Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.10 level of significance, to conclude that the proportion, p, of all dentists who now recommend this brand is less than 81%.
Q: 2) Assume the p=.03 (3%). How large a sample is needed to estimate the proportion of breast cancer…
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Q: Only about 15% of all people can wiggle their ears. Is this percent higher for millionaires? Of the…
A: The p is the proportion of people who can wiggle their ear The hypothesized proportion p=0.15 The…
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A: 1 and 2
Q: Test the claim that the proportion of people who own cats is significantly different than 20% at the…
A: Given that Sample size: n =400 Sample proportion: p^=0.12 Population proportion: P=0.20 Level of…
Q: Q: Bring the following hypothesis in a formula form: Women are not more motivated than man There is…
A: Hypothesis is an assumption that is being tested.
Q: d. The p-value = 0.4238 x (Please show your answer to 4 decimal places.) e. The p-value is sa f.…
A: GIVEN DATA, claim:p>0.56x=170n=278p^=xn=170278=0.6115here we have to find out the p-value for the…
Q: A reporter has claimed that the majority of Colleges in the United States are Private For-Profit…
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Q: The proportion of Americans who have frequent migraines is 15.2% according to the CDC. An…
A: From the provided information, Sample size (n) = 133 From which 16 report experiencing migraines…
Q: torists do not have motor vehicle insurance. A random survey amongst 150 motorists found that 54 do…
A: A random survey amongst 150 motorists; n=150
Q: Twenty years ago, 47% of parents of children in high school felt it was a serious problem that…
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Q: Find the value of the test statistic z. The claim is that the proportion of drowning deaths of…
A: It is given that the claim is the proportion of drowning deaths of children attributable to beaches…
Q: Claim: Most adults would erase all of their personal information online if they could. A software…
A: Confidence interval is used to determine the range where the true parameter lies. It can be…
Q: A national health survey weighed a sample of 260 boys aged 6-11 and found that 45 of them were…
A: Given that: Sample 1(boys): n1=260x1=45 Sample 2(girl): n2=230x2=30 Level of significance, α=10%
Q: Conduct a hypothesis testing for the results of the correlation between the writing skills and…
A: The concept of testing hypothesis is one of the method of statistical inference where we take the…
Q: Test the claim that the proportion of people who own cats is smaller than 70% at the 0.01…
A: Given: Sample size (n) = 500 The hypotheses are as follow: H0: p = 0.70 H1: p < 0.70 Sample…
Q: Test the claim that the proportion of men who own cats is significantly different than 45% at the…
A: Solution: Let X be number of men owned cats and n be the sample number of men. From the given…
Q: At the 0.05 level of significance, is there evidence of a difference in the proportion of males and…
A: For males, sample size n1 = 300, and proportion of males who make an impluse purchase is 62% = 0.62…
Q: A national survey of 1000 adult citizens of a nation found that 19% dreaded Valentine's Day. The…
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Q: A research firm carried out a hypothesis test on a population proportion using a right-tailed…
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Q: Are you an impulse shopper? A survey of 600 grocery shoppers indicated that 57% of males and 44%…
A: Given: Sample size of male n1=300Sample size of females n2=300Proportion of male who made impulse…
Q: It has been claimed that at UCLA 43% of all students live on campus. Researcher Ebony Robinson…
A: Given X=112 n=250
Q: Suppose a study reported that the average person watched 5.71 hours of television per day. A random…
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Q: A researcher investigated whether there was a relationship between the time spent being read to as a…
A: Aim is to checking whether there is a relationship between the time spent being read to as child and…
Q: Test the claim that the proportion of people who own cats is larger than 80% at the 0.025…
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Q: Set up the hypotheses for the one-mean t-test. Ho: 비 Ha: H V A
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Q: 5.5 2.1 Suppose a study reported that the average person watched 5.71 hours of television per day. A…
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Q: It is thought that 12% of all students taking a particular course received a grade of A. In a sample…
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Q: Proctor & Gamble claims that at least half the bars of Ivory soap they produce are 99.44% pure (or…
A: x = 46 n = 101
Q: Would you favor spending more federal tax money on the arts? Of a random sample of n1 = 236 women,…
A: From the provided information,
Q: Test the claim that the proportion of people who own cats is smaller than 70% at the 0.01…
A: Hypothesis Ho: p=0.70 vs H1: p< 0.70 Given Alpha= 0.01, pcap= 0.64, n=500
Q: A researcher wants to know whether athletic men are more flexible than nonathletic men. For this…
A: The given sample size for athletic men is 50, sample mean is 4.3, sample standard deviation is 2.1,…
Q: Is there a difference in the proportion of individuals with food allergies between young children…
A: Denote p1 is true proportion of young children have food allergy and p2 is the true proportion of…
Q: Students in a high school statistics class are investigating the proportion of times a Hershey's…
A: We have to find correct conclusion from available options.
