Which of the following terms describes when the null hypothesis is NOT rejected when it should be rejected? O Significance level, a
Q: For several years, evidence had been mounting that folic acid reduces major birth defects. In a…
A: Introduction: Denote p1, p2 as the true proportions of women who gave birth to children with major…
Q: What specifically is used to decide whether to reject or fail to reject the null hypothesis? To…
A: Level of signicance is the pre-assigned value.
Q: A random sample of 25 students were asked to self-identify as "statistics-lovers" or…
A: Denote μ1, μ2 as the population mean number of students who “love” statistics and who “adore”…
Q: DIRECTIONS: Identify the appropriate hypothesis test for each of the following research situations…
A: a) researcher wants to check whether is there is significant difference in people who sleep 4 hours…
Q: The P-value for a hypothesis test is shown. Use the P-value to decide whether to reject Ho when the…
A:
Q: A genetic experiment involving peas yielded one sample of offspring consisting of 411 green peas and…
A:
Q: Test the claim that the mean GPA of night students is larger than 2.1 at the 0.005 significance…
A: Solution:- Given: μ0=2.1,x¯=2.11,n=50,s=0.06,α=0.005 and d.f.=n-1=50-1=49 To find, (1) Hypothesis…
Q: ich of the following relates to the acceptance of the null hypothesis when it is actually true? 1.…
A: In hypothesis testing, a type I error occurs when the null hypothesis (Ho) is rejected when it is…
Q: What is meant when we say that a hypothesis test is a. exact?b. approximately correct?
A:
Q: The P-value for a hypothesis test is shown. Use the P-value to decide whether to reject Ho when the…
A: p-value = 0.0966
Q: Y, = Po+P,X1+P2X2+ u ch of the following describes how to test the null hypotheses that either B, =…
A: The multiple regression equation is, Here is the slope are the slopes of the regression…
Q: James is a school psychologist who wants to implement stress coping skills to help his students. His…
A: Here the direction of the test is to the left.
Q: You are conducting a study to see if the proportion of voters who prefer candidate A is…
A: Solution: Let X be the number of potential voters prefer candidate A and n be the sample number of…
Q: D. There is not sufficient evidence to warrant rejection of the claim that whether a subject lies…
A:
Q: Which of the following statement(s) is/are true? If the (x) is more than the p-value, there is…
A: If the p-value is greater than alpha, you accept the null hypothesis. If p-value is less than alpha,…
Q: Which one of the following is the characteristic of inference that cannot be legitimately drawn from…
A: From the provided options, the appropriate option, that can not be inferred from the experimental…
Q: In a study conducted to investigate browsing activity by shoppers, each shopper was initially…
A:
Q: A genetic experiment involving peas yielded one sample of offspring consisting of 439 green peas and…
A: Given DataTotal peas(n) = green peas + yellow peas = 439 + 160 = 599
Q: e the null and alternative hypotheses for the proposed hypothesis test. A researcher is interested…
A: Hypothesis testing Hypothesis testing is conducted for the parameters of the population like…
Q: In testing hypotheses, if the consequences of failing to reject a null hypothesis that is actually…
A: Here, if the consequences of failing to reject a null hypothesis that is actually false are very…
Q: Which of the following statements is/are true about one-sided and two-sided hypothesis tests?…
A: (1) one-sided tests can have lower power than two-sided tests, FALSE because the two-sided test is…
Q: The proportion of people in Los Angeles who like exercising is 52%. Identify the type I and type II…
A: The type I error is defined as rejecting the null hypothesis when actually it is true. The type II…
Q: In 2002, the General Social Survey conducted by StatsSA, participants was asked the following…
A: Test is that whether there is a relationship between death penalty and marjuana beliefs.
Q: A genetic experiment involving peas yielded one sample of offspring consisting of 442 green peas and…
A: It is given that a sample of offspring consisting of 442 green peas in which 142 are yellow peas.
Q: If a null hypothesis is rejected at the 0.05 level of significance, it must be rejected at the 0.01…
A: Statement: " If a null hypothesis is rejected at the 0.05 level of significance, it must be rejected…
Q: You want to buy a washing machine, and a salesperson tells you that the mean repair costs for Model…
A:
Q: The p-value of a hypothesis test is" a. the smallest significance level at which the null…
A: If p value <= alpha we reject Ho. If p value > alpha we fail to reject Ho.
