You are conducting a study to see if the probability of a true negative on a test for a certain cancer is significantly less than 76%. With HA : p < 76% you obtain a test statistic of z = −2.14. Find the p-value accurate to 4 decimal places. p-value = P(z < -2.14) = I need help

Q: What are the null and alternative hypotheses? Calcium is essential to tree growth. In 1990, the…

A: The data shows the calcium for tree growth of 8 precipitation dates in 2018.

Q: Using the values that you generated in the first step of this assignment, a person with a z-score of…

A:

Q: You are conducting a study to see if the proportion of men over 50 who regularly have their prostate…

A: For a left-tailed test, at z = - 1.875 the p-value is p-value = P(Z≤-1.875)=0.0304     Since…

Q: ACT Scores A survey of 1000 students nationwide showed a mean ACT score of 21.4. A survey of 500…

A: Let x1 be the nationwide ACT score. and x2 be the Tennessee scores. Using the usual notation,…

Q: In the library on a university campus, there is a sign in the elevator that indicates a limit of 16…

A:

Q: A researcher wants to know whether people who own dogs are less likely to visit their doctor. A…

A: n=8x1=7.8750x2=4.3750sd1=2.47487sd2=2.38672 The test statistic is…

Q: A grocery store manager wants to know if displaying cranberries near the entrance to the store…

A: P1 : Proportion of shoppers who buy Cranberries when they are near the store entrance. P2 :…

Q: You are conducting a study to see if the probability of catching the flu this year is significantly…

A: It is a left tailed test.

Q: The IQ scores and English test scores of fifth grade students a regression line y = -26.7 +0.9346s,…

A:

Q: 22. In a population distribution, a score of X = 56 corresponds to z = -0.40 and a score of X = 70…

A: When X=56 then z=-0.40When X=70 then z=+1.00

Q: Suppose we wish to test whether the mean amount of lead in drinking water in UAE is less than 15…

A: Claim : The mean amount of lead in drinking water in UAE is less than 15 mcg/L.

Q: IQ scores form a normal distribution with a mean of μ =26 and a standard deviation of σ = 15. Find…

A:

Q: For a normal population with a mean of u = 60 and a standard deviation of o=12, what is the…

A: Mean : µ = 60 Standard deviation : σ = 12 M = 45 n = 4 We have to calculate : Sample mean is greater…

Q: How do I do this problem? What is the formula?

A: From the given information, the IQ scores of adults are normally distributed with a mean 100 and…

Q: 21. Let x be the number of candies inside a 1-pound candy box. If in a randomly selected boxes, the…

A: 21) Given probability distribution table is,x100105110P(x)0.030.910.06Using formulas,Mean, Variance,…

Q: High levels of cholesterol in the blood increase the risk of heart disease. For teenage boys, the…

A: Given that: X is normal Distributed with mean µ = 151.6 and standard deviation σ = 25.0 By using…

Q: The director of research and development testing and new drugs she wants to know if there's evidence…

A: Test statistic:Denote μ as the claimed mean; μ = 384. In a random sample of n = 79, the sample mean…

Q: statistics 5.3 Find the z-scores for which 97% of the distribution's area lies between -z and z.…

A: From the standard normal distribution table, if P(-z&lt;Z&lt;z)=0.97…

Q: (d) Find the p-value. (Round to three or more decimal places.) П (e) At the 0.01 level of…

A:

Q: (d) Find the sample size necessary for a 95% confidence level with maximal margin of error E = 1.14…

A: d) standard deviation(σ)=1.81 Margin of error(E)=1.14 confidence interval=95%

Q: Hw 14 X~N(12,3) Find the 87.7 percentile X.

A:

Q: The null hypothesis is that the laptop produced by HP can run on an average 120 minutes without…

A: Given,sample size(n)=60sample mean(x¯)=124population standard deviation(σ)=25Null hypothesis:…

Q: A lake is famous for cutthroat trout.  Suppose a friend tells you that the average length of the…

A:

Q: The null hypothesis that there is no relationship between the amount of coffee consumption and GPA…

A: from given data we have : The null hypothesis that there is no relationship between the amount of…

Q: The literacy rate = 28.1%  15 random people are chosen X=number of people that are literate what…

A:

Q: 3) The following data visited a clinic on a particular day: A have Number of patients Waiting time…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: Let X be a random variable that represents red blood cell count (RBC) in millions of cells per cubic…

A: 4.1, 4.2, 4.5, 4.2, 4.6, 4.5

Q: 7.52 Forest management. Forest rangers wanted to better understand the rate of growth for younger…

A: From the provided information,Confidence level = 99%

Q: A local news claims that 40% of vehicles on the freeways are vans or SUV's. I go to a nearby freeway…

A: The hypotheses for the test are given below. Null hypothesis: H0: p = 0.40 Alternative hypothesis:…

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe…

A: It is given that confidence level is 0.99, the standard deviation is 37.4, and margin of error E is…

Q: It is supposed that values of pH in rainfalls are normally distributed. You know that population…

A: Given Standard deviation=0.6 Margin of error=0.2 At 95% confidence level of z value Z=1.96

Q: Scores on a dental anxiety scale range from 0 (no anxiety) to 20 (extreme anxiety). The scores are…

A: According to the given information, we have Mean = 11 Standard deviation = 4 The distribution is…

Q: Acid rain is the rain with a pH value less than 5.7. It caused by the reaction of certain air…

A: Given information: The specified value for the population mean is μ=5.7. The sample size is n=50.…

Q: Date Find the value ofc which Staisfies all Condition the Valve thetem fln) -u5-3M+2 Elsz]. mean

A: Given,          fx=x5-3x+2 ;  -1,2

Q: In the Physician's Health Study, 22,071 male physicians participated in a study to determine whether…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: You are performing a left-tailed test with test statistic z=-0.35, find the p-value to 4 decimal…

A: Since we have to find p-value. So use z-test statistics. So from excel using formula we can…

Q: The use of the standard normal distribution for constructing a confidence interval estimate for the…

A: We have to find out correct option for given data

Q: t-value ? t-critical?

A: Obtain the value of the test statistic. The value of the test statistic is obtained below as…

Q: A population of values has a normal distribution with u = 235.3 and o = 74.1. You intend to draw a…

A: Given : μ=235.3σ=74.1n=56

Q: 4. From z = -3.02 to z = 1.0 5. From z = 2.09 to z = 3.0 6. z > 1.34 7. z -1.11 9. z < -1.11 10. To…

A:

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

A: We have given that n = 470p̂ = 0.58p = 0.5 The null and alternative hypothesis are H0 : p =  0.5H1:…

Q: Refer to the figure at the right. At a=0.10, can you reject the claim that the proportion of 18 to…

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.