4) Which of the following sets of measures of association represent the values of the null hypoth (note: RD = Risk Difference which is synonymous with Attributable Risk) a) RD>0, RR>1, OR>1 b) RD=0, RR=1, OR=1 c) RD#0, RR#0, OR#0 d) RD#1, RR#1, OR#1 e) None of the above
Q: 9) It is claimed that the proportion of households that are very satisfied from the house they are…
A: One sample proportion z test: One sample proportion z test is used to determine the significance…
Q: Test the claim that the mean GPA of night students is larger than 3.5 at the 0.005 significance…
A: claim : The mean GPA of night students is larger than 3.5, i.e. μ > 3.5 Hypothesis : H0 : μ ≤3.5…
Q: Persons who visit the restroom of a certain fast-food outlet were asked to state their opinion of…
A: The given contingency table is gender totals Quality of facilities males females above…
Q: 2) Random sample of 11 male high school students and 12 female high school students are selected…
A: Males : N1 = 11 df1 = 11 - 1 = 10 Mean ( M1 = 560 ) Standard deviation ( S1 = 133.1) Females :…
Q: Suppose 221 subjects are treated with a drug that is used to treat pain and 53 of them developed…
A:
Q: Identify the null and alternative hypotheses for this test. Choose the correct answer below.
A: Here Given Sample size=n=212 X=54 Claim-More than 20 % of user develop nausea.
Q: Suppose 212 subjects are treated with a drug that is used to treat pain and 52 of them developed…
A: Correct answer: Option (B)
Q: P-value .011, a = .01 %3D Reject O Fail to reject
A: In hypothesis testing using p-value or using the critical value we decide whether we have to reject…
Q: Suppose 204 subjects are treated with a drug that is used to treat pain and 53 of them developed…
A: 204 subjects are treated with a drug that is used to treat pain and 53 of them developed…
Q: Suppose 204 subjects are treated with a drug that is used to treat pain and 55 of them developed…
A:
Q: Wilens and colleagues (2008) studied the association between bipolar disorder and substance abuse.…
A: We are given the following confidence intervals and are asked to answer the following questions…
Q: 1. A retail store receives an average of 5.9 return per day. For a sample of 7 days, it received the…
A: Given Information: A store receives an average of 5.9 return per day. Sample size n=7 Sample data is…
Q: if a hypothesis is not rejected at the 0.10 significance level, it A. Must be rejected at the…
A:
Q: 3. Here are the observed frequencies from four categories: 5, 6, 8, 13. Assume we want to use a 0.05…
A: a) Null Hypothesis H0: The four categories are equally likely Alternate Hypothesis HA: The four…
Q: 7 53% myopenmath.com Test the claim that the proportion of men who own cats is smaller than 70% at…
A: Given in the question, the proportion of men who own cats is smaller than 70%.
Q: Past studies have indicated that the percentage of smokers was estimated to be about 30%. Given the…
A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…
Q: Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. H,…
A:
Q: A used car dealer claims that the median cost of a used car is $12,000. In a random sample of 15…
A: Given median cost of a used car = $12000Total number of used cars in sample = n = 15Total number of…
Q: A forensic psychologist is interested in assessing the prevalence of major depressive disorders…
A:
Q: List the four assumptions for the two-way (or factorial) ANOVA.