Q: Test the claim that the mean GPA of night students is larger than 2.7 at the 0.01 significance…
A: Given data : n =25 x̄ = 2.7 s= 0.05 μ= 2.7 α= 0.01
Q: Which level of significance makes it easier to reject the null hypothesis, and why does the level of…
A: We have given that the statement about to the significance level that makes it easier to reject the…
Q: When one changes the significance level of a hypothesis test from 0.10 to 0.05, which of the…
A: It was stated that the significance level of a hypothesis test changed from 0.10 to 0.05. Need to…
Q: With a = .01, complete step 4 of the hypothesis testing procedure. What decision should the…
A: From the above question The independent variable X is Chocolate eaten during week And The dependent…
Q: If you reject the null hypothesis at the 5% significance level, would you reject it at the 7% level?
A: It is given that we reject the null hypothesis at 5% significance level.
Q: Suppose that for a particular hypothesis test, the consequences of a Type I error are very serious.…
A: Here given that for a particular hypothesis test, the consequence of a Type I error are very…
Q: The P-value for a hypothesis test is shown. Use the P-value to decide whether to reject Ho when the…
A: Solution-: Given: p-value=0.0067 Use p-value to decide whether to reject H0 When the level of…
Q: The Department of Health and Welfare in Pulaski County is reviewing charges for a common surgical…
A: a. Null Hypothesis: H0: There is no difference in the means among the three hospitals. Alternative…
Q: Does buying CDs depend on whether you own a smartphone or not? A survey asks a group of students if…
A: (a)The null and alternative hypotheses are:H0: The two variables are independent, so owning a…
Q: Which of the following statements are TRUE? I. Increasing the significance level of a test will…
A: Type I Error:A Type I error occurs when a statistical test incorrectly rejects a true null…
Q: Q4. Which of these statements are correct for a hypothesis test: I. The Significance Level is the…
A:
Step by step
Solved in 3 steps with 5 images
- Suppose that a hypothesis test is performed at a small significance level. State the appropriate conclusion in each case by referring to Key Fact 2. a. The null hypothesis is rejected.b. The null hypothesis is not rejected.Which one of the following statements about the Type I error of hypothesis testing is wrong? a.It means that we may reject the null hypothesis H0 when H0 is actually true. b.It is closely related to the significance level of the test. c.Researchers can control the probability of Type I error. d.It means that we may fail to reject the null hypothesis H0 when H1 is true.6
- n a study of 817 randomly selected medical malpractice lawsuits, it was found that 484 of them were dropped or dismissed. Use a 0.05 significance level to test the claim that most medical malpractice lawsuits are dropped or dismissed. Which of the following is the hypothesis test to be conducted? A. Upper H 0 : p less than 0.5 Upper H 1 : p equals 0.5 B. Upper H 0 : p equals 0.5 Upper H 1 : p greater than 0.5 Your answer is correct. C. Upper H 0 : p equals 0.5 Upper H 1 : p less than 0.5 D. Upper H 0 : p equals 0.5 Upper H 1 : p not equals 0.5 E. Upper H 0 : p not equals 0.5 Upper H 1 : p equals 0.5 F. Upper H 0 : p greater than 0.5 Upper H 1 : p equals 0.5 What is the test statistic? z = p-value = conclusionIn a study of 819 randomly selected medical malpractice lawsuits, it was found that 473 of them were dropped or dismissed. Use a 0.01 significance level to test the claim that most medical malpractice lawsuits are dropped or dismissed. Which of the following is the hypothesis test to be conducted? ОА. Но: р30.5 H;: p> 0.5 ОС. Но: р0.5 H1: p= 0.5 OF. Ho: p= 0.5 ОЕ. Но: р-0.5 H1: p#0.5 H1: p<0.5 What is the test statistic? (Round to two decimal places as needed.) What is the P-value? P-value = (Round to three decimal places as needed.)The data below show sport preference and age of participant from a random sample of members of a sports club. Is there evidence to suggest that they are related? Frequencies of Sport Preference and Age Tennis Swimming Basketball 18-25 97 86 72 26-30 91 78 54 31-40 68 72 50 Over 40 67 58 43 What can be concluded at the a = 0.10 significance level?
