Question
Find the value of the test statistic z.
 
The claim is that the proportion of drowning deaths of children attributable to beaches is more than 0.25, and the sample statistics include n = 647
drowning deaths of children with 30% of them attributable to beaches.

Expert Answer

1 Rating

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Math
Statistics

Hypothesis Testing

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: A classic counting problem is to determine the number of different ways that the letters of "differe...

A: According to the principle, if there are n objects with r1 objects of one kind, r2 objects of anothe...

Q: Will you show me step by step how to answer this?

A: The z-value corresponds to the 74th percentile is shown in the standard normal distribution table.Ma...

Q: Ackerman and Goldsmith (2011) found that students who studied text from printed hardcopy had better ...

A: The hypotheses to be tested are:H0: μ = 81.7, that is, the average score of entire class is 81.7;Ver...

Q: 1-Var-Stats     x =79     Σ x=2291     Σx2 =182,361     Sx=7     σx=6.878251582  ...

A: It is given that the sample mean and standard deviation are 79 (=2,291/29) and 7.

Q: Number 6.

A: 6.a.The probability that the sample mean will be greater than 50 is obtained below:From the given in...

Q: Problem 29 d

A: The null and alternative hypotheses are given below:H0: µ = 21.62Ha: µ ≠ 21.62Procedure to find samp...

Q: I'm studying for an exam tomorrow, and I keep getting stuck on the same section of problems, no matt...

A: The test is randomized, so, the answers will vary, one of the possible answers is given below:In thi...

Q: Please show ti 84 steps

A: Given information:Here, the mean change in score corresponding to Math is x-bar=18; standard deviati...

Q: A certain snack vending machine dispenses the incorrect item, on average, 4.2 times every day. Assum...

A: The snack vending machine dispenses the incorrect item on average 4.2 times per day.Thus,

Q: Suppose that you randomly selected 23 adults. Assume 20% of the population smoke.  Round all answers...

A: It is given that the random variable X, number of smokers follows a binomial distribution with n=23 ...

Q: A manufacturer of a chocolate candies uses machines to package candies as they move along a filing l...

A: It is given that sample mean and standard deviation are 8.159 and 0.051, respectively.The test hypot...

Q: An automobile manufacturer finds that 1 in every 2500 automobiles produced has a particular manufact...

A: It is given that 1 in every 2,500 automobiles has a defect. Therefore, probability of getting a defe...

Q: The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget...

A: It is given that the widget weights follows normal distribution with mean of 48 and standard deviati...

Q: rosoft Edge atic/nb/ui/evo/index.html?deploymentid-589573205424674386703380718elSBN-9780357035108&id...

A: Given Datadfbetween = 2dfwithin = 30Degrees of freedom of treatments is given byK-1 = 2K represents ...

Q: Given a population where p = 0.10, find the standard deviation of the samping distribution when n = ...

A: It is given that p is 0.10 and n is 2,000.

Q: I have to draw a P-Value graph using variables I calculated in a Chi-square test using Phstat in Mic...

A: Given Chi square test,Critical value = 12.59test statistic = 5.61p value = 0.47In chi square test th...

Q: Assume that x has a normal distribution with the specified mean and standard deviation. Find the ind...

A: Click to see the answer

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14.4 year...

A: Given information:Mean, µ=14.4Standard deviation, σ=3.8Sample size, n=23

Q: The Student Monitor surveys 1200 undergraduates from 100 colleges semiannually to understand trends ...

A: Consider X be a random variable which follows normal distribution indicating the time spent per week...

Q: What is a P value?

A: The p-value is also called as probability value.

Q: The Capital Asset Pricing Model (CAPM) is a financial model that assumes returns on a portfolio are ...

A: It is given that the mean and standard deviation are 14.7 and 33, respectively.

Q: An automobile manufacturer finds that 1 in every 2000 automobiles produced has a particular manufact...

A: It is given that n =5,000 and p = 0.0005 (=1/2,000).The probability mass function of binomial distri...

Q: Each of the following graphs show the relationship between two variables. Determine the Pearson prod...

A: Scatter plot for variable 1 Vs variable 6: There exists no linear relationship between the variables...

Q: Scores on a certain test are normally distributed with a variance of 90. A researcher wishes to esti...

A: According to the provided information,

Q: An automobile manufacturer finds that 1 in every 2000 automobiles produced has a particular manufact...

