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: An attorney claims that more than 25% of all lawyers advertise. A sample of 200 lawyers in a certain…

A: Claim:p>0.25   n=200       x=63       p∧=xn=63200=0.315   α=0.05 ∴H0:  p=0.25     H1:   p>0.25…

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: A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…

A: Given: p0=0.98α=0.01n=500x=480

Q: A psychologist claims that students are more attentive in classes taught by instructors rated as…

A: Given that  Based on the data given it is related to two sample proportion for hypothesis test The…

Q: A researcher made a survey regarding the proportion of male and female college students who dropped…

A:

Q: Suppose that 75% of college students prefer pepperoni on their pizzas. You took a sample of ?=150 at…

A:

Q: What is the p-value only?

A: It is given that  In the original solution  The value of the test statistic is z = 3.92. The given…

Q: n automobile owner found that 20 years ago, 74% of Americans said that they would prefer to purchase…

A:

Q: Suppose that historically, the proportion of people who trade in their old car to a car dealer when…

A: Givensample size(n)=115No.of old cars(x)=46p^=xn=46115=0.40

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: hypotheses for this test are Ho: P1 – P2 = 0 vs. Ha: P1 – P2 # 0 and x=0.05. What is the p-value?…

A: For sample 1, we have that the sample size is N1=100N_1= 100, the number of dead cases is X1=22X_1 =…

Q: The Statistics Games are played by a large number of students across the county. Last year, 32% of…

A:

Q: In a CBS poll of 1289 adults, nationwide, asking whether they favor or oppose teacher and school…

A:

Q: You are testing the claim that the proportion of men who own cats is larger than the proportion of…

A: Denote p1, p2 as the true population proportions of men and women who own cats, respectively.

Q: 6. Twenty years ago, 46% of parents of children in high school felt it was a serious problem that…

A: Z test for one proportion

Q: What is the​ p-value?

A: Here sample size is too large so use z test for proportion

Q: A child dying from an accidental poisoning is a terrible incident. Is it more likely that a male…

A:

Q: In June of 1997, Australians were asked if they thought unemployment would increase, and 52%…

A: Given Information : In June of 1997, Australians were asked if they thought unemployment would…

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

A:

Q: An article reports that in a sample of 124 nurses, 51 said that a busy workload had a positive…

A:

Q: 6. Twenty years ago, 46% of parents of children in high school felt it was a serious problem that…

A: As per our guidelines we are suppose to do only one question6)

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: Identify the null and alternative hypotheses for this test.

A: Test is that whether the percentage of females aged 15 and  older who live alone has changed from…

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

A: Given that  Sample size n =900 Population proportion p=47%=0.47

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: In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20…

A:

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, 52% of parents of children in high school felt it was a serious problem that high…

A:

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: In a sample of 88 children selected from a city, 8 children suffer from asthma. What is the P-value…

A: Statistical hypothesis testing is an important method in inferential statistics. Statistical tests…

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

A:

Q: A dietician read in a survey that 70.5% of adults in the U.S. do not eat breakfast at least 3 days a…

A: It is need to be tested whether the population proportion of adults in U.S who do not eat breakfast…

Q: In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20…

A: a) Denote p as the true proportion of guests who catch pike over 20 pounds.

Q: olex claims that its watches on average will neither gain nor lose time during a week. A sample of…

A: The question is about hypothesis testing.Given :Sample no. of watches ( n ) = 18

Q: Suppose that 75%75% of college students prefer pepperoni on their pizzas. You took a sample of…

A: It is given that  Sample size n = 150 Sample proportion = 0.70 Level of significance = 0.10 Test :…