- The P-value for a hypothesis test is shown. Use the P-value to decide whether to reject Ho when the level of significance is (a) a = 0.01, (b) a = 0.05, and (c) a = 0.10. P=0.1162 (a) Do you reject or fail to reject H, at the 0.01 level of significance? O A. Reject H, because the P-value, 0.1162, is greater than a = 0.01. O B. Reject H, because the P-value, 0.1162, is less than a= 0.01. O C. Fail to reject Ho because the P-value, 0.1162, is less than a= 0.01. O D. Fail to reject H, because the P-value, 0.1162, is greater than a = 0.01. (b) Do you reject or fail to reject H, at the 0.05 level of significance? O A. Fail to reject H, because the P-value, 0.1162, is less than a = 0.05. O B. Reject Họ because the P-value, 0.1162, is greater than a = 0.05. O C. Fail to reject Ho because the P-value, 0.1162, is greater than a = 0.05. O D. Reject H, because the P-value, 0.1162, is less than oa = 0.05. (c) Do you reject or fail to reject Ho at the 0.10 level of significance? O A. Reject H,…For a hypothesis test, if the p-value for the test statistic is less than the significance level, which one of the following is a correct conclusion? Group of answer choices Reject the null hypothesis. There is enough evidence to conclude the alternative hypothesis is true. Fail to reject the null hypothesis. There is enough evidence to conclude the null hypothesis is true. Reject the null hypothesis. There is not enough evidence to conclude the alternative hypothesis is true. Fail to reject the null hypothesis. There is not enough evidence to conclude the alternative hypothesis is true.The P-value for a hypothesis test is shown. Use the P-value to decide whether to reject H, when the level of significance is (a) a = 0.01, (b) a = 0.05, and (c) a = 0.10. P=0.0212 (a) Do you reject or fail to reject H, at the 0.01 level of significance? O A. Fail to reject H, because the P-value, 0.0212, is greater than a= 0.01. O B. Reject H, because the P-value, 0.0212, is greater than a = 0.01. OC. Reject H, because the P-value, 0.0212, is less than a = 0.01. O D. Fail to reject H, because the P-value, 0.0212, is less than a = 0.01. (b) Do you reject or fail to reject H, at the 0.05 level of significance? O A. Fail to reject H, because the P-value, 0.0212, is greater than a= 0.05. O B. Reject H, because the P-value, 0.0212, is greater than a = 0.05. OC. Fail to reject H, because the P-value, 0.0212, is less than a = 0.05. O D. Reject H, because the P-value, 0.0212, is less than a = 0.05. (c) Do you reject or fail to reject H, at the 0.10 level of significance? O A. Reject H, because…
- In a(n) ________ test, the null hypothesis should be rejected when the test value is in either of the two critical regions. Explain.You receive a brochure from a large university. The brochure indicates that the mean class size for full-time faculty is fewer than 31 students. You want to test this claim, You randomly select 18 classes taught by full-time faculty and determine the class size of each. The results are shown in the table below, At a = 0.01. can vou support the university's claim? Complete parts (a) through (d) below. Assume the population is normally distributed. 32 26 27 30 31 37 23 28 320 29 27 37 32 31 25 31 29 22 (a) Write the claim mathematically and identify Ho and Ha. Which of the following correctly states Ho and Ha? O C. Ho: H=31 O A. Ho: H> 31 Hai H531 O B. Ho: H231 Ha:H31 (b) Use technology to find the P-value. P= (Round to three decimal places as needed.) (c) Decide whether to reject or fail to reject the null hypothesis. Which of the following is correct? O A. Fail to reject Ho because the P-value is less than the significance level. O B. Reject H because the P-value is less than the…According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft, 23% of all complaints in 2007 were for identity theft. In that year, Alaska had 321 complaints of identity theft out of 1,432 consumer complaints ("Consumer fraud and," 2008). Does this data provide enough evidence to show that Alaska had a lower proportion of identity theft than 23%? Test at the 5% level. (i) Which of the following statements correctly defines the null hypothesis HO? A. μ = 321 B. p < 0.23 C. p = 0.23 D. μ < 321 Enter letter corresponding to correct answer (ii) Which of the following statements correctly defines the alternative hypothesis HA? A. μ = 321 B. p < 0.23 C. p = 0.23 D. μ < 321 Enter letter corresponding to correct answer (iii) Enter the level of significance α used for this test: Enter in decimal form. Examples of correctly entered answers: 0.01 0.02 0.05 0.10 (iv) Determine pˆiv Determine p^ Enter…