The brokerage also wants to see if the proportion of its clients participating in retirement accounts has changed from 2001. Suppose that in 2001, the proportion of the firm’s clients that had a retirement account was .75. This year, a random sample of 120 clients revealed that 98 had some sort of retirement account. At the 1% level of significance, test to see if the proportion of clients who have a retirement account has changed 2001. (15) What is the p-value?

Q: A set of n = 6 scores has a mean of M = 10. Another set of scores has n = 4 and M = 15. If these two…

A: The combined mean can be calculated as, Xc = n1 x1 +n2 x2 n1+n2 Were, n1 is the sample size for the…

Q: A survey of 62 men found that 12 have a social media account. Another survey of 57 women found that…

A: Men are taken as group 1. Women are taken as group 2.   Given: n1=62x1=12n2=57x2=40α=0.07

Q: A survey of 78 men found that 10 have a social media account. Another survey of 51 women found that…

A: Given Information: Women: Sample size (n1) = 51 Out of which X1 = 26 have a social media account.…

Q: given as + Choose th

A: The margin of error is the amount of random sampling error in the results of a survey. The larger…

Q: calculate the effect size and round two decimal places

A: Let  be the two population means of the reading group and no reading group. Given that,Sample size…

Q: Over the past year, the vice president of human resources at a large medical center conducted a…

A: First we have to construct below rank table for the given data, Before After Difference…

Q: n 1971, there was a shift in attitudes, as Americans’ “ideal” family switched from four kids to two…

A: The median would stay the same as it is not affected by outliers   The mean would increase as it is…

Q: The median number of part-time employees at fast-food restaurants in a particular city was known to…

A: The median number of part-time employees at fast- food restaurant is 18. There are 7 fast-food…

Q: In Africa in 2011, the number of deaths of a female from cardiovascular disease for different age…

A: The data shows the number of deaths of a female from cardiovascular disease for different age…

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

A: from the above datawe are given thatp=0.14n=100x=10p^=xnp^=10100p^=0.10Test…

Q: Lecture(12.13): Researchers were investigating anxiety in first year college students.According to…

A: Given information:   Going for a walk/ doing physical activity    Listening to music/ watching a…

Q: Researchers examined the influence of a television program on children's aggressiveness. The number…

A: Since we only answer up to 3 sub-parts, I'll answer the 1st 3 sub-parts. Please resubmit the…

Q: imagine you’re hired by a beef company called “American Beef Makers” as a Data Analyst and you’re…

A: Please note that as per our guidelines if multiple sub-parts are there in a question we can answer…

Q: Dr. Smith is investigating whether squeezing a stress ball throughout the day improves job…

A: μ=45, n=100, x̄=50,

Q: Some scientists believe that the sickle-cell trait lowers the risk of developing malaria. To explore…

A: Step 1:   It is needed to test, whether there is an association between the sickle- cell trait and…

Q: An analysis was conducted to determine whether the average height of the 25 girls in the same class…

A: Here Avg height of 25 girls in the Same class is difference from population mean is checked Here…

Q: The correlation between mean 2015 Mathematics SAT scores and mean 2015 Writing SAT scores for all 50…

A: Given information: For all 50 states and the District of Columbia, the correlation between the mean…

Q: In a National Institute on Alcohol Abuse and Alcoholism survey, 33% of American adults said that…

A: Given: n= 2300 ,x= 805 p= 0.33 ,significance level(∝)= 95.0 p̂= 805 / 2300 =define hypothesis;-

Q: Please answer number 13.

A: It is given that 43% had no children, 18% are had one child, 18% are have two children, 21% have…

Q: A wildlife biologist is doing research on chronic wasting disease and its impact on the deer…

A:

Q: Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high…

A: From the provided information, Sample size (n) =750 and p0 = 0.54

Q: 8. Rachel Ray has a popular FoodNetwork show, 30 Minutes Meals. However, in a study conducted by USA…

A: given that

Q: poll of 60 people asking “do you prefer dogs or cats?” Was taken, and 53 of those surveyed said they…

A: Sample size n =60 Favorable cases x =53 Sample proportion p^=x/n  =53/60 =0.8833 Population…

Q: According to the most recent General Social Survey, 70% of adults watch TV nightly. A researcher…

A: Given that  According to the most recent General Social Survey, 70% of adults watch TV nightly.…

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: The value of p0 is 0.52 and the sample size n is 800.

Q: ren took part in a study at their dentist’s office. The dentist collected data on how many pieces of…

A: The p-value is less than 0.001.

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: The hypothesis tests, contain two hypothesis: null hypothesis and alternate hypothesis. The…

Q: Twenty years ago, 47% of parents of children in high school felt it was a serious problem that high…

A: Given that: n = 900 X = 293 P = 47%  By using proportion test to solve this problem

Q: Twenty years ago, 53% of parents of children in high school felt it was a serious problem that high…

A: