study of cell phone use and brain hemispheric​ dominance, an Internet survey was​ e-mailed to 2482 subjects randomly selected from an online group involved with ears. 1095 surveys were returned. Construct a 90​% confidence interval for the proportion of returned surveys.   ***QUESTION** Identify the value of the margin of error E. E= ?

Q: In a survey, 10 people were asked how much they spent on their child's last birthday gift. The…

A: Here we need to construct an 80% CI for the mean amount of money spent on child's last birthday…

Q: A random sample of 25 statistics students was asked: "Have you smoked a cigarette in the past week?"…

A: From the provided information, Sample size (n) = 25 Six students reported smoking within the past…

Q: There are 3000 beads of various colors in a jar. In a sample of 125 beads, 40% were red. Calculate…

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Q: Thirteen out of the 137 randomly selected faculty members who were surveyed at a community college…

A: Obtain the 90% confidence interval for the proportion of all faculty member at the community college…

Q: knowing

A: Given: Total number of drivers = 383 Drivers who buckle up = 297 Proportion of drivers, p =…

Q: Freshman 15 The term "Freshman 15" refers to the claim that college students typically gain 15 lb…

A: The objective of this question is to find the probability that a randomly selected male college…

Q: In a study of cell phone use and brain hemispheric dominance, an internet survery was emailed to…

A: Obtain the 90% confidence interval for the true proportion of the returned surveys. The 90%…

Q: A 20-minute consumer survey mailed to 500 adults aged 25 to 34 included a $5 Starbucks gift…

A:

Q: Out of 400 people sampled, 32 had kids. Based on this, construct a 95% confidence interval for the…

A: Solution: Let X be the number of people had kids and n be the sample number of people. From the…

Q: Use the sample data and confidence level given below to complete parts (a) through (d). In a study…

A: a.

Q: In a survey, 14 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: suppose an individual was studying temperature's effect on crime rate. The researcher looked at 6…

A: Solution:The sample mean is obtained below:From the given information, number of observations is 6…

Q: A surprising number of young adults (ages 19 to 25) still live in their parents' homes. A random…

A: Sample taken for ages 19 to 25 2253 men and 2629 women random sample In which 986 men and 923 women…

Q: Suppose we want to test whether there is a difference between the room rates of luxury hotels in New…

A: It is given that 20 random luxury hotels in new York and 30 random luxury hotels in L.A.

Q: In a survey of 4052 ​adults, 723 oppose allowing transgender students to use the bathrooms of the…

A: It is given that x = 723 and n= 4,052.

Q: In a survey of 1005 adults 526 stated construct a 95% confidence interval

A:

Q: In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to…

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we…

Q: Illustrate the null hypothesis for a correlated t test?

A:

Q: Of 127 randomly selected adults, 31 were found to have high blood pressure. Construct a 95%…

A: Given that, Of 127 randomly selected adults, 31 were found to have high blood pressure.  X = 31 N =…

Q: A poll of 827 students at Alpha state college found that 61% of those polled preferred a quarter…

A: It is given that the proportion of the students who preferred a quarter system to a trimester…

Q: A random sample of 40 home theater systems has a mean price of $500 and a standard deviation of $60.…

A: Construct the 99% confidence interval for the population mean The 99% confidence interval for the…

Q: To study the perceptions of waiting time, a researcher conducted a survey of 100 prospective…

A: The provided information  x¯=5.2σ=1.2n=100α=0.10The critical value is zc=1.64  (from statistical…

Q: a research poll institute asked respondents if they fet vulnerable to identify theft. in the poll,…

A: Given Data: n=1002 x=595 α=0.05   Calculating the sample proportion p⏜=xn=5951002=0.5938 As n is…

Q: A surprising number of young adults (ages 19 to 25) still live in their parents' homes. A random…

A: Required conditions: n1>30 n2>30 n1*p1^>=10 n1*(1-p1^)>=10 n2*p2>=10 n2*p2^>=10

Q: A recent study showed that among 725 randomly selected subjects who completed 4 years of college,…

A: We have given that,  Favorable cases (X) = 139 and Sample size    (n) = 725 Then,  We will find 95%…

Q: In a study of cell phone use and brain hemispheric​ dominance, an Internet survey was​ e-mailed to…

A: Here we need to construct a 90% confidence interval for the proportion of returned survey. Sample…

Q: A sample of 3048 randomly chosen people found that 341 of them were left-handed. Construct a 99%…

A: Sample proportion=p^=xn=3413048Critical value for 99% confidence interval is=z=2.576n=sample…

Q: n a randomly selected group of 750 automobile deaths, 240 were alcohol related. Construct a 95%…

A: Given that,  x = 240, n = 750 The value of sample proportion is,

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

A: (d)

Q: andom sample of 1200 high school freshmen was taken and it was found that 559 of them were reading…

A: The population proportion (p) will be proportion of high school freshman who reads at or above their…

Q: A survey of 20 people asked, “If you’ve ever been married, how old were you when you were first…

A:

Q: I asked 45 randomly selected WSU college students how many US states they had visited. The students'…

A: The sample size is 45, sample mean is 3.8 and standard deviation is 1.5. The degrees of freedom is,…

Q: In a study of cell phone use and brain hemispheric dominance, an internet survey was emailed to 2400…

A: Given,n=2400x=916α=1-0.99=0.01α2=0.005Z0.005=2.58   (from Z-table)

Q: Insurance companies are interested in knowing the population percent of drivers who always buckle up…

A: Givenx=316sample size(n)=391Confidence level=95%p^=xn=316391≅0.8082

Q: In a randomly selected group of 650 automobile deaths, 180 were alcohol-related. Construct a 95%…

A:

Q: An item has a current value of 10. The value varies each day with mean of +0.08 and variance 0.09.…

A: Given: An item has a current value 10.mean=0.08Variance=0.09we have find the expect time he would…

Q: From a lake, an unknown proportion of fish have been tagged.  You collect a sample of 100 fish taken…

A:

Q: From a random sample of 64 high school seniors, the sample mean and standard deviation of the math…

A:

Q: Insurance companies are interested in knowing the popul drivers who always buckle up before riding…

A: Given data,No of people surveyed n=387who claims to buckle up is x=311Construct a 93 % CI?

Q: A sanatorium conducted a study on 3,500 women over 35 years of age, of whom 220 reported having…

A: Step 1: State the given data: number of favorable cases, x = 220sample size, n = 3500confidence…

Q: A surprising number of young adults (ages 19 to 25) still live in their parents' homes. A random…

A: Required conditions: n1>30 n2>30 n1*p1^>=10 n1*(1-p1^)>=10 n2*p2>=10 n2*p2^>=10

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.