Q: in october 1947 the gallup organization surveyed 1000 adult americans and asked are you a total…
A: We have given thatn1 = 1000 , x1 = 378n2 = 1000 , x2 = 333Significance level (α) = 0.05Now,p̂1 =…
Q: Test the claim that the proportion of people who own cats is smaller than 70% at the 0.10…
A: The value of z-test statistic is,
Q: According to a 2015 article, 37% of Americans aged 25 years or older have been arrested. An Orange…
A: Given that sample size n = 120 Number of persons who have been arrested, X = 48 Level of…
Q: In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20…
A: Given that, In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern…
Q: Proctor & Gamble claims that at least half the bars of Ivory soap they produce are 99.44% pure (or…
A: Here we use z-test of a proportion. Proctor & Gamble claims that at least half the bars of Ivory…
Q: A publisher reports that 46% of their readers own a Jaguar. A marketing executive wants to test the…
A: Given, Sample size = 220 Sample proportion = 0.50 The null and alternative hypothesis is:
Q: A table summarizes the success and failures when subjects used different methods (yoga, acupuncture,…
A: H0 : success is independent of the method used H1 : success is dependent on the method used
Q: Proctor & Gamble claims that at least half the bars of lvory soap they produce are 99.44% pure (or…
A:
Q: 143 individuals who had two warts. She applied cream A on one wart and cream B on the second wart.…
A: The effectiveness of a new cream in the two treatments of warts is measured. Sample size (n) = 143…
Q: The mayoral challenger claims that less than 30% of residents over the age of 25 have bachelor’s…
A:
Q: Can you conclude that the proportion of boys who are overweight differs from the proportion of girls…
A: Here use proportion test for 2 sample
Q: untreated depression will lose at least one friendship while not receiving treatment. On the other…
A: We have to find out absolute risk of losing at least one proportion while dealing with untreated…
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- According to a survey conducted by the Association for Dressings and Sauces, 20% of American adults eat salad once a week. A nutritionist suspects that this percentage is not accurate. She conducts a survey of 579 American adults and finds that 104 of them eat salad once a week. Use a 0.10 significance level to test the claim that the proportion of American adults who eat salad once a week is equal to 20%. Claim: p = 0.2 v which corresponds to H0: p = 0.2 Opposite: p 0.2 v which corresponds to H1 p + 0.2 The test is: right-tailed The test statistic is: z= (to 2 decimals) The Critical Value is: z= Based on this we: Fail to reject the null hypothesis v Conclusion: There does not proportion of American adults who eat salad once a week is equal to 20%. v appear to be enough evidence to support the claim that the Submit Question thing 近Would you favor spending more federal tax money on the arts? Of a random sample of n1 = 200 women, r1 = 55 responded yes. Another random sample of n2 = 162 men showed that r2 = 60 responded yes. Does this information indicate a difference (either way) between the population proportion of women and the population proportion of men who favor spending more federal tax dollars on the arts? Use ? = 0.05. What is the value of the sample test statistic? (Test the difference p1 − p2. Do not use rounded values. Round your final answer to two decimal places.)(c) Find (or estimate) the P-value. (Round your answer to four decimal places.)The claim that the proportion of accidental deaths of the ederly attribute to resident falls is more than 0.20, and the sample statistics include 60 deaths of the ederly with 15% of them attributable to resident falls. find the value of the test statistic z.
