5. Suppose you are testing Но: д —D 75 Ні: д > 75 versus where o? is known and n = 50. From your data, you calculate your test statistic value as +2.01. (a) Should you use z or t when finding a p-value for this scenario? (b) Calculate the p-value for this scenario. (c) Using a significance level of 0.027. what decision should you make (Reject Ho or Do Not Reject Ho)?
Q: A poll asked 946 adults "If purchasing a used car made certain upgrades or features more…
A: As per guidelines we will solve the first question only, please repost other questions for more…
Q: Null and alternative hypothesis (give both in symbolic form and sentence form): Test statistic and…
A: Given that A researcher wishes to see whether the blood pressure of vegetarians is, onaverage,…
Q: Suppose the p-value for a two-tailed test equals 0.0463 and the level of significance equals 2.5%.…
A: If p-value > significance level, then the we fail to reject null Hypothesis If p-value <…
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: Suppose 450 subjects are treated with a drug that is used to treat pain and 140 of them developed…
A: The sample size, n is 450 and the number of patients who have developed nausea is 140. The sample…
Q: Suppose you carry out a significance test of H0: μ = 8 versus Ha: μ > 8 based on sample size n = 25…
A: Given that µ = 8 n = 25 df = n-1 = 25-1= 24
Q: 2. A soda company distributes diet cola in bottles label 32 oz. The Department of Trade and Industry…
A: 2. A soda company distributes diet cola in bottles label 32 oz. The Department of Trade and Industry…
Q: The mean salary of federal government employees on the general schedule is $59,593. The average…
A: Following are the explanation of the question. Use the one sample t test
Q: Historically, 15% of all Americans claim to have seen a UFO. A paranormal researcher claims that…
A: Consider that p is the true proportion of Americans, who claimed to have seen a UFO.
Q: Mathew believes that Power Physics will increase the players’ creativity, but doesn’t think that…
A:
Q: 2. At the 5% significance level, can you conclude that the mean nighttime viewing distance is…
A: We have used the excel data analysis tool to run the two-way ANOVA.
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: in the study, 368 babies were born, and 210 of them were girls. Use the sample data with a 0.01…
A: Null Hypothesis: H0: The probability of a baby being a girl is not greater than 0.05. Alternative…
Q: 4. For migraine sufferers, is there an association between gender and relief from a migraine with a…
A: Given: α=0.01
Q: A large fishing farm with thousands of fish has been treating its fish to stop a spreading fungal…
A:
Q: Suppose a researcher wants to estimate the population proportion of defective light bulbs. He took a…
A: From the provided information, Population proportion (p) = 0.07 The hypotheses can be constructed…
Q: To test the claim that American quarters are biased towards heads, suppose you flip an American…
A: Decision rule using p-value: Reject H0 at significance level α, if p-value ≤ α. Otherwise, fail to…
Q: The mean salary of federal government employees on the General Schedule is $59,593. The average…
A:
Q: Are Republicans more likely than Democrats to display the American flag in front of their residence…
A: Given Information: Republicans: Sample size (n1) = 679 Out of which x1 = 448 displayed the flag on…
Q: Are blonde female college students less likely to have boyfriends than brunette female college…
A:
Q: In a survey of families in which both parents work, one of the questions asked was, "Have you…
A: Given Information: Sample size of men (n1) = 200 Sample size of women (n2) = 200 Proportion of men…
Q: In a random sample of n1 = 162 males, there are x1 = 63 people that have blue eyes. In a random…
A: State the hypotheses. Let p1 denotes the percent of males with blue eyes Let p2 denotes the percent…
Q: Suppose a random sample of 150 universities is used to test the null hypothesis that the average…
A: The smallest significance level is obtained Excel function “=NORMSDIST(z)”.
Q: The test statistic in a left-tailed test is z=1.79. Determine the P-value and decide whether, at…
A: Given : The test statistic in a left-tailed test is z=1.79.
Q: The null and alternative hypotheses would be: Select an answer p1 μ1 Select an answer ≠ =…
A: It is claimed that, freshmen psychology majors more likely to change their major before they…
Q: 1. A sample of 800 items produced on a new machine showed that 48 of them are defective. The factory…
A: We have given that the information in a 5 different problems of population proportion z-test.…
Q: Scientists at a pharmaceutical company want to compare their new drug to an existing one. Let's call…
A: From the given information, the claim of the problem is ‘new drug reduces severe side effects in…
Q: In a one-tail hypothesis test where you reject H0 only in the upper tail, what is the p-value if…
A: Given : ZSTAT = +2.00
Q: Is it commonly believed that the mean body temperature of a healthy adult is 98.6f you are not…
A: Solution: From the given information, the claim is that the mean body temperature of a healthy adult…
Q: In a previous Paul, 44% of adults with children under the age of 18 reported that their family ate…
A: 44% of the adults with children under the age of 18 reported that their family ate dinner together…
Q: Suppose 233 subjects are treated with a drug that is used to treat pain and 51 of them developed…
A:
Q: According to a survey conducted by the Association for Dressings and Sauces, 20% of American adults…
A: Given: A survey is conducted by the Association for Dressings and Sauces. Let n denote the sample…
Q: If a researcher obtained a P-value of 0.01 for a hypothesis test that has a significance level of…
A: The P-value is 0.01.
