It is reported that 25% of weddings occur in April. You believe this claimed value is too high, and you find, in a survey of a random sample of 100 couples, that only 18% got married in April.  To conduct a hypothesis test, you compute the following test statistic:  what is the mistake in this? using the picture

Q: Yes. The study shows that there is a statistically significant relationship between playing games…

A: O E (O-E)^2 (O-E)^2/E 735 716.8345 329.9842 0.4603353 205 223.1655 329.9842 1.4786527 450…

Q: A lecturer wants to see if a PowerPoint presentation will change students´ understanding of a…

A: Answer : This is a paired 'to test.

Q: A random sample of 250 physicians shows that there are 40 of them who make at least $400,000 a year.…

A: We have to find value of test statistics.

Q: A random sample of 100 people was taken. Eighty of the people in the sample favored Candidate A. We…

A: Given that , A random sample of 100 people was taken. 80 of the people in the sample favored…

Q: New Authors Established Authors Total Successful 24 100 124 Unsuccessful 60 216 276 Total 84 316 400…

A: The number of values corresponding to a class or observation is defined as the frequency of that…

Q: ecause the course seems too intimidating. The university administra nforms professors that the drop…

A: Let X be the number of persons possessing the given attribute in a sample of size 'n'. Let p denote…

Q: Good credit: The Fair Isaac Corporation (FICO) credit score is used by banks and other lenders to…

A: Solution

Q: Please answer this and provide different scenarios as needed, thank you     A simple random…

A: The data relating to sports was given.

Q: recent study reported that 12% of people toss away about half of what they buy at the grocery store.…

A: From the given information we conduct Z test for proportion.

Q: Four scenarios of statistical studies are given below. Decide which study uses a sample statistic. O…

A: The set or collection of all possible observations is defined as the population.

Q: Imagine you are interested in the effect of violence in the video games kids play and the level of…

A: Given: One is interested in the effect of violence in the video games kids play and the level of…

Q: An airline company would like to know if the average number of passengers on a flight in November is…

A: Null and alternative hypotheses: The hypothesis which is tentatively fixed up under and tested for…

Q: A biology professor claims that, on the average, 15% of her students get a grade of A, 25% get a B,…

A: The number of categories k is 5.

Q: Among the first-year resident students, eight students were randomly selected, and their body…

A: Given: weight at the beginning of the semester (X) End of term weight (Y) 45 52 61 65 62 64…

Q: Claim: Most adults would erase all of their personal information online if they could. A software…

A: From the provided information, The hypotheses are as follow: H0: p = 0.50 H1: p > 0.50

Q: Claim: Most adults would erase all of their personal information online if they could. A software…

A: Denote p as the true proportion of the adults, who would erase all of their personal information…

Q: Part 1 Fill in the missing values in the table. Round your responses for the expected frequencies to…

A: Given Information: 50% of first weddings take place indoors in a church, 30% take place indoors in a…

Q: Explain why the following statement is incorrect. The sample space associated with an experiment is…

A: Given: The given sample space is, S=a,b,c Also, the given probabilities are,…

Q: A medical school claims that more than 28% of its students plan to go into general practice. It is…

A:

Q: State the appropriate null and altemate hypotheses. Ho This hypothesis test is a (Choose one) test.…

A:

Q: In a sample of 500 parts produced by a grinding machine, 396 parts were defective. A test is…

A: given:   Sample size n = 500 Number of defective parts = x = 396

Q: What is the variable of interest? Whether or not a patient is satisfied with the level of care.…

A: The objective of the question is to identify the variable of interest in a given scenario. The…

Q: No Excel solution Sorry :( In a city, according to a 1990 demographic report based on the census…

A: Given: n=28 X~N(μ,σ)

Q: . Suppose a researcher has heard that children watch an average of ten hours of TV per day. The…

A:

Q: Past studies have indicated that 85.6% of all enrolled college students in the U.S are…

A: The provided information are:Sample size (n) = 500Hypothesised proportion (po)=0.856Sample…

Q: A random sample of 300 physicians shows that there are 50 of them who make at least $200,000 a year.…

A: Given,n=300x=50p^=xn=50300=0.1667H0:P=0.20H1:P<0.20

Q: Claim: Most adults would erase all of their personal information online if they could. A software…

A: Given,   Sample size = 437 Sample proportion = 0.60   The null and alternative hypothesis is:

Q: Claim: Most adults would erase all of their personal information online if they could. A software…

A: Given;-   Claim: Most adults would erase all of their personal information online n= 454 56% of them…

Q: According to previous studies, 10% of the U.S. population is left-handed. Not knowing this, a high…

A: From the provided information,

Q: A hospital claims that 40% of its patients request a telephone. you are interested in disproving…

A:

Q: A medical school claims that more than 28% of its students plan to go into general practice. It is…

A: Given n=130 Pcap=39%=0.39

Q: Test at a 5% level of significance whether the PowerPoint presentation makes a difference in the…

A:

Q: According to Crestmont Research, the stock market has been up in 53.7% of all trading days over the…

A: The proportion is 53.7%.