A: The required four assumption for two-way ANOVA as follows;
Q: Assume that matched pairs of data from a poll of Internet users who were asked if they make travel…
A: Assume that matched pairs of data from a poll of Internet users who were asked if they make travel…
Q: A case-control (or retrospective) study was conducted to investigate a relationship between the…
A: The question is about Chi-Square test for Independence. There are 2 variables. Those are Injuries…
Q: Let Q1 represent the first quartile, Q2 represent the second quartile (or median), and Q3 represent…
A: Quartiles: It is the group of values or means that divide a data set into quarters or groups of…
Q: A health organization asserts that the prevalence of smoking among male adults 18 years or older in…
A: The test hypotheses are: Null hypothesis: H0: p1 = p2 Alternative hypothesis: Ha: p1 > p2. Test…
Q: Listed below are attribute ratings of males by females who participated in speed dating events. Use…
A:
Q: the proportion of wildfires caused by humans in the south different from the proportion of wildfires…
A: We have given that Sample sizes n1= 519 ,n2= 500 Favorable cases x1= 350 , x2= 383
Q: 3) Test at 0.05 significance level if the average age of female respondents is less than that of…
A: Given information: Female Male Mean 47.15625 44.16667 Sum 1509 795 S.D 14.14922 19.87979…
Q: A concerned group of citizens wanted to know if the proportion of armed robberies in Texas was…
A: It is required to test whether the proportion of armed robberies in the state in 2011 was different…
Q: A study of all 2093 employees of a company shows that 54% are satisfied with the company's health…
A: Definition Statistic: Statistic may be defined as which one is based on the sample Parameter:…
Q: Past studies have indicated that the percentage of smokers was estimated to be about 35%. Given the…
A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: A sample of 2010 adults were asked in 1990 whether they smoked (yes or no). This same sample was…
A: The appropriate test is chi-square test. Decision Rule: If test statistic is larger than critical…
Q: sion based on the ANOVA tab
A: To find the overall mean of the chlorine level across all the pools measured, we can calculate the…
Q: To test the fairness of law enforcement in its area, a local citizens’ group wants to know whether…
A: Given Information: Ticketed Not Ticketed Men 35 144 Women 22 199
Q: Cincinnati Paint Company sells quality brands of paints through hardware stores throughout the…
A: SUMMARY OUTPUT Regression Statistics Multiple…
Q: Conduct a statistical test to examine whether achievement attitudes are associated with different…
A: The number of rows is 3 and the number of columns is 2.
Q: In a certain school district, it was observed that 29% of the students in the element schools were…
A: Determine the hypothesized population proportion for the given test. The hypothesized population…
Q: The table to the right includes results from polygraph experiments. In each case, it was known if…
A: For the given data, we need to test whether a subject lies is independent of the polygraph test…
Q: Suppose 226 subjects are treated with a drug that is used to treat pain and 54 of them developed…
A: Given Information: Sample size n=226 users x=54 of them developed nausea. Significance level α=0.10…
Q: the normal approximation for the binomial distribution (without the continuity correction), what is…
A: Given that Sample size n =373 Favorable cases x =131 Sample proportion p^=x/n =131/373 =0.3512
Q: In a certain school district, it was observed that 27% of the students in the element schools were…
A: Introduction: Consider that p is the true proportion of only children among the children in the…
Q: Suppose 231 subjects are treated with a drug that is used to treat pain and 51 of them developed…
A: From the provided information,Sample size (n) = 231From which 51 developed nausea, sample proportion…
Q: A study was conducted to determine the proportion of people who dream in black and white instead of…
A: The random variable X follows binomial distribution. We have to use normal approximation to binomial…
Q: To test the fairness of law enforcement in its area, a local citizens’ group wants to know whether…
A:
Q: Suppose 224 subjects are treated with a drug that is used to treat pain and 53 of them developed…
A: The objective of this question is to test a claim about a population proportion using a sample…
Q: The accompanying data on degree of spirituality for a sample of natural scientists and a sample of…
A:
Step by step
Solved in 2 steps
- I need this ASAP, please.1.) After conducting a clinical trial to assess the effect of pharmaceutical eye drops (Eyezican) on glaucoma, researchers found an RR of 2.7 (95% CI, 0.1-4.4). The true association between the drops and glaucoma is actually RR = 1.3. a. Discuss the results in the context of precision, validity, strength of association, and statistical significance (4-5 sentences). b. Describe one element in the study that could be changed by researchers to increase precision.3. If the owner of a gasoline station wants to study gasoline purchasing habits by motorists at his station. A random sample of 30 motorists during a certain week is selected, with the following results:Amount purchased ? = 11.3 gallons, s = 3.1 gallons10 motorists purchased premium grade gasolineAt the 0.10 level of significance, is there evidence that the mean purchase is different from 10 gallons?At the 0.10 level of significance, is there evidence that fewer than 40% of the motorists purchase premium grade gasoline?