Q: Suppose that you want to do statistical significance tests for four correlations, and you want your…
A: Given that there are four correlations. EWa(alpha) to be 0.05 Relation between EWa(alpha) and…
Q: The ages of actresses when they won an acting award is summarized by the statistics n=78, =35.6…
A:
Q: Suppose 214 subjects are treated with a drug that is used to treat pain and 55 of them developed…
A:
Q: 4. You set up a two-sided hypothesis test for a population mean µ with a null hypothesis of Ho : µ =…
A:
Q: car preference was related to city of birth. So, she polled 200 people who were born in either…
A: Solution To test hypothesis we will use chi square test.
Q: The test satistic of z=-2.81 is obtaines when testing the claim that p=2/3. a. Using a significance…
A:
Q: A recent study looked at the relationship between condom use and the spread of AIDS, by following…
A: (1)Here, the claim is that the proportions of partners who became infected with HIV are different…
Q: US Universities found that 72% of people are concerned about the possibility that their personal…
A:
Q: Suppose 230 subjects are treated with a drug that is used to treat pain and 52 of them developed…
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: 4. A new medication is being developed to treat severe nausea and vomiting among chemotherapy…
A: The sample size of data is 11 and the significance level is 0.05. The results have to be interpreted…
Q: Suppose 222 subjects are treated with a drug that is used to treat pain and 51 of them developed…
A: Given, The sample proportion is,
Q: each of the tests, what would be the conclusion if the test were carried out using the α = 0.05…
A: As the population S.D is known, w will use z test. The null and alternative hypotheses are, Ho: \mu…
Q: A psychologist is interested in people’s assessment of life happiness and how it relates to positive…
A:
Q: Suppose 244 subjects are treated with a drug that is used to treat pain and 53 of them developed…
A: We have, n= 244 = total number of subjects x= 53 = the number of subjects developed nausea p^ =…
Q: 2. In a certain special education school, a sample of 144 students was chosen and among these, 48…
A: Claim : proportion of ADHD students in the school is not 0.40.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- Is the proportion of wildfires caused by humans in the south different from the proportion of wildfires caused by humans in the west? 394 of the 533 randomly selected wildfires looked at in the south were caused by humans while 388 of the 554 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the = 0.01 level of significance? For this study, we should use Select an answer z-test for the difference between two population proportions t-test for the difference between two dependent population means z-test for a population proportion t-test for the difference between two independent population means t-test for a population mean The null and alternative hypotheses would be: Select an answer p1 μ1 Select an answer > ≠ < = Select an answer μ2 p2 (please enter a decimal) Select an answer p1 μ1 Select an answer > = < ≠ Select an answer p2 μ2 (Please enter a decimal) The test statistic ? z t = (please show your…Is the proportion of wildfires caused by humans in the south lower than the proportion of wildfires caused by humans in the west? 360 of the 501 randomly selected wildfires looked at in the south were caused by humans while 435 of the 588 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the = 0.10 level of significance? For this study, we should use Select an answer t-test for the difference between two dependent population means z-test for the difference between two population proportions t-test for a population mean t-test for the difference between two independent population means z-test for a population proportion The null and alternative hypotheses would be: Select an answer μ1 p1 Select an answer < ≠ > = Select an answer μ2 p2 (please enter a decimal) Select an answer μ1 p1 Select an answer > ≠ < = Select an answer p2 μ2 (Please enter a decimal) The test statistic ? z t = (please show your…My original question has already been answered, however, in Step 2 of the Expert Answer I would like clarification on how to compute the critical values manually - without the use of EXCEL, as mentioned in the respnse, so I need to know what formula do I use? Question: Prior to assessment of the outcome, the researchers did a manipulation check. Members of Groups 1 and 2 rated the attractiveness (on a 1 to 9 scale, with 9 being the most attractive) of the person in the photo. They reported that for the attractive photo, M = 7.53; for the unattractive photo, M = 3.20, F(1, 108) = 184.29. Was this difference statistically significant (using a = .05)? Expert Answer Step 1 It is given that the F-test statistic is 184.29, the degrees of freedom for first and second groups are 1 and 108, and the level of significance is 0.05. State the appropriate hypothesis: Null hypothesis: H0 : There is no difference between two groups. Alternative hypothesis: Ha : There is a difference between…
- . A taxi company has been using Brand A tires, and the distribution of kilometers to wear-out has been found to be approximately normal with mean =114,000 and σ = 11,600. Now it tries 12 tires of Brand B and finds a sample mean 117,200. Test at the 5% level of significance to see whether there is a significant difference (positive or negative) in kilometers to wear-out between Brand A and Brand B. In the problem above, if the true kilometers to wear-out is 114,000, what is the 95% confidence interval for sample means? First show how to get the critical z values.Suppose a statistician named Big Daddy thinks that the average monthly electric bill for Houston in August is more than $150. Using sample data from a normal population, Big Daddy obtains a test statistic of z = 1.06. Determine the P-value and state the conclusion at the 5% level of significance.A random sample of 170 donations at a certain blood bank reveals that 84 were Type A blood. Does this suggest that the actual percentage of Type A donations differs from 45%, of the population having Type A blood? A. State H0 and Ha B. Test the hypothesis using the P-Value approach at a significance level of 3%, and express your decision. C Based on the given data, determine the extreme value without rejecting the H0.
