nternet service: An Internet service provider sampled  538  customers and found that  78  of them experienced an interruption in high-speed service during the previous month.  (b) Construct an  80%  confidence interval for the proportion of all customers who experienced an interruption. Round the answer to at least three decimal places.   An  80%  confidence interval for the proportion of all customers who experienced an

Q: Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of…

A: The claim is that 44% of parents who had children in grades K-12 were satisfied with the quality of…

Q: A study of 420,016 cell phone users found that 131 of them developed cancer of the brain or nervous…

A: Calculate the proportion of people who developed cancer of the brain or nervous system.

Q: A local news outlet reported that 56% of 600 randomly sampled Kansas residents planned to set off…

A: We have given that,  Sample proportion (p̂) = 56% = 0.56 and sample size (n) = 600 Then,  We will…

Q: #4 In a Roper poll of 3000 workers, 1680 said "they feel guilty that they don't spend more time with…

A: Ans#-  Given the level of confidence interval   99 %                                        Then   α…

Q: Construct a 99.8% confidence interval for the proportion of women who work at home who are college…

A: Given,n=519x=165p^=xnp^=165519=0.318The point estimation for the proportion is 0.318 .

Q: A survey of 700 non-fatal accidents showed that 167 involved uninsured drivers. Construct a 99%…

A: Given data,n=700x=167Point estimate isp=xn=167700=0.2386Construct a 99% confidence interval?

Q: Give a real life example of how confidence intervals are used.

A: Solution-: We want to get a real life example of how confidence intervals are used.

Q: n a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A: Solution: x (x-x) (x-x)2 6 -0.75 0.5625 8 1.25 1.5625 2 -4.75 22.5625 10 3.25 10.5625…

Q: Suppose we take a survey of 200 students and ask how much they study per week. The result is an…

A: From the above data  We are given that the  95% confidence interval is (10, 10.5). The population…

Q: We wish to estimate what percent of adult residents in Ventura County like chocolate. Out of 500…

A: The sample proportion of the sample of size n can be defined as:  Here, X = Total number of success…

Q: (b) Construct an 80% confidence interval for the proportion of smartphone owners aged 18-24 who have…

A: The sample size is 239 and number of success is 103.

Q: What is the upper bound of the confidence interval? A 98% confidence interval for the data: 25, 38,…

A: We have given data, X 25 38 62 45 61 38 21 42 31 35 The confidence level is 1-α=0.98.

Q: A Harris Poll in 2003 asked a national sample of 2316 adults whether they favored or opposed…

A: The random variable opposing follows binomial distribution. The sample size is 2316. The value of…

Q: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

A: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

Q: Determine from a confidence interval whether a test is significant?

A: Null hypothesis states that there is no difference between populations or a set of given…

Q: If n=540 and (p-hat) = 0.13, construct a 99% confidence interval. Give your answers to three…

A: We have given that,  Sample size (n) = 540  Sample proportion (p-hat) = 0.13 Then,  We will find the…

Q: Joe’s Pizza Joint found that 64.2% of the 328 pizzas sold last week included pepperoni. Find a98%…

A: Obtain the 95% confidence interval for the proportion of Joe’s customers that order pepperoni. The…

Q: Software testers have reported their testing results of your teams latest software release. Out of a…

A: Critical value: Consider α = 0.05. Using excel formula “=NORM.S.INV(1-(0.05/2))”, the critical value…

Q: Construct a 95% confidence interval estimate. How does this change your answer to (b)?

A: (d)

Q: In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A: For given sample, x¯=6.6667, from the excel function, =AVERAGE(G17:G28)s=2.2697  from the excel…

Q: If n=240 and X = 192, construct a 90% confidence interval. Enter your answer as an open-interval…

A: 1. The given values are n=240,x=192. The proportion of x is, p^=xn=192240=0.8 Computation of…

Q: In a hypothetical study (n=300), 100 patients were on antihypertensive medications. Generate a 95%…

A: The objective of this question is to calculate the 95% confidence interval for the true proportion…

Q: What does the 95% represent in a 95% confidence interval

A: Solution CI=95%

Q: A research institute asked students if they felt vulnerable to identity theft. In the poll, n=1047,…

A:

Q: A survey commissioned by the Southern Cross Healthcare Group reported that 16% of New Zealanders…

A: 1.Suppose p is the true population proportion of people, who consume five or more servings of drinks…

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 600…

A: According to the given information, we have Total number of adult residents sampled = 600 186 had…

Q: A sociologist develops a test to measure attitudes towards public transportation, and 37 randomly…

A: given that,sample mean, x =58.5standard deviation, s =19.7sample size, n =37standard error = sd/…

Q: % confidence interval for the mean percentage of airline reservations being canceled on the day of…

A: A 90% confidence interval for the mean percentage of airline reservations being canceled on the day…

Q: Several years ago, 46% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given  p=0.46, n=1055, X=488

Q: Newseek performed a poll in which 567 american patents were asked the question "would you prefer to…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.