To test the claim that american quarters are biased towards heads, suppose you flip an american quarter n=1000 times and obtain x=515 heads. You determine the p-value for this result is p=0.1714. what is your conclusion.

Q: You want to test whether the pH level of the drinking water is 8 using 36 water samples. The…

A:

Q: The recommended daily Calcium intake for women between the ages of 21 and 50 is 1000 mg per day. The…

A: Statistical tests are used to calculate the test statistic and p-value. This calculated test…

Q: In a one-tail test, the p-value is found to be equal to 0.0026. If the test had been two-tailed, the…

A:

Q: (b) The proportion of adults living in a small town who are college graduates is estimated to = 0.6.…

A:

Q: According to a 2001 Reader's Digest article, S0% of physicians over the age of 55 have been sued at…

A:

Q: As a researcher using ANOVA, in order to reject the null hypothesis, we need the F ratio to be:…

A: F- test for ANOVA: The F test is to determine whether the means of more than two groups are equal.…

Q: In a sample of 49 men, 38 said that they had less leisure time today than they had 10 years ago. In…

A: The claim is that there is a difference in the proportions.

Q: You are testing H0: u=10 vs Ha: u<10 using a t-test with 21 degrees of freedom. If the p-value of…

A: Given information- We have given the Hypothesis Null Hypothesis: Ho: µ = 10 Alternative Hypothesis:…

Q: Use the following information for questions 1 and 2.  Independent random samples of individuals…

A: Given that,sample one, x1 =40, n1 =200, p1= x1/n1=0.2sample two, x2 =27, n2 =175, p2=…

Q: What proportions of males and females wear a facemask while in a large parking lot? There is some…

A: p^m=Xmn

Q: Suppose you are testing Ho : μ = 104 against Ha μ< 104. From an SRS of 70 individuals, you compute =…

A: It is interpreted that, the study involves 70individuals (i.e., n sample size=70). And the sample…

Q: When you are going to use a two tail t test and the estimated power of your study is .20 (small),…

A: Given, Power = 0.20

Q: For a one tailed test evaluating a treatment that is supposed to decrease scores, a researcher…

A: The null and alternative hypotheses are;The null hypothesis states that the scores are unaffected by…

Q: A sample of n = 4 scores is selected from a population with μ = 50 and σ = 12. If the sample mean is…

A: Given datan = 4μ = 50 and σ = 12, sample mean M= 56z-score is given by

Q: Biologists were studying the proportions of cats that had spotted markings on their fur in two…

A: Correct answer is  (A)

Q: What percentage of scores is between a z of ‐2 and a z of +2? Why is this important?

A: Use Empirical rule to solve it

Q: Based on this information, which one of the following statements is correct?                If a…

A: We have given that  Claim: The true population proportion of adults who favour the colour purple is…

Q: Brady manages a small airline, and their goal is for 90% of passengers to say they are satis Suppose…

A: When the variable of interest is categorical in nature, it indicates that we are dealing with the…

Q: A researcher obtains t= 2.25 for a repeated-measures study using a sample ofn=10 participants. Based…

A: It is given that t= 2.25. Df = n- 1 = 10-1 = 9.   For α = 0.05: It is given that α = 0.05, the area…

Q: A doctor used to believe that babies were equally likely to be born any day of the week, but with…

A: Given info: The chi-square test statistic for goodness of fit is χ2 = 12.95 and the P-value is…

Q: In a previous year, 53% of females aged 15 and older lived alone. A sociologist tests whether this…

A: The hypothesized proportion is 0.53.

Q: Is a value of r=0.75 from a sample of 100 more significant than a value of r=0.30 from a sample of…

A:

Q: The level of significance for a hypothesis is 0.01. If you compute a p-value of 0.0157 what decision…

A: Level of significance = 0.01 p-value = 0.0157

Q: Suppose a 95% CI for the proportion of adults that regularly attend a tae kwon do class at least…

A: From the provided information, Confidence level = 95% The confidence interval = (0.2534, 0.3894)

Q: In a survey, 45% of the respondents stated that they talk to their pets on the telephone. A…

A: It is given that in a survey 45% respondents accept that they talk to their pets on phone. To check…

Q: For a hypothesis test of Ho :H = 70 versus HA:µ < 70: • The given sample has a test statistic of…

A: We have the values,  Xbar = 67.1 and ? = 18.3  And n = 36 . We have to find p-value ?