- Suppose 247 subjects are treated with a drug that is used to treat pain and 52 of them developed nausea. Use a 0.10 significance level to test the claim that more than 20% of users develop nausea. Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. Ho: p=0.20 H₁: p=0.20. O B. Ho: p=0.20 H₁: p0.20 H₁: p=0.20 O D. Ho: p=0.20 H₁: p > 0.20 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is (Round to two decimal places as needed.) Identify the P-value for this hypothesis test. The P-value for this hypothesis test is. (Round to three decimal places as needed.) Identify the conclusion for this hypothesis test. O A. Reject Ho. There is not sufficient evidence to warrant support of the claim that more than 20% of users develop nausea. O B. Fail to reject Ho. There is sufficient evidence to warrant support of the claim that more than 20% of users develop nausea. O C. Fail to reject Ho. There is not…Researchers are interested in whether rearing conditions lead to aggression in laboratory animals. The animals were randomly assigned to be reared under three different conditions. The following table shows the aggression scores for each animal. Does the mean aggression score differ for the three groups? Use a 5% level of significance. 1) the appropriate null and alternative hypotheses; 2) the appropriate test; 3) the decision rule; 4) the calculation of the test statistic; and 5) your conclusion including a comparison to alpha or the critical value. Rearing Condition Extremely Crowded Moderately Crowded Not Crowded 30 20 10 30 10 10 30 15 20 25…A real estate software program gives the estimated values of homes and lists characteristics of the homes. A prospective home buyer used the program to collect a sample of twenty-five homes and recorded the estimated value of the homes and how many bathrooms they contain. The prospective home buyer wants to investigate whether there is an association between the number of bathrooms a home contains and the estimated value of the home. Assuming all conditions for inference are met, which of the following significance tests should be used for the investigation? A two-sample z-test for a difference between proportions A A linear regression t-test for slope B A matched pairs t-test for a mean difference C A two-sample t-test for a difference between means D A chi-square test of independence E
- if a researcher concludes that cereal color has no effect on amount consumed but the researcher was wrong in this conclusion which of the following best represents his decision? correct decision, type 1 error, type 2 error, or type 3 errorA recent report from the Pew Research Center indicates that even teens think they have a problem being too attached to their phones. A total of 365 teenage girls and 378 teenage boys were surveyed. Of the teenage girls surveyed, 171 reported feeling too attached to their phone. Of the teenage boys surveyed, 132 reported feeling too attached to their phone. Is there convincing statistical evidence of a difference between the two population proportions at the significance level of 0.01? (A) Yes, because the sample proportions are different. (B) Yes, because the p-value is less than 0.01. (C) Yes, because the p-value is greater than 0.01. (D) No, because the p-value is less than 0.01. (E) No, because the p-value is greater than 0.01.Past studies have indicated that the percentage of smokers was estimated to be about 30%. Given the new smoking cessation programs that have been implemented, you now believe that the percentage of smokers has reduced. You randomly surveyed 1775 people and found that 492 smoke. Use a 0.05 significance level to test the claim that the percentage of smokers has reduced. a) Identify the null and alternative hypotheses? Ho: ? v Ha: ? v b) What type of hypothesis test should you conduct (left-, right-, or two-tailed))? O left-tailed O right-tailed O two-tailed c) Identify the appropriate significance level. Submit Question % & 8. 5.
- 7. Is there a relationship between gender and the type of car driven? A random sample of 1000 adults was obtained. The subjects sampled were asked their gender and what type of car they drive given choices: car, truck, or SUV. Of the females sampled, 210 drive a car, 110 drive a truck, and 180 drive a SUV. Of the males sampled, 175 drive a car, 140 drive a truck, and 185 drive a SUV. At the 5% significance level what conclusion can be reached? Would your decision change at the 2.5% significance level? prk oubu buogncs br bolk A 102 4 c htoA study was conducted to determine the proportion of people who dream in black and white instead of color. Among 297 people over the age of 55, 75 dream in black and white, and among 310 people under the age of 25, 19 dream in black and white. Use a 0.05 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below. a. Identify the test statistic. z= 6.51 (Round to two decimal places as needed.) Identify the P-value. P-value = 3.770o (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? The P-value is greater than the significance level of a = 0.05, so fail to reject the null hypothesis. There is insufficient evidence to support the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. b. Test the claim by constructing an appropriate confidence…3. Discuss the basic procedure in making inferences on two samples and give a situation where you can apply it.