, what is the test statistic and p-value?

Q: 15% of all college students volunteer their time. Is the percentage of college students who are…

A:

Q: A meteorologist is concerned about the number of tornadoes in her county. Using data from the past…

A: (a)Here, the claim is that true proportion of days with a tornado during peak season is greater than…

Q: Suppose 225 subjects are treated with a drug that is used to treat pain and 55 of them developed…

A: The hypotheses are given below: Null hypothesis: H0: p=0.20. Alternative hypothesis: Ha:p>0.20.…

Q: Recently a large academic medical center determined that 10 of 22 employees in a particular position…

A: Given, p=0.48  x=10 n=22 p^=xn=1022=0.454545

Q: A state’s Department of Commerce reports that 78 percent of all small businesses that applied for a…

A: As per our guidelines, we are allowed to answer only first question, Since the above paragraph…

Q: A teacher is interested in whether the number of bullying incidents by active bullies varies by…

A:

Q: 17% of all college students volunteer their time. Is the percentage of college students who are…

A: 17% of all college students volunteer their time. Is the percentage of college students who are…

Q: If we have a sample of size 100 with sample mean breaking strength of 1050 pounds from a population…

A: Sample size (n)=100 Mean breaking strength (x¯) = 1050 pounds Standard deviation (σ)  = 200 pounds…

Q: A state’s Department of Commerce reports that 78 percent of all small businesses that applied for a…

A: As per our guidelines, we are allowed to answer first question only. Thanks. Please post next…

Q: 2. From historical data, it is believed that 60% of California voters favored the death penalty. A…

A: Given: n=400 and p=60%=0.6. a) The expected value of sample proportion isμp^=p=0.6   The variance of…

Q: 2. Is there a difference in the proportion of individuals with food allergies between young children…

A: The sample proportions are The pooled proportion or weighted estimate of p is,

Q: 17% of all college students volunteer their time. Is the percentage of college students who are…

A:

Q: A meteorologist is concerned about the number of tornadoes in her county. Using data from the past…

A: I solve this problem using Excel.

Q: A carnival game is designed so that approximately 10% of players will win a large prize. If there is…

A: Solution: Given n= 100 Sample size  p= 0.10 Population proportion.  The condition or assumption for…

Q: A computer manufacturer believes that the proportion of hardware malfunctions is different in humid…

A: Given, The manufacturer takes a random sample of 400 machines sold in Florida (humid) and 400…

Q: In a one-way ANOVA, in theory, when the null hypothesis is true, MSWithin should be __________…

A: In ANOVA we have to test that our factor has significant effect on response or not.

Q: A computer manufacturer believes that the proportion of hardware malfunctions is different in humid…

A: Given Information: Claim: proportion of hardware malfunctions is different in humid climates than in…

Q: Only 20% of registered voters voted in the last election. Will voter participation decline for the…

A: The provided information are:

Q: A hypothesis test is conducted with a level of significance of  10%  and the resulting  p  value is…

A:

Q: A state’s Department of Commerce reports that 82 percent of all small businesses that applied for a…

A: The margin of error is, E = 0.0525, If the prior information is unknown, assume the value of sample…

Q: Is the proportion of wildfires caused by humans in the south lower than the proportion of wildfires…

A: From the given information, n1=559, x1=445n2= 544, x2 =459α =0.05 Let p1 and p2 are proportions of…

Q: A state’s Department of Commerce reports that 78 percent of all small businesses that applied for a…

A: Given : Claim : A state’s Department of Commerce reports that 78 percent of all small businesses…

Q: A newsletter publisher believes that less than 32% of their readers own a laptop. For marketing…

A: Decision : Reject the null hypothesis.

Q: fast-food

A:

Q: criminologist was interested in whether there was any disparity in sentencing based on the race of…

A: Black White Mean 6 4.8 Variance 3.25 6.1778 Observations 9 10

Q: Does stretching before exercise reduce the chance of injury? To answer this question, a random…

A: Hypotheses: Let p1 denotes the proportion of athletes do not stretch prior to exercise. Let p2…

Q: A sample of 100 flounder have a sample mean weight of 21.5 grams. Scientists wish to perform a…

A: Solution: Here, it is to be determined that if the mean weight differs from 20 grams. State the…

Q: The value for the test statistic for a left-tailed one mean z-test is z= -1.19. Determine the…

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

Q: Interpret the P-value.

A: here given , A store manager claims that 60% of shoppers who enter her store make a purchase. To…

Q: A random sample of 54 students from a college are selected from a normal population with mu equal to…

A:

Q: Suppose that you've collected gpa data for a simple random sample (SRS) of Business majors (Group…

A: The null and alternate hypothesis for ANOVA are Now, it says that we have rejected the null…

Q: Is the proportion of wildfires caused by humans in the south lower than the proportion of wildfires…

A:

Q: In a clinical trial, 227 subjects were treated with a pain medicine and 52 of them developed nausea.…

A: Givensample size(n)=227x=52p^=xn=52227=0.2291α=0.05

Q: What decision should the researcher make based on the results of the hypothesis test

A: Test is that whether or not the proportion of high school athletes who go on to play sports in…

Q: A company wants to show that its cancer drug is effective. To meet the rules it must show that it…

A: The probability of type II error is defined as the probability of not rejecting the null hypothesis…

Q: Historically, the percentage of residents of a certain country who support stricter gun control laws…

A: State the hypotheses. That is, the population proportion that supports stricter gun control equals…

Q: The social scientist conducted a study among married couples to determine if the occurrence of…

A: If the two samples are taken from the same population and the mean significant difference between…

Q: A carnival game is designed so that approximately 10% of players will win a large prize. If there is…

A: Given  p=10% , n=100, x=19

Q: Suppose we have samples of five men and of five women and have conducted a randomization test to…

A: The data represent sample of five men and five women conducted a randomization test to compare the…

Q: * with economical concerns being so great, many people are no longer purchasing new vehicles, but…

A: Solution : Given that : x̅ = 6.2 σ = 1.2 n = 35 a)Ho : µ = 6Ha : µ ≠ 6

Q: Are freshmen psychology majors more likely to change their major before they graduate compared to…

A:

Q: 20% of all college students volunteer their time. Is the percentage of college students who are…

A: It is given that the number of students who volunteered their time (x) is 61 and the sample of…

Q: Are blonde female college students less likely to have boyfriends than brunette female college…

A: pblonde  = 446/639 = 0.698 pbrunette  = 512/720 = 0.711

Q: Recently, a large academic medical center determined that 13 of 20 employees in a particular…

A:

Q: Are freshmen psychology majors less likely to change their major before they graduate compared to…

A: Given that,sample one, x1 =353, n1 =665, p1= x1/n1=0.5308sample two, x2 =371, n2 =664, p2=…

Q: A researcher took a random sample of 200 new mothers in the United States (Group 1) and found that…

A:

Q: Two different simple random samples are drawn from two different populations. The first sample…

A: The pooled estimate is, p¯=r1+r2n1+n2=18+145640+2000=14742040=0.7225 The pooled estimate is 0.7225.…

Q: Suppose we are planning a clinical trial and expect a 20% success rate in the active group and a 10%…

A: Given information:- Use the following Excel steps to generate 100 simulations for p = 0.10 and p=…