After smoking marijuana, 7 out of 100 subjects failed a driving test. Only 7 out of 140 subjects not under the influence of marijuana failed the test. Let p1 denote the population proportion of marijuana users that fail the test, and let p2 denote the population proportion of users not under the influence that fail the test. Find an 80% confidence interval for p1 − p2. (-0.020, 0.060)

Q: A poll of 1142 voters asked what the most significant issue was in the upcoming election. 1028 of…

A: X=1028, n=1142 α=0.14 p^=X/n= proportion Margin of error=MOE=Zα/2p^(1-p^)n

Q: A DNP student wants to evaluate the change in knowledge scores of a group of cardiac patients after…

A: In given problem, a DNP student obtains a pretest at the beginning of class and immediately after…

Q: following is a 95% confidence interval for the proportion of all students at the school who ate…

A:

Q: LONstruct the 90% confidence interval for the difference P₁ P₂ when x₁ = 45, n₁ = 85, x₂ = 20, and…

A: We have given that,  X1 = 45, n1 = 85 and X2 = 20, n2 = 65 Then,  We will find the 90% confidence…

Q: A random survey of 495 adults found that 59 had diabetes. Which of the following is a 98% confidence…

A:

Q: A recent study was conducted in which a random sample of men and a random sample of women were…

A: Given:  Confidence Interval = (0.133,0.207) = (13.3%, 20.7%)

Q: Construct both a 90% and a 80% confidence interval for B1. B, = 44, s = 4.7, SS= 43, n = 12 90% :…

A: Obtain the 90% confidence interval for slope. The 90% confidence interval for slope is obtained…

Q: Executives of a supermarket chain are interested in the amount of time that customers spend in the…

A: We are given that the mean shopping time spent by customers at the supermarkets is The sample mean…

Q: Given the following information: My confidence intervals: 90% confidence interval = (2.33, 2.56),…

A: 1. The obtained confidence intervals are: 90% confidence interval = (2.33, 2.56), and 99% confidence…

Q: D. The same collge president is more interested in testing her suspicion that the proportion of…

A: Given, Population proportion p=0.37 Sample proportion p^=0.3736 n=364 Null and alternative…

Q: You have a sample of 9 men and a sample of 8 women. The degrees of freedom for the t value in your…

A:

Q: A psychiatrist is interested in finding a 95% confidence interval for the tics per hour exhibited by…

A: Given Information: n = 12 7 9 7 10 1 6 8 7 2 12 7 9 For the data, summary statistics can be obtained…

Q: We would like to know: "What percentage of college students drink alcohol every day?" In a random…

A:

Q: A history teacher records the SAT scores of all 87 of her students. The data is used to construct a…

A: For calculating the confidence interval, we need to satisfy the following conditions: Independence…

Q: A 95% confidence interval for the difference in proportions of rotted fruit between Orchard A and…

A: A 95% confidence interval for the difference in proportions of rotted fruit between Orchard A and…

Q: Let p₁ be the proportion of students in English class who receive grade A, and p2 be the proportion…

A: Given,the sample proportions of Grade A in English class and Maths class.To choose the correct…

Q: wo different researchers measured the weight of two separate samples of ruby-throated hummingbirds…

A: a) Two researchers get different answers.  The researchers have two different samples. 95%…

Q: A survey of folk music fans yield this 95% confidence interval estimate of the proportion of fans…

A: Introduction:The 95% confidence interval for the requires proportion is (0.74, 0.86). So, lower…

Q: A 95% confidence interval forp is given as (0.34,0.66). How large was the sample used to construct…

A: Formula for the sample size needed to estimate a population proportion is

Q: A human resource manager wants to see if there is a difference in the proportion of minority…

A: Confidence Interval: Confidence interval is the interval estimate of the population parameter. It is…

Q: Achievement 96 94 62 91 77 86 71 59 63 GPA 2.7 3.1 1.6 3.2 3.0 3.8 2.6 3.0 2.2 Achievement 84 98 75…

A: Given Data : X = Achievement Y = GPA 96 2.7 94 3.1 62 1.6 91 3.2 77 3 86 3.8 71 2.6…

Q: Out of 800 adults selected randomly from one town, 272 have health insurance. Find a 90% confidence…

A: Given,   The sample proportion is,

Q: For a sample of size 120, x= 3486. Suppose we know that σ = 650. The 58.2% confidence interval is (

A:

Q: A poll of 60 women and 40 men finds that 80% of the women and 70% of the men like a certain movie.…

A: Given that, Sample size of women n1=60 Sample size of men n2=40 Sample proportion of women who like…

Q: Executives of a supermarket chain are Interested in the amount of time that customers spend in the…

A: We have to fill blanks.

Q: Executives of a supermarket chain are interested in the amount of time that customers spend in the…

A: The provided information is:

Q: Assume that on average undergraduate students drink 7.5 cups of coffee per week (with a population…

A: The objective of the question is to identify the appropriate statistical test to run given the…

Q: ppose a data set of 4,000 observations (n-4,000) was analyzed using OLS to examine the factors…

A: In the question we are given the Regression equation for College gpa while independent variables in…

Q: The 85.7% confidence interval estimate for p was (0.14, 0.16). Find ?′ and ME

A:

Q: In random, independent samples of 400 adults and 325 teenagers who watched a certain television…

A: Find z-critical value:…

Q: Peggy constructed the 95 percent confidence interval (4.8,5.2)(4.8,5.2) to estimate the slope of a…

A: If an interval is introduced as an estimate of the unknown parameter, then it is interval…

Q: Surveys were sent to a random sample of owners of all-wheel-drive (AWDAWD) vehicles and to a random…

A: Solution: State the hypotheses. Null hypothesis: That is, there is no difference in the proportion…

Q: Now you are interested in the percent of dogs that were neutered in your sample. For 40 dogs, 30 of…

A:

Q: What are the null hypothesis (H,) and the alternative hypothesis (H,) that should be used for the…

A: The type I error is defined is as rejecting the null hypothesis when actually it is true.  The type…

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.