85% of all restaurants fail after one year. Is that number different_for Chinese restaurants? Out of a random selection of 200 new Chinese restaurants, 175 had failed after one year. Use a 0.05 significance level to test your hypothesis. What is the Z obr? (round to the nearest whole number)
Q: In a random sample of 120 cheerleaders, 54 had suf-fered moderate to severe damage to their voices.…
A: For a 90% confidence level the z-critical value is 1.645 using the Excel formula “=NORM.S.INV…
Q: Range anxiety is one of the reasons consumers are reluctant to switch to an electric vehicle, and…
A: Given information: x 89 90 91.5 92 92.5 95 95.5 96 93 93.5 94 94 91…
Q: In a certain school district, it was observed that 28% of the students in the element schools were…
A: In the school district it has been observed that, 28% of the students in the element school were…
Q: In 1945, an organization asked 1439 randomly sampled American citizens, "Do you think we can develop…
A: Given that , Sample size, n =1439 Favorable cases, x =766 Sample proportion, p^ = xn=7661439=0.5323…
Q: In a study of 795 randomly selected medical malpractice lawsuits, it was found that 506 of them…
A: Given Data: p^=xn=506795=0.6365 n=795 p=0.5
Q: A coin was flipped 80 times and came up heads 45 times. At the .10 of significance, is the coin…
A: n = 80, x = 45, .10 of significance
Q: hypothesis. g. Thus, the final conclusion is that ... O The data suggest the populaton proportion is…
A: For the given data perform z test for one proportion
Q: A random sample of 400 Fresno State students revealed that 228 were female. Test the claim that more…
A: According to the provided information, a random sample of Fresno State students revealed that 228…
Q: A newspaper conducted a statewide survey concerning the 1998 race for state senator. The newspaper…
A:
Q: In a survey, 43% of the respondents stated that they talk to their pets on the telephone. A…
A: The question is about hypothesis testing.Given :Population proportion of respondents who talk to…
Q: An ornithologist is studying the length (in seconds) of bird calls. Random samplesfrom three…
A: Given: Level of significance (α) = 0.05 Here, it is required to check whether there is a difference…
Q: Using a T – Test, what is the degrees of freedom of a one sample mean test having a sample size of…
A: Answer - Using a T – Test, what is the degrees of freedom of a one sample mean…
Q: The mean score on a widely freshman history examination is 75. A history teacher at a very large…
A: Given : population mean(μ)=75 Xi=test scores Dataset:
Q: experiment, a man who exercised vigorously at least four times per week was considered "athletic."…
A: Let athletic men be the 1st sample and non-athletic men be the 2nd sample Hypotheses for the test…
Q: eople are randomly selected and the accuracy of their wristwatches is checked, with positive errors…
A: Given Population mean μ=0, sample mean x̄=102, n=sample size=50 , population standard deviations…
Q: In a survey, 36% of the respondents stated that they talk to their pets on the telephone. A…
A: Sample size(n)=240No.of persons spoke to their pets on the telephone (x)=85Population proportion(p0…
Q: In a survey, 36% of the respondents stated that they talk to their pets on the telephone. A…
A: Sample size(n)=240No.of persons spoke to their pets on the telephone (x)=85Population proportion(p0…
Q: A telephone company claims that more than 15% of its customers have at least two telephone lines.…
A:
Q: A university conducted a study of online adults that included 411 tablet owners. The study found…
A: Given info: A university conducted a study of online adults that included 411 tablet owners. The…
Q: You calculate that Ex = 110 and Ex2 = 1200. Perform the rest of the ANOVA calculations to determine…
A: It is given that Number of locations k = 3 Number of observations N = 11 Note : Since you have asked…
Q: A study of dog obedience training was completed. 40 dogs were trained using the K9 Complete Program.…
A: No , the likelihood found is by chance is 1 out of 1000 a) as choose the dog 1 out of 1000 then the…
Q: A random sample of n1 = 295 voters registered in the state of California showed that 141 voted in…
A: Note: Hi there! Thank you for posting the question. TO avoid the plagiarism issues, we have used the…
Q: A psychologist would like to know whether the 4 seasons have any consistent effect on Amazon…
A: We want to find the Missing value in the ANOVA table
Q: PLEASE DON'T UPLOAD A PICTURE OF THE ANSWER. PLEASE TYPE IT SO I CAN COPY AND PASTE IT INTO MY…
A: Chi-Squared Test for Independence : Hypothesis : H0 : There is a no relationship between gender and…
Q: A student wants to see if the number of times a book has been checked out of the tibrary in the past…