- Based on information from a large insurance company, 67% of all damage liability claims are made by single people under the age of 25. A random sample of 53 claims showed that 42 were made by single people under the age of 25. Does this indicate that the insurance claims of single people under the age of 25 is higher than the national percent reported by the large insurance company? Give the test statistic and your conclusion. a) z = 1.896; reject Ho at the 5% significance level b) z = -1.896; reject Ho at the 5% significance level c) z = 1.896; fail to reject Ho at the 5% significance level d) z = -1.396; fail to reject Ho at the 5% significance level e) z = 1.396; reject Ho at the 5% significance levelHistorically, the proportion of people who trade in their old car to a car dealer when purchasing a new car is 48%. Over the previous six months, in a sample of 115 new car buyers, 46 have traded in their old car. To determine (at the 10% level of significance) whether the proportion of new car buyers that trade in their old car has this is  statistically significantly decreased, what can you conclude concerning the null hypothesis? A) reject the null hypothesis Or B) fail to reject the null hypothesisSuppose IQ scores were obtained for 20 randomly selected sets of siblings. The 20 pairs of measurements yield (bar x) x=99.3, (bar y) y=99.5, r=0.943, P-value=0.000, and (^ over y) y=−5.29+1.06x, where x represents the IQ score of the younger child. Find the best-predicted value of (^ over y) y given that the younger child has an IQ of108?Use a significance level of 0.05. The critical values of the Pearson correlation coefficient r. Critical Values of the Pearson Correlation Coefficient r n α=0.05 α=0.01 NOTE: To test H0: ρ=0 against H1: ρ≠0, reject H0 if the absolute value of r is greater than the critical value in the table. 4 0.950 0.990 5 0.878 0.959 6 0.811 0.917 7 0.754 0.875 8 0.707 0.834 9 0.666 0.798 10 0.632 0.765 11 0.602 0.735 12 0.576 0.708 13 0.553 0.684 14 0.532 0.661 15 0.514 0.641 16 0.497 0.623 17 0.482 0.606 18 0.468 0.590…
- A random sample of 54 students from Cabrillo College are selected from a normal population with mu equal to 20 and sigma equal to 5. After a treatment is administered to the students, the researcher calculated the sample mean to be 21. Is there enough evidence to conclude that the treatment had an effect at the 5% significance level? If the z-statistic equals 1.46 and the critical values are -1.96 and 1.96, what conclusion can we make? (a)reject the null hypothesis and accept the alternative hypothesis (b)cannot determine (c)fail to reject the null hypothesis (d)fail to reject the alternative hypothesisYou are testing the null hypothesis that there is no linear relationship between two variables, X and Y. From your sample of n=18, you determine that b1=5.2 and Sb1=1.2. a. What is the value of tSTAT? b. At the α=0.05 level of significance, what are the critical values? c. Based on your answers to (a) and (b), what statistical decision should you make? d. Construct a 95% confidence interval estimate of the population slope, β1.What would you conclude based on an α=0.05 level? We reject the null hypothesis and do not accept the alternative hypothesis since there is sufficient evidence that the proportion of all vehicles that meet or exceed current fuel economy standards is greater than 90% due to the p-value being greater than the α level. Explain the results of your hypothesis test. What does the p-value signify? Would you say the observed outcome was unusual? If so, how unusual was the outcome?