Q: There are 10,000 experiments, the average p-value is 0.0385 and the sd is 0.0125. The null was true…

A: From the given information, There are 10,000 experiments, the average p value is 0.0385 and the sd…

Q: Ha: µ > 50. Should Ho be rejected at 0.05 level of significance? Ha: µ < 50. Should Ho be rejected…

A:

Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

A: given  P0 =0.37 n=170

Q: The Associated Press found that 730 of 1000 randomly selected adults preferred to watch movies at…

A: Null and alternative hypotheses: The hypothesis, which is pre assumed as true, tentatively settled…

Q: An individual is selected from a normal population with a of μ = 80 with σ= 20, and a treatment is…

A: It is given that the mean is 80 and the standard deviation is 20.

Q: A tax accountant would like to test the claim that the proportion of individuals who owe when filing…

A:

Q: In a survey, 31% of the respondents stated that they talk to their pets on the telephone. A…

A: The hypothesized proportion is 0.31.

Q: 18. A test of the hypotheses Ho: =0 vs. H.: p>0 was conducted using a sample size of 7. The test…

A: Null and the alternative hypothesis: The value of test statistic is, t = 1.935. Degree of freedom:

Q: 3. Suppose that the psychologist in the previous question predicted that girls have higher verbal…

A: Note: "Since you have asked multiple question, we will solve the first question for you. If you want…

Q: Suppose your psychic friend correctly identified more than 25% of the cards.   a. A hypothesis test…

A: A friend who claims to be a  psychic,  correctly identified suits of 100 cards more than 25%.A…

Q: For any population, a z-score of -2.00 is a more extreme score than a z-score of +1.00. TRUE OR…

A: Z-score: The z-score determines the relation of the individual values with mean of distribution. The…

Q: In a survey, 43% of the respondents stated that they talk to their pets on the telephone, A…

A: The hypothesized proportion is 0.43.

Q: 1) what are the Z scores for Jason‘s desired salary at Company A and Company B? Please round your…

A: The z-score for Jason's desired salary at Company A is, z=x-μσ=55000-515002050=35002050=1.7073≈1.71…

Q: If the p-value is less than or equal to a ,we reject the alternative * (hypothesis (p s a True False

A: We have to identify given statement is true or false?

Q: A population with a mean of u = 8 has EX 40. How many scores are in the population?

A: From the provided information, Mean (µ) = 8 ∑X = 40

Q: We would like to test the hypothesis H0: μ = 20 versus the alternative that Ha: μ ≠ 20. From a…

A: Given that: t-Distribution with t= 2.3 and sample size= 30 Now will use standard t-distribution…

Q: A new insecticide is advertised to kill more than 95% roaches upon contact.  In a laboratory test,…

A: Given,   The sample proportion is,

Q: A polling company conducted a hypothesis test to see if people are happy with the government, and…

A: Given : A polling company conducted a hypothesis test to see if people are happy with the…

Q: If I calculate a z test statistic of 4.84, and my α=0.05, what decision should I make about the…

A: Given that  Z-test statistic = 4.84 Level of significance (α) = 0.05 It is two tailed test .…

Q: Males and females were asked what they would do if they received a $100 bill in the mail that was…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: 1. A psychologist is interested in investigating the proportion of depressed teenagers in a…

A: As per our guidelines we are suppose to answer only one question.

Q: A researcher obtains t=2.35 for a repeated measures study using a sample of n=8 participants. based…

A: Note : - Here significance level is not given, So assuming General significance value i.e α = 0.05…

Q: A sample of 100 yielded a test statistic of 2.1. For a level of significance of 0.05, the null…

A: From the provided information, Sample size (n) = 100 Test statistic (z) = 2.1 Level of significance…

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.