A marriage counselor has traditionally seen that the proportion p of all married couples for whom her communication program can prevent divorce is 79%. After making some recent changes, the marriage counselor now claims that her program can prevent divorce in mot e than 79% of married couples. In a random sample of 225 married couples who completed her program, 194 of them stayed together. is there enougn evidence to suppore che marriage counselor's claim at the 0.10 level of sionificance:

Q: State the conclusion for this hypothesis test. OA. Do not reject Ho. There is not sufficient…

A: The level of significance is 0.1 and the p-value is 0.472.

Q: In a previous year, 56% of females aged 15 years of age and older lived alone. A sociologist tests…

A: From the provided information, Sample size (n) = 700 From which 406 are living alone. Level of…

Q: Brink studied the effect of postural change on cardiovascular reactivity for a sample of healthy…

A:

Q: A sample of 800800 computer chips revealed that 43%43% of the chips do not fail in the first…

A: The question is about hypo. testing Given : Randomly selected no. of comp. chips ( n ) = 800 Sample…

Q: (a) State the null hypothesis H and the alternative hypothesis H. Ho H :0 (b) Determine the type of…

A: n= 205 Sample proportion = 126/205 = 0.615 Population proportion = 0.7

Q: A survey claims that 9 out of 10 doctors (i.e., 90%) recommend Kiva for their patients who have…

A: Solution: A. State the hypotheses Null hypothesis: That is, the proportion of doctors who…

Q: To determine this, you test the following hypotheses:   Select one: H0:p1=p2 vs Ha:p1p2 H0:p1=p2…

A: From the given data  Option (4) is correct to test the hypothesis  ie, Null hypothesis:H0:p1=p2…

Q: In a previous year, 56% of females aged 15 and older lived alone. A sociologist tests whether this…

A: X=214 n=400

Q: A housing development can only build on a certain plot of land if can show that the average level of…

A: From given we have data set : 16,50,35,80,15,27,99,68,11,98,34

Q: 's claim at 5% significance that less than two-thirds (67%) of U.S. adults thought that keep the…

A:

Q: Find the test statistic for this hypothesis test. 2o = (Round to two decimal places as needed.)

A: It is given that x =258 and n =450.

Q: A research center claims that 24% of adults in a certain country would travel into space on a…

A: Given Information: 24% of adults in a certain country would travel into space on a commercial flight…

Q: A hospital reported that the nomal death rate for patients with etensive burns (more than 40% of…

A:

Q: The Education Ministry claims that the dropout rate for Form 6 students in their country is less…

A: From the provided information, Population proportion (p) = 0.20 The hypotheses can be constructed…

Q: A humane society claims that less than 62% of households in a certain country own a pet. In a random…

A: GivenA humane society claims that less than 62% of households in a certain country own a pet. In a…

Q: Are couples that live together before they get married less likely to end up divorced within five…

A:

Q: Recently, a large academic medical center determined that 8 of 19 employees in a particular position…

A: Solution: Given data X = 8 n =19 Pi = .54 Level Of significance = 0.05

Q: An urban community would like to show that the incidence of breast cancer is higher in their area…

A: Givenx1=20n1=200x2=10n2=150significance level(α)=0.05

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

A:

Q: The recommended daily dietary allowance for zinc among males older than age 50 years is 15 mg/day.…

A: The random variable daily zinc intake follows normal distribution. We have to test whether average…

Q: In a previous year, 62% of females aged 15 and older lived alone. A sociologist tests whether this…

A: From the given information z0 = -0.47p-value = 0.639Significance level () = 0.10

Q: (a) State the null (H0) and alternate (Ha) hypotheses.       H0:      Ha:      (b) If the null…

A: The null and alternative hypotheses are H0: p = 0.7 H1: p>0.7

Q: An automobile manufacturer is considering using robots for part of its assembly process. Converting…

A: Type-I error: The probability of rejecting Null Hypothesis H0 , when H0 is true and it is denoted by…

Q: A study of 420,002 to cell phone users found that 133 of them develop cancer of the brain and…

A:

Q: A survey of 30 r/s students in a large college indicated that 19 of them held off-campus  jobs. Does…

A: It is given that a survey of 30 randomly selected students in a large college indicated that 19 of…

Q: The worldwide market share for a web browser was 20.5​% in a recent month. Suppose that a sample of…

A: Given,n=240x=60sample proportion(p^)=xnsample proportion(p^)=60240=0.25population…

Q: Asurvey was conducted of newlyweds in a country who have a spouse of a different race or ethnicity…

A:

Q: Vertical banded gastroplasty is a surgical procedure that reduces the volume of the stomach in order…

A: Level of significance is the probability of rejecting null hypothesis when it is true. Here, level…

Q: Two different types of injection-molding machines are used to form plastic parts. A part is…

A: Given,Machine 1sample size n1=300Number of defective parts x1=16Machine 2 Sample size n2=300Number…

Q: In a previous year, 62% of females aged 15 and older lived alone. A sociologist tests whether this…

A: It is given that 62% of females aged 15 and older lived alone.

Q: Many states have attempted to reduce the blood-alcohol level at which a driver is declared to be…

A: Graph:We have used a boxplot to identify whether the distribution of DiffTimes is normal or not. We…

Q: Among 2046 cars made by Company A in 1999, 56 had a problem in the brake system. Suppose that one…

A: Given information

Q: Two different types of injection-molding machines are used to form plastic parts. A part is…

A: a) Given information: n1=300 n2=300 x1=16 x2=8…

Q: 11) A national health survey weighed a sample of 531 boys aged 6-11 and found that 86 of them were…

A: a). Null and alternate hypotheses: The investigator is specifically interested to test whether the…

Q: Average IQ scores for young school children are known to be 100 (SD = 15).  However, the literature…

A: A. If the level of significance was set at p<0.05, then critical Z-score would be, Here, the…

Q: A sample of 137 burglaries indicated that 58 were not via an open or unlocked door or window. At the…

A: It is given that number of burglaries were not via an open or unlocked door or window (x) is 58 and…

Q: The recommended daily dietary allowance for zinc among males older than age 50 years is 15 mg/day.…

A: We have given that  Sample size n =116 Sample mean = 12.5  Standard deviation =6.35 Level of…

Q: Random samples of 324 are taken from a large population and studied. It was found that x = 7.41. If…

A: Sample size n=324

Q: Is there a difference between men and women when it comes to seeking preventative healthcare? At the…

A: The random variable preventative care follows binomial distribution. There are two independent…