A: In this case the Number of times checked out (x) is the independent variable and the number of pages…
Q: A student wants to see if the number of times a book has been checked out of the library in the past…
A: As given, the" number of times checked out " will be a predictor of the " number of pages ".…
Q: Q3: A bank will open a new branch in a particular neighborhood if it can be reasonably sure that at…
A:
Q: What are the correct hypotheses? (Select the correct symbols and use decimal values not percentages.…
A: As per our guidelines, we are allowed to answer first three sub-parts only . Thanks The following…
Q: 50 people are randomly selected and the accuracy of their wristwatches is checked, with positive…
A: Given data is, n=50 x¯=93 secσ =223 secα=0.02 Claim:- The population mean of all watches is 0 sec.…
Q: A report stated that 21% of babies are delivered by Caesarean section. A researcher believes that…
A: popualtion proportion = 0.21 sample proportion = 8/50 = 0.16 n = 50
Q: total variation(SSI): value of F test statistic? Select one: O a. 6.19 O b. 4.58 O c. 5.47 O d.…
A: It is given that the one-way ANOVA comparing 5 groups with 10 observations per group i.e, Total…
Q: According to a survey, the average American person exercises 3 hours per week. To test if the amount…
A: Given information- Population mean, μ = 3 Sample size, n = 15 Sample mean, x-bar = 2.5 hours per…
Q: What are the null and alternative hypotheses? Họ: | versus H,: (Type integers or decimals. Do not…
A: Given : Proportion of respondents who stated they talk to their pets on phone = 0.45 Sample size =…
Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…
A: given P0 =0.37 n=170
Q: A student wants to see if the number of times a book has been checked out of the library in the past…
A: The correlation coefficient: r=cov(x,y)σxσy=∑i=115(x-x¯)(y-y¯)/nσxσy=538.20*53.1=0.1217 The equation…
Q: 50 people are randomly selected and the accuracy of their wristwatches is checked, with positive…
A: Let μ denotes the population mean watch time. The claim of the test is that the average watch reads…
Q: In a study of 824 randomly selected medical malpractice lawsuits, it was found that 485 of them were…
A: Assume that p is the true proportion of medical malpractice lawsuits, who are dropped or dismissed.
Q: Determine whether the baseball player increased the speed of his fastball at the 1% significance…
A: Let μ be the mean speed per hour. Given that, Population mean (μ)=91 miles per hourNo. of fastballs…
Q: 2. In a random sample of males, it was found that 25 write with their left hands and 210 do not. In…
A: 2) Original claim Rate of left-handedness among males is less than that among females 3)…
Q: Since an instant replay system for tennis was introduced at a major tournament, men challenged 1421…
A: Given Information : Since an instant replay system for tennis was introduced at a major…
Q: random sample of car crashes is obtained. Among 2792 occupants not wearing seat belts, 33 were…
A: Given data,n1=2792x1=33p1=x1n1=332792 =0.0118n2=7654x2=18p2=187654=0.0024 Determine the test…
Q: In a certain school district, it was observed that 30% of the students in the element schools were…
A: Determine the hypothesized population proportion for this test. From the information, given that…
Q: You are a research assistant at a zoo. The question of your study is "Has the proportion of baby…
A: From the provided information, The question of your study is "Has the proportion of baby zebras born…
Q: In a survey, 45% of the respondents stated that they talk to their pets on the telephone. A…
A: Given,n=240x=104p^ =xn p^ =104240 p^ =0.4333H0 :P=0.45H1 : P<0.45α=0.01
Q: In a survey, 33% of the respondents stated that they talk to their pets on the telephone. A…
A: The given data is as follows:Sample size (n) =210Number of owners who spoke to the pet on phone…
Q: Suppose 450 subjects are treated with a drug that is used to treat pain and 140 of them developed…
A: Given Information: Sample size n=450 subjects Out of which x=140 developed nausea. Significance…
Q: An assembly line will be shut down for maintenance if the defect rate exceeds 2.3%. Suppose you…
A: Given data: p =2.3 % = 0.023 Sample size = 200 Significance level = 5 % To find: For what values of…
Step by step
Solved in 2 steps
- In a study of 820 randomly selected medical malpractice lawsuits, it was found that 471 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. What is the test statistic? (Round to two decimal places as needed.)9. What is the test statistic?z= _____What is the P-value?P-value= _____S A 9-year-old girl did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her K left hand, and then she asked the therapists to identify the selected hand by placing their hand just under her hand without seeing it and without touching it. Among 275 trials, the touch therapists were correct 115 times. Use a 0.01 significance level to test the claim that touch therapists use a method equivalent to random guesses. Do the results suggest that touch therapists are effective? docx @ Identify the null and alternative hypotheses for this test. Choose the correct answer below. 2 OA. Ho: p*0.5 H₁: p=0.5 View an example Get more help. D W Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is (Round to two decimal places as needed.) S C. Ho: p=0.5 H₁: p*0.5 Monroe's Temp....docx Removed X command H # 3 8.0 F3 E D C $ 4 Q R F…