A: From the given information,An automobile manufacturer finds that 1 in every 2000 automobiles produce...

Q: Please see picture

A: Solution:1.The expected value of X is obtained below:

Q: What is the minimal sample size needed for a 95% confidence interval to have a maximal margin of err...

A: Given confidence interval 95%.maximal margin of error = 0.1.The critical Z score for 95% confidence ...

Q: For a normal population with a mean of m=80 and a standard deviation of 10, what is the probability ...

A: It is given that the mean and standard deviation are 80 and 10, respectively.

Q: Height and weight are two measurements used to track a child’s development. The World Health Organiz...

A: It is given that mean and standard deviation are 10.2 and 0.8, respectively.

Q: Automobile repair costs continue to rise with the average cost now at $367 per repair.† Assume that ...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

Q: #3: Let Z bee normally distributed with mean 0 and variance 1. Let Z1,..., Zn be an i.i.d. random sa...

A: Solution:3.a. The moment generating function of Z2 is obtained below:From the given information, z b...

Q: The ages​ (in years) of a random sample of shoppers at a gaming store are shown. Determine the​ rang...

A: Hi, here the data is repeated twice. Hence, consider the below data for further calculations.Data is...

Q: The mean amount of time it takes a kidney stone to pass is 13 days and the standard deviation is 4 d...

A: It is given that the mean and standard deviation are 13 and 4.

Q: Political survey- A political analyst found that 43% of 300 randomly seleted republican voters feel ...

A: It is given that p hat is 0.43 and sample size is 300. The confidence level is 0.95.

Q: Use the given minimum and maximum data​ entries, and the number of​ classes, to find the class​ widt...

A: Solution:The width of each class is obtained below:From the given information, minimum is16, maximum...

Q: Find the area under the standard normal distribution to the left of z=0

A: It is givne that the z-score is 0.

Q: A certain flight arrives on time 90 percent of the time. Suppose164 flights are randomly selected. U...

A: Hello welcome! According to our principles cannot answer more than three subparts in any question. S...

Q: Please see the picture. I asked this question before and it was answered but it was completely blank...

A: Note:Hey there! Sorry for the inconvenience. There must have been a technical issue. Hope you find t...

Q: A scrable players scores an average of 365 points per game with a standard deviation of 41. What is ...

A: From the given information,x (score) is the random variable that follows normal distribution with me...

Q: Please show TI 84 steps

A: Computation of mean and standard deviation:Here, n=100.The mean and standard deviation is calculated...

Q: A softball pitcher has a 0.626 probability of throwing a strike for each curve ball pitch. If the so...

A: It is given that the probability of throwing a strike for each curve ball pitch is 0.626. The softba...

Q: In 2008, the Detroit Lions set an NFL record by losing all 16 regular season games. Suppose that the...

A: It is given that n =16.Here, probability of winning an individual game is 0.10.

Q: At a dog show, there are 26 tickets in a raffle cup for the basket I want (including mine).  What is...

A: The total number of tickets are 26 and only one ticket per person in the cup is allowed.

Q: novel pages-  a random sample of 25 novels has a standard deviation of 9 pages. Find the 95% confide...

A: The sample standard deviation is 9.The sample size is 25.

Q: 1. Given the data set: {3, 5, 6, 9, 4,7,4,2,3,9, 1, 3, 8} provide the following rounded to two decim...

A: Hey, since there are multiple questions posted, we will answer first question’s three sub part quest...

Q: The age of children in kindergarten on the first day of school is uniformly distributed between 4.73...

A: Let X be the random variable uniformly distributed between 4.73 and 5.75 seconds.Denote X as the age...

Q: the following display from a TI-84 plus calculator presents a 95% confident interval. zinterval(29.8...

A: It is given that the 95% confidence interval is (29.856, 39.608).

Q: Over the past 100 days, the price of a certain stock went up on 60 days and went down on 40 days. Ex...

A: Any statistical report should provide with the necessary values along with the conclusion, so that t...

Q: Political Survey- A political analyst found that 43% of 300 randomly selected republican voters feel...

A: It is given that p hat is 0.43 and sample size (n) is 300. The confidence level is 0.95.

Q: Working with the Concepts 51. Netflix: A study conducted in 2015 by the technology company Rovi (now...

A: Given dataHypothesized mean = 19.3Population Standard deviation = 8Sample mean = 21.5Sample size n =...