(12 adults said they would travel to outer space in their lifetime, given the chance. Estimate the true proportion of adults who would like to travel to outer space with 88% confidence (Round to two decimal places). Estimate population proportion: New York Times poll found that 329 out of 763

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Population is the set of all objects of interest. For statistical studies, the complete population…

Q: A recent study indicated that 20% of 133 women over age 55 in the study were widows.  a. How large a…

A:

Q: A survey shows that 3/5 Australian adults are overweight and 1/10 Australian adults are obese. What…

A:

Q: Compute the p-value. Round to three decimal places.

A: Given Information,: We have number of sample n= 2027  Number of favourable x= 485 number of people…

Q: Of the 200 American film enthusiasts, the average age is: 30 years, while the standard deviation is…

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A: given data   event   A : age 18 to 39 years             B : approved of gay marriage   P(B) = 0.76…

Q: According to statistics reported on CNBC, a surprising number of motor vehicles are not covered by…

A: sample size(n)=218No. vehicles were not covered by insurance(x)=33

Q: A study sample was recruited to examine whether a smoking cessation program may be successful in the…

A: The objective of this question is to construct a 95% confidence interval for the true percentage of…

Q: A random sample of size 344 results in 150 successes. Build a 94% CI for the population proportion…

A:

Q: 3. In a Gallup Pool, 52% of 1038 surveyed adults said that second hand smoke is "very harmful". What…

A: Following information is given:   Total number of people survey = 1038 Percentage of people who said…

Q: A study of 4299 adults from country A found that 2248 were obese or overweight. The point estimate…

A:

Q: In a survey of 1009 parents of children ages​ 8-14, 74​% say they are willing to get a second or​…

A: Given n=1009 P=74%=0.74 E=2%=0.02

Q: A federal report indicated that 58% of children under age 6 live in poverty in Puerto Rico, an…

A:

Q: Compute the test statistic. Round to two decimal places.

A: Sample size, n=2027 No. of adults who drank diet soda, x=485

Q: Do 8% of Dallas citizens commute to work? A survey on commuting by car was done on a random sample…

A:

Q: A federal report indicated that 17% of children under age 6 live in poverty in Nevada, an increase…

A: Given data, p=17%=0.17 E=2%=0.02 z-value at 99% confidence is Zc=2.576 n=?

Q: In a random sample of 73 items produced by a machine, the quality control staff found 25 of them to…

A: Sample proportion is always a point estimate of population proportion

Q: sample proportion is p= und to three decimal places as needed.)

A: Given Number of sample of teenagers between 13 to 17 year of ages(n)=280

Q: ate the proportion of households with two cars. How large a sample is needed in order to be 95%…

A: Following information is given: Confidence level = 95% Prior estimate of population proportion = 40%…

Q: A report from 2012 states that 45% of American adults were obese. In this report, adults were…

A:

Q: A newspaper infographic titled "Baby's First Photo Reveal" summarized data from a survey of 1,000…

A: Answer is given by confidence interval.

Q: Among 250 cell phone owners aged 18-24 surveyed, 103 said their phone was an Android phone. Perform…

A: n=250x=103

Q: researcher wishes to estimate the proportion of the adult population of the U.S. has sleep…

A: E=0.03 99% confidence interval for z=2.576 p=0.5

Q: there is 70% chance they should hit atleast how many pitches this season?

A: Given that, there is 70% chance they should hit.

Q: The last student surveyed was active for 25 minutes. What percent of students were more active than…

A: It is given that Min = 4, Median = 25 and maximum = 86

Q: At the Fredericton High School it is estimated that at most 25% of the students ride bikes to…

A: Let, p = proportion of students who ride bikes to school

Q: ews/New York Times poll found that 329 out of 763 randomly selected adults said they would travel…

A: The value of z at 94% confidence level is 1.881, which can be found by using the standard normal…

Q: The results of a recent poll on the preference of teenagers regarding the types of music they listen…

A: Here is given that, two populations and two selected samples. We will use two proportion point…

Q: researcher wishes to estimate the proportion of drivers who use their mobile phone while driving. A…

A: Given data: Proportion of drivers = 0.38 Sample size(n)= 28 To find: The standard error of the…

Q: In each of Exercises, explain the effect on the margin of error and hence the effect on the accuracy…

A: Formula for the margin of error is given by

Q: A researcher named liza wants to estimate the mean age of pilots in an airline company. The…

A: Given: σ=6.30Length of the interval=3.2

Q: Can you reject the claim that the proportion of 18 to 24-year-olds living in their parents' homes…

A: Given that  Sample sizes n1=248 , n2=244 Sample proportion p1^=0.515 , p2^=0.412

Q: Suppose that I want to estimate the percentage of students who  love statistics in California. How…

A: Given information- Margin of error, E = 3% = 0.03 Confidence level, c = 90% Since nothing is known…

Q: In each of Exercises, explain the effect on the margin of error and hence the effect on the accuracy…

A: Effect on margin of error:If the sample size decreases, then the standard error of statistic…

Q: A 2014 Pew Research Center Survey asked 2,002 adults about the intersection of politics and science.…

A: The provided information are:Number of trials (n) = 2002Number of successes (X) = 1281

Q: Suppose that out of 10,351 convicts who escaped from U.S. prisons, only 7767 were recaptured. Let p…

A:

Q: The Humane Society is interested in finding out how many households in America have at least one…

A: The provided information are: Confidence level = 95% = 0.95 Margin of error (E) = 4% =0.04 From the…

Q: An economist predicts that in the next 50 years gas will be 0.02 based on the last 7 months of 2015.…

A: Introduction: It is required to identify the type of error that has been made in the conclusion.

Q: How many Biology students’ records need to be sampled to estimate the percentage who earn "A"s to…

A: The proportion is not provided therefore in worst case it can be assume as (p) 0.5. Margin of error…

Q: The state education commission wants to estimate the fraction of tenth-grade students that have…

A: Solution

Q: In a random sample of 500 teenagers 12 to 17 years old, it was found that 330 have regular access to…

A: A random sample of 500 teenagers 12 to 17 years old; n=500 It was found that 330 have regular access…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.