In random samples, 74 of 250 persons who watched a certain television program on a small TV set and 92 of 250 persons who watched the same program on a large set remembered 2 hours later what products were advertised. Use the x² statistic to test the null hypothesis 01 = 02 against the alternative hypothesis 01 02 at the 0.01 level of significance. 2

Q: An article in a journal reports that​ 31% of American fathers take no responsibility for child care.…

A: Given, Population proportion P=31%=0.31 Sample size of fathers n=235 Number o fathers who did not…

Q: Does this provide evidence that the proportion of UCD students who are left-handed differs from the…

A: Given : n=240 , X=30 , p0=0.10 , α=0.05 Here , we want to test the claim that the proportion of UCD…

Q: In a survey of 240 students in an elementary statistics class at the University of California-Davis…

A: State the hypotheses. That is, there is no evidence to conclude that the proportion of UCD students…

Q: Researchers conducted trials to investigate the effects of color on creativity. Subjects with a. Red…

A: Given Data : For Sample 1 x̄1 = 3.73 s1 = 0.56 n1 = 41 For Sample 2…

Q: Of a random sample of 142 admissions counselors on college campuses 39 indicated that, on average,…

A: It is given that: The sample size, i.e., the no. of sampled admission counselors, n=142. The no. of…

Q: A machine is considered to be unsatisfactory if it produces more than8% defectives. It is suspected…

A: State the hypotheses.   Obtain the value of the test statistic. The required value is, Thus, the…

Q: An environmentalist wishes to conduct a hypothesis test on the percentage of cars driven in the city…

A: Sample size (n) = 173Population proportion (p) = 0.08Thus,

Q: A simple random sample of size n 200 drivers with a valid driver's license is asked if they drive an…

A: Solution: Given information:  n= 200 Sample size of drivers  x = 122 drivers drive an American made…

Q: An education researcher claims that at most 3% of working college students are employed as teachers…

A: Solution: From the given information, p-hat=0.04 and n=200. The given claim is that at most 3% of…

Q: In a survey of 240 students in an elementary statistics class at the University of California-Davis…

A: Given that : n=240                      x=19 (Left handed) x=221 (Right handed) By using one sample…

Q: A recent college graduate is trying to decide whether or not pursuing a Master's degree is worth it.…

A: We have to test that if adults with masters degree earn more than adults with bachelor's degree…

Q: An environmentalist wishes to conduct a hypothesis test on the percentage of cars driven in the city…

A: Sample size(n)=143 Population proportion(P)=0.04 q=1-p q=1-0.04=0.96

Q: Women: 53 patients had high blood pressure Required: Test Value Only the final answer should be…

A: Given :   n1= 168 n2= 168 significance level, 0.05 sample proportion p̂1…

Q: A simple random sample of size n=200 drivers with a valid driver's license is asked if they drive an…

A: Given : A simple random sample of size n = 200 drivers with a valid driver's license is asked if…

Q: A study of parental empathy for sensitivity cues and baby temperament (higher scores mean more…

A: Solution: Given information: n1= 34 Sample size of mothern2= 40 Sample size of fatherx1= 69.04…

Q: A doctor claims that less than 75% of the patients that he performs a knee replacement surgery on…

A:

Q: A  simple random sample of size n = 200 drivers with a valid driver's license is asked if they drive…

A: The answer to the question :  "Do you drive an American-made automobile?" is either  "Yes" or "No"…

Q: An oil company claims that less than 20 percent of all car owners have not tried its gasoline. Test…

A: Stating the appropriate null and alternative hypotheses: The hypotheses are given below: Null…

Q: An exercise science student believes that during professional rugby games the average distance…

A: Provided that : When reviewing game statistics the student found that the average distance covered…

Q: A recent college graduate is trying to decide whether or not pursuing a Master's degree is worth it.…

A: Level of significance = 0.05 Claim: Adults with master degree earn more money. Null hypothesis:…

Q: Find the critical value (or values) for each set of conditions. a. α = 0.01, left-tailed test,…

A: Solution-: We want to find critical value/ values for each set of conditions. (a) α=0.01, left…

Q: In a random sample of 100 ​items,15 are defective. If the null hypothesis is that 15% of the items…

A: Given info: In a random sample of 100 ​items,15 are defective. The null hypothesis is that 15% of…

Q: USA Today article claims that the proportion of people who believe global warming is a serious issue…

A: Given that  Sample size n =20 Favorable cases x =12 Sample proportion p^=x/n  =12/20 =0.60

Q: A survey by a magazine stated that 14% of men said they used exercise to reduce stress. A random…

A: Solution: Given information: n= 100 Sample size of men x= 10 men said they used exercise to relives…

Q: Of a random sample of 95 small-business owners in Rome, Italy 54 said they liked statistical work.…

A: Given, Random sample of small buisness owner is of size n=95 The number of worker who liked…

Q: A researcher wants to compare the effectiveness of two treatments on a sample of 25 patients. What…

A: Introduction The Wilcoxon Signed-Ranks Test is a non-parametric test used to compare two independent…

Q: (a)Let ?1 be the population mean of x1 and let ?2 be the population mean of x2. Find a 99%…

A:

Q: An environmentalist wishes to conduct a hypothesis test on the percentage of cars driven in the city…

A: sample size(n)=173 Population proportion(P)=0.08 q=1-p q=1-0.08=0.92

Q: What type of variable is "drive an American-made automobile, or not"?…

A: A simple random sample of size n = 200 drivers with a valid driver's license is asked if they drive…

Q: has been found that 25.1% of men (Group 1) 20 years and older suffer from hypertension (high blood…

A: Givan It has been found that 25.1% of men (Group 1) 20 years and older suffer from hypertension…

Q: 200 poodles 61 are left-paued left -pawed. a random sample of In a random sample ef 220 labradores…

A: It is given that in a sample of 200 poodles 61 are left pawed and 38 are left pawed out of 220…

Q: A random sample of 1200 apples was taken from a large consignment and found that 10% of them are…

A:

Q: researcher wants to determine if there is a significant difference in the number of times a new…

A: Answer: The null hypothesis for this test is that there is no difference in the medians of the two…

Q: An experiment was conducted to test if 2 new anti-anxiety medications will have an effect on number…

A: Identify the option that is correct for the given statement.   The correct option is identified…

Q: study of parental empathy for sensitivity cues and baby temperament (higher scores mean more…

A: Given : Random sample of 38 mothers :  x1 = 69.04 σ1 = 11.27 n1 = 38   Random sample of 31 fathers :…

Q: The principal of a certain high school claims that 85% of all the students is in favor of the new…

A: Let, P and p are the population and sample proportion respectively. Here 0.05 level of significance…