching all 6 numbers? b) What is the probability…

A: here given  there are total 28 number available for selection  player select 6 number

Q: Find the area of the shaded region under the standard normal distribution between the given z-…

A: Given that  Z follows standard normal distribution with mean zero and standard deviation one  Find…

Q: Assuming that the samples come from the normal distributions, find the margin of error E and the…

A: We have given that the samples come from the normal distributions. The sample mean, sample standard…

Q: 1 2 3 4. 894 1254 1810 2438 3252 4466 Use exponential regression to find an exponential function…

A: Introduction: We need to fit an exponential and a linear regression to the data.

Q: Pain medications sometimes come with side effects.  One side effect is dizziness.  A researcher…

A: We have given data   Tordol Placebo Naproxen Tylenol Advil Dizziness 83 32 36 5 8 No…

Q: Overproduction of uric acid in the body can be an indication of cell breakdown. This may be an…

A: Given that  Sample size n =15 Sample mean =5.36 Population standard deviation =1.93

Q: Drill lifetime: A sample of 50 drills had a mean lifetime of 12.05 holes drilled when drilling a…

A: From the given information we find the solution.

Q: 2. Which measures of central tendency can be used for the variable below? Explain why each of the…

A: Mode or Median are used for given data. Mean is not suitable for given data because given variable…

Q: Researchers were interested in assessing the effects of a new treatment on seasonal affective…

A: For the given data MS subjects = ?

Q: Determine whether this study is observational or experimental. In 2006, a research team asked…

A: There are basically two types of study, they are observational and experimental study. Observation…

Q: What is the difference between data treatment and data analysis?

A: Solution: It is to mention the difference between data treatment and data analysis.

Q: Hypothesis testing using t: One-sample We test if artificial sunlight during the winter months…

A:

Q: The National Academy of Science reported that 33 % of research in mathematics is published by US…

A:

Q: If Sandy can afford car payments of ​$260 per month for 5 ​years, what is the price of a car that…

A:

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those…

A: Given Standard deviations=15 Mean=100 X=110

Q: Find the z-score for the given shaded region under the standard normal distribution. Round your…

A: We have given that the area of shaded region is 0.62.

Q: Give the numerical value of the mean of the sampling distribution of p̂. (Round your answer to two…

A: It is given that Population proportion p = 0.32 Sample size n = 34 Note : According to our…

Q: At a=0.05, what is the critical value? -1.984 1.66 -1.645 -1.66

A:

Q: Using Excel, conduct a t-test (at the alpha = 0.10 significance level) on whether the mean of X2 is…

A: The question is based on hypo. testing of a popl. mean. As popl. std deviation is unknown we need to…

Q: Given the z value, find the are under the normal curve for the given parameter: To the left of z =…

A:

Q: A business owner recently sent out a survey to determine if the percentage of thier customers who…

A: It is given that sample size (n) is 236 and x is 164.

Q: The resumes of two male applicants for a college teaching position in Engineering Data Analysis are…

A: Given Information: The resumes of two male applicants are placed in the same file as the resumes of…

Q: A forester with the National Park Service was tasked with estimating the average age of the bald…

A:

Q: Find the z values for each of the following x values for a normal distribution with mean = 30 and a…

A: a) Consider that the mean and standard deviation of a random variable x are µ and σ, respectively.…

Q: A population consists of the following values 2, 4, 6, 8 and 10. List down all the possible samples…

A: Given that the population contain following values,  2,4,6,8,10 And if we draw a samples of size 3…

Q: Suppose that a small country with a population of 2,800,000 that consists of four states, A, B, C,…

A: From the provided information, Total population = 2800000 Number of seats = 140

Q: Ho: µ = 62.3 H1: µ < 62.3 You believe the population is normally distributed, but you do not know…

A:

Q: 2. Below are the results of a Chi-Square test using the variables "believing astrology is…

A: Introduction: We need to answer the questions using the given output.

Q: Suppose you are given the following two dimensional (2D) points. 3 3 1 10 15 8 1 7 10 10 12 11 When…

A: a b c d e f g h x 3 3 1 7 10 15 6 8 y 1 5 3 7 10 10 12 11 Manhattan Distance Formula…