An elementary school claims that the variation in reading score of its fourth grade students is less than some value. Determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed. left-tailed

Q: The owner of a professional basketball team claims that the mean attendance at games is over 22,000…

A: We have to identify type of test.

Q: are conducting a study to see if the proportion of voters who prefer Candidate A is significantly…

A: In hypothesis testing, a null hypothesis can be defined as the hypothesis of no difference or…

Q: According to national data, 17% of U.S. college students are a member of a sorority or a fraternity.…

A: Q.1 - Solution : Given that :-According to national data, 17% of U.S. college students are a member…

Q: In a left-tailed test, if the p-value but the null hypothesis is true, we made a Type I error. |

A: Here use basic of type 1 error

Q: A non-significant outcome means that the data do not conclusively demonstrate that the null…

A: The probability value is the probability of a result as extreme or more extreme given that the null…

Q: Is the following a non-directional (two tailed) or directional (one tailed) hypothesis?  Students…

A: Given : Claim : Students who sit in the front of the class have a different average grade compared…

Q: Which of the following hypotheses will require a two-tailed test? Women are more concerned with the…

A: Sol:- Two tailed test Hypothesis can be modeled as :-H0: μ = μ0Ha: μ ≠ μ0 Correct choice :-

Q: A researcher evaluates a treatment effect using a two-tailed hypothesis with α = .05 and the…

A: Rejection rule: Reject the null hypothesis if p-value is less than the level of significance.

Q: In which situations should a researcher use a chi-square test instead of a correlation or t-test to…

A: Answer is explained below

Q: The mean repair bill of cars is greater than $110. A) Write the null and alternative hypotheses. B)…

A: In this question, we have a given statement, using that statement we have to find the null and…

Q: A recent newspaper article claimed that more people read Magazine A than read Magazine B. To test…

A: the Null Hypothesis is H0:μA−μB=0 The alternative hypothesis is Ha:μA−μB>0

Q: Country Financial, a financial services company, uses surveys of adults age 18 and older todetermine…

A:

Q: In general, if sample data are such that the null hypothesis is rejected at the α = 1% level of…

A: Rejection rule:

Q: In the absence of compelling reasons for a one-tailed test, which test must be used?

A:

Q: Be able to state the null hypothesis for both one-tailed and two-tailed tests?

A:

Q: A researcher selects a sample from a population with a mean of 50 and administers a treatment to the…

A: Given : A researcher selects a sample from a population with a mean of 50 and administers a…

Q: The mean age of lawyers in New York is 50.7 years. A) Null and alternative hypotheses B) Indicate…

A: It is claimed that the mean age of lawyers in New York is 50.7 years.A)To test whether the above…

Q: Country Financial, a financial services company, uses surveys of adults age 18 and older todetermine…

A:

Q: If your null and alternative hypothesis are: H0:p1=p2 H1:p1≠p2 Then the test is:…

A: Null Hypothesis contain 'less than or equal to ( ≤ )' , 'greater than or equal to ( ≥ )' or 'equal…

Q: An elementary school claims the mean score on the district reading test of its fourth grade students…

A: Given Information:  An elementary school claims the mean score on the district reading test of its…

Q: Four drug companies are studying the effect of their new drugs. In its clinical trials, company A…

A: Given: Four drug companies are studying the effect of their new drugs. In their clinical trials:…

Q: Which of the following statements comparing one-tailed with two-tailed hypothesis tests is correct?…

A: Statement a: Correct.                       Let α be the level of significance,    Then, the…

Q: Suppose a researcher wanted to conduct a study to determine if there was a statistically significant…

A: A one-tailed test is a hypothesis test that tests if the mean population is less than or more than…

Q: Amelia is looking for a birthday gift for her best friend. Since her best friend loves to buy trendy…

A: Given information: 1)  The value that appears most often in the data set is called mode of the…

Q: The owner of a professional basketball team claims that the mean attendance at games is over 17,000…

A: As the direction is specified we easily can find the type of hypothesis.

Q: If you use a 0.05 level of significance in a two-tail hypothesis test, what decision will you make…

A: Alpha = 0.05 Two tailed test Zstat = 1.2

Q: When might we want to test a non-directional (two-tailed) hypothesis, as opposed to a one-tailed…

A: If we want to test if the population parameter is more than a particular value or variable we use a…

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

A: Null hypothesis is the statement of the no difference whereas the alternative hypothesis states the…

Q: A coin-operated drink machine was designed to discharge a mean of 7 ounces of coffee per cup.…

A:

Q: The president of a university claims that the mean attendance at football games is less than 50,000…

A: Here we need to choose from the correct option. The claim is that the mean attendence at football…

Q: A dentist hypothesizes that the average time a child spends brushing their teeth is less than 60% of…

A: In the given situation, the claim of the problem is "the average time a child spends brushing their…

Q: A researcher hypothesizes that the average student spends less than 30%  of their total study time…

A: Given Information: A researcher hypothesizes that the average student spends less than 30%  of their…

Q: how should a decision that fails to reject the null hypothesis be​ interpreted?

A: The dean of a major university claims that the mean number of hours students study at her…

Q: A researcher thinks that the mean starting salary for San Jose State University graduates is under…

A: Claim: The mean starting salary for San Jose State University graduates is under $100,000 per year…

Q: A local dermatologist claims that more than 30% of mole biopsies are unnecessary. Last month at his…

A: The given claim of the test is more than 30% of mole biopsies are unnecessary.

Q: Suppose you are asked to conduct a two-tailed hypothesis test on the population mean. What type of…

A: Here we want to conduct two tailed hypothesis test for mean

Q: The appropriate null hypothesis for a two-tailed, independent samples t-test is  ____________.

A: We have to find Ho.

Q: An elementary school claims that the variation in reading score of its fourth grade students is less…

A: Given,claim: the variation in reading score of its fourthgrade students is less than some value.

Q: A medical billing specialist claims that the proportion of ER patients who do not have health…

A:

Q: An elementary school claims that the variation in reading score of its fourth grade students is less…

A: we have given that : An elementary school claims that variation in reading score of its fourth grade…

Q: Country Financial, a financial services company, uses surveys of adults age 18 and older todetermine…

A: a. In a survey, 410 out of 1,000 adults indicated that their financial security was more than fair…

Q: A soda company claims that the mean amount of soda in their bottles is 12 ounces. Determine whether…

A: Given,   A soda company claims that the mean amount of soda in their bottles is 12 ounces.   The…

Q: A brewery claims that the mean amount of beer in their bottles is at least 12 ounces. Determine…

A:

Q: A researcher conducts a study measuring 15 children before and after they attend a math intervention…

A:

Q: In 2000, the mean math SAT score for students at one school was 472. Five years later, in 2005, a…

A:

Q: Country Financial, a financial services company, uses surveys of adults age 18 and older todetermine…

A:

Q: A researcher selects a sample from a population with a mean of 50 and administers a treatment to the…

A: The given sample mean is 49. After the treatment is administered, the scores are expected to…

Q: Past studies have indicated that the percentage of smokers is estimated to be about 35%. Given the…

A: Given : Claim : The percentage of smokers has reduced.

Q: In what way is heuristics linked to hypotheses?

A: Heuristic hypothesis is the temporary prediction of unknown which is made to simplify the solution…

Q: An elementary school claims the variation in reading scores of its fourth grade 3. 25. Determine…

A: There are two types of hypothesis. 1. One-tailed test2. Two tailed-test One tailed can be further…