A manufacturer of aspirin claims that the proportion of headache sufferers who get relief with just two aspirins is 63.5%. What is the probability that in a random sample of 480 headache sufferers, less than 59.4% obtain relief?

Q: A test for a certain disease has a probability of 0.92 of detecting the disease when it is present…

A: We have given that P( disease) = 0.70P( no disease) = 0.30P( positive | disease) = 0.92P( positive |…

Q: A university administrator expects that 25% of students in a core course will receive an A. He looks…

A: Step 1: State the given: population proportion, p = 25% = 0.25sample size, n = 60 Step 2: Recall the…

Q: Find the full probability distribution of the number of correct answers that Simon can get. Then…

A: It is given that the random variable i.e, the number of correct answer follows Binomial distribution…

Q: ased on historical data, your manager believes that 37% of the company's orders come from first-time…

A:

Q: A researcher wants to test the claim of an online article that 78% of Americans eat healthy each…

A:

Q: Migraine medication was administered to patients in that 5% experienced weight gain as a side…

A:

Q: The medication Nealapril is used to lower high blood pressure. It is known to cause headaches in…

A: We have given that,  Let X be the random variable from binomial distribution with probability (p)=…

Q: Based on historical data, your manager believes that 32% of the company's orders come from…

A: Given p=0.32n=89 Let the sample proportion be denoted by p^

Q: A factory produces components of which 5% are defective. Using a suitable approximation, what is the…

A: This problem can be solved using Poisson distribution.

Q: Based on historical data, your manager believes that 37% of the company's orders come from…

A:

Q: A courier service company wishes to estimate the proportion of people in various states that will…

A: number of samples, n = 330 true proportion, p = 0.05 Let, p^ be the sample proportion.  Hence p^…

Q: According to the American Red Cross, 11.9% of all Connecticut residents have Type B blood. A random…

A: Let the random variable X denote the number of Connecticut residents that have Type B blood and it…

Q: (a) Find the probability that more than 40% of the people in this sample have highblood pressure.(b)…

A: Given : n=75 , p=0.3 Our aim is to find the following :  (a) Find the probability that more than 40%…

Q: Based on historical data, your manager believes that 29% of the company's orders come from…

A: The question is about sampling dist. of sample prop.Given :Popl. prop. of company's order come from…

Q: n insurance agent knows that 18% of deer-car collision claims are filed in November. Consider a…

A:

Q: Physicians at a clinic gave what they thought were drugs to 850 asthma, ulcer, and herpes patients.…

A: Solution-: Given: We find p-value=?

Q: Based on historical data, your manager believes that 33% of the company's orders come from…

A: Given: n= Sample size =52p= Probability of population proportion of orders from first time…

Q: Based on historical data, your manager believes that 34% of the company's orders come from…

A: Given that  p=0.34(34%) n=78

Q: Based on a​ poll, 70​% of Internet users are more careful about personal information when using a…

A: In this case, each surveyed user is inferred to have only options of being "more careful" (i.e.,…

Q: If a condition has a 30% prevalence, what is the expected number of cases in a random sample of 200?

A:

Q: According to the American Red Cross, 8% of all Connecticut residents have type B blood. A random…

A: Let X be the number of CT residents who have type B blood which follows binomial distribution. Here,…

Q: According to a candy​ company, packages of a certain candy contain ​20% orange candies. Find the…

A: Given p=20%=0.20 n=200

Q: When a production line is properly adjusted, it is found that 4% of the mechanical components…

A: Null Hypothesis (H0): The current setting is correct, and the defect rate is 4%. This means p =…

Q: Suppose a large consignment of televisions contained 11% defectives. If a sample of size 237 is…

A:

Q: an experimental drug has been shown to be 75% effective in eliminating symptoms of allergies in…

A:

Q: A manufacturer of aspirin claims that the proportion of headache sufferers who get relief with just…

A: Given Information No of headache sufferers (n) = 400 Proportion of Headache sufferers who get relief…

Q: An experimental drug has been shown to be 75% effective in eliminating symptons of allergies in…

A:

Q: An experimental drug has been shown to be 75% effective in eliminating symptoms of allergies in…

A: Obtain the probability that the drug is effective on half of the participants. The probability that…

Q: The Bureau of Labor Statistics reported in a recent year that 5% of employed adults in the United…

A: From the given information we can write that, Proportion of employed adults in the United States who…

Q: Based on historical data, your manager believes that 32% of the company's orders come from…

A: The probability that the sample proportion is greater than than 0.45 = 0.00352

Q: A test for a certain disease has a probability of 0.92 of detecting the disease when it is present…

A:

Q: Suppose that a random sample of 20 computer owners is selected and that 14 have a firewall…

A: True proportion of computer owners who have a firewall installed is 0.40 So, probability that a…

Q: Given a normal population with mean = 39 and variance = 16, what is the probability of obtaining an…

A:

Q: If 11% of the population has a certain illness , what is the expected number of ill people in a…

A:

Q: A study showed that the sex ratio of children born to families in a native community of Ontario…

A: A study showed that the sex ratio of children born to families . Given: A news paper report about…

Q: According to the American Red Cross, 10.8% of all Connecticut residents have Type B blood. A random…

A: Given,n=20p=0.108X~Binomial(n=20 , p=0.108)

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.