- Which of the following statements about the False Discovery Rate (FDR) is correct? The FDR is the only method available for controlling multiple testing error in transcriptional profiling data The FDR cutoff value should be held to the same standard as the p-value cutoff when doing hypothesis testing The FDR can be interpreted as meaning “the proportion of the significant gene list one would expect to find significant by chance due to the multiple testing error” The FDR greatly simplifies analysis, allowing researchers to add many more treatment groups to their experimental designs Its best to save your signal intensity data before calculating the FDR, as the FDR calculation will change the signal values for all of your dataA student wants to see if the number of times a book has been checked out of the library in the past year and the number of pages in the book are related. She guesses that the number of times a book has been checked out of the library in the past year will be a predictor of the number of pages it has. She randomly sampled 15 books from the library, test her claim at a 0.05 level of significance. number of times checked out number of pages 13 223 45 350 49 377 30 371 3 343 7 280 17 218 7 265 20 382 23 287 1 313 30 388 20 358 2 311 40 421 The correlation coefficient: r= (round to 3 decimal places) The equation y=a+bx is: (round to 3 decimal places) y=+ x The hypotheses are: H0:ρ=0H0:ρ=0 (no linear relationship)HA:ρ≠0HA:ρ≠0 (linear relationship) (claim) Since αα is 0.05 the critical value is -2.16 and 2.16 The test value is: (round to 3 decimal places) The p-value is: (round to 3 decimal places) The decision is to reject H0H0 do not reject…8.42 Sample size needed for an evaluation. You are planning an evaluation of a semester-long alcohol awareness campaign at your college. Previous evaluations indicate that about 20% of the students surveyed will respond Yes to the question "Did the campaign alter your behavior toward alcohol consumption?" How large a sample of students should you take if you want the margin of error for 95% confidence to be about 0.07?
- A telephone company claims that more than 15% of its customers have at least two telephone lines. The company selects a random sample of 250 customers and finds that 50 have at least two telephone lines. Does the data support the claim? Use a P- value. Which of the following is correct? a. H0: p = 0.15 versus H1: p = 0.15, reject HO at 0.05 level of significance O b. H0: p ≤ 0.15 versus Hl: p > 0.15, at 0.01 level of reject HO significance c. H0: p ≤ 0.15 versus Hl: p > 0.15, not reject HO at 0.01 level of significance O d. H0: p ≤ 0.15 versus H1: p > 0.15, not reject HO at 0.05 level of significance do doA random sample of car crashes is obtained. Among 2792 occupants not wearing seat belts, 33 were killed. Among 7654 occupants wearing seat belts, 18 were killed. Use a 0.01 significance level to test the claim that seat belts are effective in reducing fatalities. Consider the occupants not wearing seat belts to be population 1. Determine the p-value.Round your answer to 4 decimal places.If you want to be 95% confident of estimating the population proportion to within a sampling error of±0.03, what sample size is needed? A sample size of _is needed.? round up to nearest integer
- A publisher reports that79%of their readers own a personal computer. A marketing executivewants to test the claim that the percentage is actually more than the reported percentage. A randomsample of 100 found that89%of the readers owned a personal computer. Is there sufficient evidence atthe 0.02 level to support the executive’s claim?I believe that the population mean number of times that adults go for a walk each week is less than 2.0. I spoke with 8 adults and found that they went on walks 3,5,2,1,0,4,0 and 5 times last week. Test this hypothesis at the 0.5 significance level.20201020154015353060251053015601560303025101730153540151550122525301045154510306010603030901515154515545102535303530154515306060605551025602040203060401590601535104535126030307103010606035304510305304065253510306030305030501220306010101560305335153045303030751010301516015451010253560451590303015607530404014130301560407254515301510102030303015454025203012514114130302060203035153560106045105