Alpha again Environmentalists concerned about theimpact of high-frequency radio transmissions on birdsfound that there was no evidence of a higher mortalityrate among hatchlings in nests near cell towers. Theybased this conclusion on a test using a = 0.05. Wouldthey have made the same decision at a = 0.10? Howabout a = 0.01? Explain.

Q: After conducting a one-sample Z-test, you arrived at a value of -12.5 for the z value. What is your…

A:

Q: According to a survey, 9% of small businesses use telecommuting of workers in an effort to reduce…

A:

Q: A researcher administers a treatment to a sample from a population with a mean of µ = 60. If the…

A: From the provided information, The researcher administers a treatment to a sample from a population…

Q: Determine if this test is left-tailed, right-tailed, or two-tailed. Oleft-tailed Oright-tailed…

A: given data : 436,425,418,428,436,429,420,417,424,417,426,437,433,424,428,436,422,438,436,427

Q: A classic example of how fallacious statistical thinking can creep in. It is the 1960s, and you are…

A: The hypothesis test is a statistical method in which one using the sample data try to check the…

Q: In recent years, approximately 55% of eligible voters take the time to vote in presidential…

A: The objective of this question is to determine whether there is convincing evidence at the 0.01…

Q: A random sample of n1 = 14 winter days in Denver gave a sample mean pollution index x1 = 43.…

A:

Q: A physical therapist wanted to know whether the mean step pulse of men was less than the mean step…

A: It is given that, the output of test between the two samples. The output includes the test…

Q: A reading specialist at Pleasantville High School suspects that there is a difference in the average…

A: In statistical hypothesis testing, a type I error is the rejection of a true null hypothesis (also…

Q: If you have a research scenario in which the IV has three or more levels and is between subjects in…

A: The objective of the question is to determine whether a One Way Between Subjects ANOVA is the…

Q: 6.- The day after Thanksgiving-called Black Friday–is one of the largest shopping days in the United…

A: A confidence interval (CI) is a type of estimate computed from the observed data. It gives a range…

Q: viruses typically cause common colds. In a test of the effectiveness of​ echinacea, 31 of the 38…

A: Given data : x1= 31.0 n1= 38 x2= 83.0 n2= 97 significance level, 0.01

Q: Do ESL students score lower in English college placement tests than the national average? A…

A:

Q: [defn) The Gallup News Service sent out 2,000 questionnaires for survey about climate change. 1,004…

A: The question is related to the sample survey. Gallup New Services sent out 2000 questionnaires for a…

Q: People who live near a former rocket-tes are concerned that perchlorate is preser unsafe amounts in…

A: mean = 24.5 n = 28 sample mean = 25.3

Q: It is claimed that the proportion of OSU students who belong to a fraternity or a sorority is 0.15.…

A: P value will claculated by using z table

Q: Fourteen different video games showing drug use were observed. The duration times of drug use ​(in…

A: Given, n=14 df denotes Degree of Freedom.

Q: The Department of Agriculture wants to determine whether the mean yield per acre for a particular…

A: from the given information we find the 95% confidence interval.

Q: A study of parental empathy for sensitivity cues and baby temperament (higher scores mean more…

A: Solution: Given information: n1= 34 Sample size of mothern2= 40 Sample size of fatherx1= 69.04…

Q: A new diagnostic marker is being tested for the diagnosis of bovine encephalopathy. On a sample of…

A: To calculate the positive predictive value (PPV) and negative predictive value (NPV), you can use…

Q: mates that the average daily per-store theft is less than $100, but wants to determine the accuracy…

A: Mall security estimates that the average daily per-store theft is less than $100, but wants to…

Q: A NOmal population has a mean of M-7. AFter receiving treatment. a sample ofn=4 score ueilds the…

A:

Q: A dentist wanted to determine if a relationship existed between childhood fluoride exposure and…

A: Let ρ denotes the population correlation between years of fluoride and number of cavities. The test…

Q: You sampled 13 people and got their pre-diet weight and post-diet weight. If α=.05α=.05, the test…

A:

Q: Suppose the average blood sugar level in 35- to 44-year-olds is 4.86 (mmol/L). Do sedentary people…

A: The hypothesized mean is 4.86.

Q: A researcher predicts that scores in treatment A will be higher than scores in treatment B. If the…

A: Step 1: It is given that the researcher predicts that scores in treatment A will be higher than the…

Q: SS = 749.5 %3D SS = 830 %3D a. Use a one-tailed test with a = .05 to determine whether these data…

A: Given Data : we need to calculate standard deviations for both the samples , where the SS are given…

Q: Sal knows that parties of people on average spend 75 minutes at their restaurant. They wonder if…

A: Given  Sample mean x̄=82, n=sample size=30, s=sd=17, level of significance ɑ=0.05

Q: How Much Older Are Husbands? Exercise 2.213 introduces a dataset giving the ages of the two people…

A: 2.213

Q: Recent results suggest that children with ADHD tend to watch more TV than children who are not…

A: Given Information- Sample size, n = 36 Sample mean, x-bar = 4.9 hours Population mean, μ = 4.1…

Q: Metro Area Jobless Rate (%) Atlanta 7.1 Boston 5.2 Charlotte 4.3 Chicago 4.7 Dallas 5.8 Denver 5.8…

A:

Q: H1: p v (Please enter a decimal) c. The test statistic zv = (please show your answer to 3 decimal…

A: From the given What is the Alternative hypothesis Test statistic (z ) =? P value = ?

Q: What is the test statistic for this hypothesis test?

A: The Department of Agriculture wants to determine whether the mean yield per acre for a particular…

Q: The following data are from a hypothetical experiment in which one group of students took a quiz in…

A: In this study, one group of students took quiz in well-lit room and another group of students took…

Q: Recent results suggest that children with ADHD tend to watch more TV than children who are not…

A:

Q: The recidivism rate for convicted sex offenders is 12%.  A warden suspects that this percent is…

A: To test whether the percentage is different if the sex offender is also a drug addict, we use two…

Q: Consider a population with the following. ? = 50 and ? = 5.7 (a) Calculate the z-score for an x of…

A: Given data, μ=50σ=5.7n=39

Q: The Department of Agriculture wants to determine whether the mean yield per acre for a particular…

A: The random variable yield per acre for a particular variety of soybeans follows normal distribution.…

Q: The 2006 Statistical Abstract of the United States reports on a survey that asked a national sample…

A: Given that  Sample size (n) = 80000 Suppose  that one-third of all American households own a pet…

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.