A new brand of drug-free nasal strip claims to be 90% effective in relieving nasal congestion to help you breathe and sleep better. In a sample of 50 patients, what is the probability that exactly 90% of the patients will find this nasal strip effective?

Q: Charlie wishes to investigate the effects of gummy bears which have been claimed to help increase…

A: The null hypothesis claims that there is no difference between the speeds, so the ratio of speed…

Q: A study reported that about 40% of high school students have tried out for a sport at their school.…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of a population…

Q: A shot has a .001 chance of adverse reaction when it is taken.  You must take it every 6 months for…

A: Given: Probability of adverse reaction p = 0.001 Probability of not adverse reaction q = 1-0.001…

Q: A medical researcher claims that 60% of people with shellfish allergies do not have their first…

A: The line of random numbers is 064226149126030872472050368603.

Q: Example: If 25 percent of all patients with high blood pressure have bad side effects from a certain…

A: The probability that a patient with hypertension may have negative side effects from a particular…

Q: In a recent year, the Better Business Bureau settled 75% of complaints they received. You have been…

A: Given:Population proportion (p) = 0.75Sample size (n) = 163

Q: Unilever Inc. recently developed a new body wash with a scent of ginger. Their research indicates…

A: Solution: Let X be the number of men like the ginger scent in the body wash and n be the sample…

Q: The lone bus traveling on Forgettable route is never on time leaving its terminal; it leaves either…

A: From the given information, the lone bus traveling on Forgettable route is never on time leaving its…

Q: A financial talk show host claims to have a 63 % success rate in his investment recommendations. You…

A: here given , A financial talk show host claims to have a 63 % success rate in his investment…

Q: It is known that 17% of people ride public transport without paying for it. We talk to 95 people who…

A: We have given that,  p= 0.17 and N= 95  Then,  We will find P( p̂≥0.22) = ?

Q: In a recent year, the Better Business Bureau settled 75% of complaints they received. You have been…

A: Solution: From the given information, p=0.75 and n=289.

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: What are the chances that an email that has been flagged as spam is actually a non-spam email?

A: Let us define some events A : an email is spam. B : an email is non-spam. E : an email is flagged as…

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: It is known that 17% of people ride public transport without paying for it. We talk to 85 people who…

A: Consider that p is population proportion people, who ride public transport without paying for it.

Q: The probability of flu symptoms for a person not receiving any treatment is 0.058. In a clinical…

A: Given Information: The probability of flu symptoms for a person not receiving any treatment is…

Q: You have recently invested in an electric skateboard. You always wear a helmet and padding to…

A: since n=1000 is large and p=0.005 is small, we can approximate this with Poisson distribution…

Q: . To see if this result is surprising, the class conducts a simulation to estimate the probability…

A:

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: She then conducts a hypothesis test to see whether there is significant evidence to conclude that…

A: The hypotheses can be constructed as: H0: The speeds are the same i.e. no effect from ingesting…

Q: A national survey reported that 31% of adults in a certain country have hypertension (high blood…

A: Let X denote the no.of adults in a certain country have hypertension and it follows binomial…

Q: n a survey of 1,772 U.S. adults, 294 said that they were very confident in the nutritional…

A: We know that  Sample size n= 1772  , total number of confident = 294 ,  X= 4

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: A hotel manager calculates that 12% of the hotel rooms are booked. If the manager is right, what…

A: From the given information,P be the probability that hotel rooms are booked = 0.12.Sample size (n)…

Q: The opera theater manager calculates that 32% of the opera tickets for tonight's show have been…

A: The opera theater calculates that 32% of the opera tickets for tonight's show have been sold. That…

Q: In a genetics experiment on​ peas, one sample of offspring contained 434 green peas and 24 yellow…

A: Obtain the probability of getting an offspring pea that is green.   The probability of getting an…

Q: A national survey reported that 31% of adults in a certain country have hypertension (high blood…

A:

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

A:

Q: Which number of simulation trials would be likely to produce results that are closest to those…

A: As the more trials of an experiment that are performed then the closer the experimental probability…

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: diagnostic

A:

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: n addition to ratings, Mary wanted to know whether customers also purchase a pair of socks when they…

A: Given Information: Sample size (n) = 10 35% of store customers buy a pair of socks when they…

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: Data collected by the Substance Abuse and Mental Health Services Administration (SAMSHA) suggests…

A:

Q: A medical researcher claims that 60% of people with shellfish allergies do not have their first…

A: The random sampling method is one of the sampling method. In this method, the elements of sample are…

Q: Day care centers expose children to a wider variety of germs than the children would be exposed to…

A: Given that,sample one, x1 =1020, n1 =1272, p1= x1/n1=0.8019sample two, x2 =5343, n2 =6238, p2=…

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

A: It is known that, the mean of the sampling distribution of sampling distribution, p-hat is equal to…

Q: At inspection, 40% of built bubble-jet printers are rejected. Calculate the likelihood that the…

A: Given that, at inspection, 40% of built bubble-jet printers are rejected.

Q: You have conducted a series of experiments to reduce the proportion of scrapped battery cells to 1%…

A:

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.