ppose the CEO of a company states that 90% of it’s customers are very satisfied with it’s services. A random sample survey of customers is conducted to see if the satisfaction rate is less than the CEO states and a P-value of 0.023 was obtained for the sample proportion of 80%. Interpret the meaning of this P-value in this context. Notes for this problem: o I am asking you to tell me what the P-value of 0.023 tells us about the particular values (90%, 80%) and for the company’s customers. o I am not looking for the definition of a P-value. o I am not asking for whether you reject H0 or fail to reject H0.

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: Listed below are the amounts of net worth (in millions of dollars) of the ten wealthiest celebrities…

A: Part a: From the given data we have the computations for mean and sample standard deviation as…

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: Additional Problem: In a Gallup Social Series Poll on Crime conducted last October with 691 female…

A: Given : Claim : fewer than 50% of female adults believed that crime increased in the area in which…

Q: A running coach wants to know if participating in weekly running clubs significantly improves the…

A: Option a) is correct.

Q: The college Physical Education Department offered an Advanced First Aid course last quarter. The…

A: Givenz-scores of students isSue=-1.30Bill = -0.92mary = 0.00Mark =2.65Ben = 2.04Sam = -1.59

Q: 4. You are a quality control manager at The Laughing Tomato (HAHAHAHA). You’ve been told by the…

A: 4. The given data shows the service times.

Q: Mercury is a persistent and dispersive environmental contaminant found in many ecosystems around the…

A: a) Mean = 1.24 median = 0.57 There is heavy positive skewness in the data.

Q: Levi-Strauss Co manufactures clothing. The quality control department measures weekly values of…

A: Given the data of weekly values of different suppliers for the percentage difference of waste…

Q: The owner of a local nightclub has recently surveyed a random sample of n = 250 customers of the…

A: From the provided information, Sample size (n) = 250 She would now like to determine whether or not…

Q: We want to find out if college students trust a presidential candidate (in this case Mitt Romney).…

A: Given data : sample size, n = 29 sample mean, x̄ = 3.49 sample standard deviation,s= 2.0 population…

Q: (1) The number fired because of inability to get along with others is 3. (2) The number fired…

A: The objective of the question is to find the probability of a certain number of employees being…

Q: In a poll conducted by the General Social Survey, 81% of respondents said that their jobs were…

A: From the provided information, 81% of respondents said that their jobs were sometimes or always…

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: 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: Blood pressure is distribued Normally, with a mean of 85 mm and a standard deviation of 20 mm. As a…

A: Given,mean(μ)=85standard deviation(σ)=20sample size(n)=100

Q: After reading an article using research done by the Organization for Economic Co-operation and…

A: The 95% confidence interval for p is (0.25, 0.32).

Q: What is the​ p-value?

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

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

A:

Q: 2. A large company randomly samples 5% of its customers and compares their rate of satisfaction to…

A: Normal distribution is a continuous distribution that has many real-life applications. The standard…

Q: A service station owner believes that equal numbers of customers prefer to buy gasoline on every day…

A: It is needed to test the whether the number of customers who prefers to buy gasoline on each day of…

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

A: given that

Q: A pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

A: It is given that margin of error (E) is 0.04 and the confidence level is 0.95.

Q: What is Ha? (H0 is the mean VIQ scores for the younger, middle-aged, and older subjects are all not…

A: Given the Null Hypothesis : H0 : is the mean VIQ scores for the younger, middle-aged, and older…

Q: (a) Find the mean of p, wherep is the proportion of left-handed individuals in a random sample of…

A: Let p be the proportion of left-handed people. Given that p = 12 % = 0.12 Sample size is n = 1650.

Q: Suppose a marriage counselor believes that the proportion of married couples with three personality…

A: The provided information are:

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: The manufacturer of an MP3 player wanted to know whether a 10% reduction in price is enough to…

A:

Q: What is Ha?

A: (H0 is the mean VIQ scores for the younger, middle-aged, and older subjects are all not different…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.