- In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20 pounds. Suppose that last summer 65 out of a random sample of 78 guests did, in fact, catch northern pike weighing over 20 pounds. Does this indicate that the population proportion of guests who catch pike over 20 pounds is different from 75% (either higher or lower)? Use ? = 0.05. -What is the value of the sample test statistic? (Round your answer to two decimal places.) -What is the value of the sample test statistic? (Round your answer to two decimal places.)Proctor & Gamble claims that at least half the bars of Ivory soap they produce are 99.44% pure (or more pure) as advertised. Unilever, one of Proctor & Gamble's competitors, wishes to put this claim to the test. They sample the purity of 133 bars of Ivory soap. They find that 54 of them meet the 99.44% purity advertised. Calculate the p-value.Q: An online bookseller is considering selling an e-reader but will do so only if they have evidence that the proportion of customers who will likely purchase one is more than 0.4. Of a survey of 25 customers, 8 of them stated that they would likely purchase an e-reader. What should the bookseller do? Use a 5% significance level.
- Andy Roddick, a former professional tennis player believes he can make 70% of his first serves that are at least 110 mph. His friends believe the percentage should be smaller than 70%. They challenged Andy to do 400 first-serves. Andy successfully served 260 times. The null hypothesis is that he can serve 70% of his first serves. The observed percentage is [A]%. Find the standard error for percentage. Hint: The SD for the box model is The standard error for percentage is [B]%. Round your answer to the nearest tenth of a percent(for example 6.3%) The z-statistic is [C]. Round your answer to two decimal places. The p-value is [D]%. Round your answer to the nearest tenth of a percent(for example 6.3%) If the significance level is set at 5%, do you reject the null hypothesis? Write yes or no. [E] If the significance level is set at 1%, do you reject the null hypothesis? Write yes or no. [F]For a special pre–New Year’s Eve show, a radio station personality has invited a small panel of prominent local citizens to help demonstrate to listeners the adverse effect of alcohol on reaction time. The reaction times (in seconds) before and after consuming four drinks are in data below. At the 0.005 level, has the program host made his point? Identify and interpret the p-value for the test. Data: Subject Before After 1 0.32 0.39 2 0.39 0.44 3 0.36 0.49 4 0.41 0.53 5 0.37 0.46 6 0.42 0.52 7 0.41 0.52 8 0.43 0.46 9 0.39 0.55 10 0.41 0.52 11 0.35 0.45 12 0.42 0.41 13 0.32 0.54 14 0.39 0.46 15 0.41 0.53 16 0.33 0.54 17 0.43 0.46 18 0.42 0.43 19 0.41 0.52 20 0.35 0.52 21 0.39 0.41 22 0.39 0.44 23 0.32 0.50 24 0.33 0.53 25 0.31 0.45 26 0.35 0.45 27 0.31 0.45 28 0.32 0.48 29 0.38 0.54 30 0.37 0.46 31 0.39 0.49 32 0.30 0.51 33 0.40 0.49 34 0.41 0.50 35 0.41 0.53 36 0.35 0.47 37 0.37 0.51 38 0.41 0.46A polling company conducted a hypothesis test to see if people are happy with the government, and they did so by conducting a two-sided test for a population ratio. population proportion). They calculated the value of the test statistic and found that it wasz=2.1 .What is the p-value of the test?
- Use the data below to test the claim that the weight loss was greater with the low fat diet compared to the low carbohydrate diet. Use a 5% level of significance. Low Fat Low Carbohydrate X = 4.71b X = 3.51b S1 = 7.21b "ị = 77 S1 = 6.91b n = 52 1. Identify the tail of the test. [ Select] 2. What is the P-value? [ Select] 3. Will the null hypothesis be rejected? [Select ] 4. Is the initial claim supported? [ Select]In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20 pounds. Suppose that last summer 59 out of a random sample of 85 guests did, in fact, catch northern pike weighing over 20 pounds. Does this indicate that the population proportion of guests who catch pike over 20 pounds is different from 75% (either higher or lower)? Use a = 0.05. (a) What is the level of significance? State the null and alternate hypotheses. O Ho: p = 0.75; H1: p 0.75 (b) What sampling distribution will you use? O The Student's t, since np 5 and ng > 5. O The standard normal, since np 5 and nq > 5. What is the value of the sample test statistic? (Round your answer to two decimal places.) (c) Find the P-value of the test statistic. (Round your answer to four decimal places.)A statistician changes her level of significance from .001 to .05. What impact will this change have on her risk of making a Type I and Type II error? Is the change in the level of significance a good decision? Why or why not?