You are conducting a study to see if the probability of catching the flu this year is significantly less than 0.24. Thus you are performing a left-tailed test. Your sample data produce the test statistic z=−2.554. Find the p-value accurate to 4 decimal places. Since you are given the test statistic, you would need to find the probability corresponding to the appropriate region using normalcdf. p-value =

Q: A mandatory competency test for high school sophomores has a normal distribution with a mean of…

A: Suppose a random variable X, defines the scores in competency test for high school sophomores.

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A:

Q: You are conducting a study to see if the probability of a true negative on a test for a certain…

A: The null and alternative hypothesis is, The type of test is left tailed test The value of test…

Q: You are conducting a study to see if the proportion of women over 40 who regularly have mammograms…

A:

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

A:

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

A: given data  right tailed test claim : p>0.2 Z = 1.699 p value = ?

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

A:

Q: Scores on the Critical Reading part of the SAT exam in a recent year were roughly Normal with mean…

A:

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

A: H0: p = 0.49 H1: p ≠ 0.49 =======================

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A: Given, Claim: The average height differs between the sexes. The test is two tailed. Given test…

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Q: X is a normally distributed variable with a mean of 200 and a standard deviation of 30. What is the…

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Q: Scores on the Critical Reading part of the SAT exam in a recent year were roughly Normal with mean…

A: From the provided information, Mean (µ) = 496 Standard deviation (σ) = 115 X~N (496, 115) Sample…

Q: The mean points obtained in an aptitude examination is 111 points with a variance of 400.   What…

A: The objective of this question is to find the probability that the mean of a sample of 79 exams…

Q: A sample of size 126 will be drawn from a population with mean 26 and standard deviation 3. Use the…

A: Here we have, Sample size: n= 126Population mean: μ =26Population SD: σ = 3   To find: 1.  P( x¯…

Q: The waiting time for a bus has a uniform distribution between 2 and 11 minutes. What is the 75th…

A: The objective of this question is to find the 75th percentile of a uniform distribution. A uniform…

Q: You are conducting a study to see if the proportion of women over 40 who regularly have mammograms…

A: Answer:- Given, The test statistic is, z = 2.61, The test is right-tailed test.  We use standard…

Q: The mean score on a physics test is 75% with standard deviation 6.5%. Suppose that the scores in the…

A: The problem provides us with the following values:Mean (μ) = 75%Standard deviation (σ) = 6.5%Score…

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Q: What is the z-score of x = 11, if it is 2.5 standard deviations to the left of the mean?

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Q: The mean weight of an adult is 62 kilograms with a variance of 144. If 195 adults are randomly…

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

A: Given that, You are conducting a study to see if the probability of catching the flu this year is…

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

A: claim:P≠0,37two tailed test  for singal proportion teat statitics z=-1.893p value =?

Q: Scores on the Critical Reading part of the SAT exam in a recent year were roughly Normal with mean…

A: The mean is 496 and the standard deviation is 115.

Q: You obtained IMDB scores of all movies and see that they are normally distributed with a mean of 6.7…

A:

Q: The mean number of words per minute (WPM) read by sixth graders is 95 with a variance of 196. If…

A: According to the provided information,

Q: mandatory competency test for high school sophomores has a normal distribution with a mean of  425…

A: Given that.   X~N( μ , ?)   μ=425     , ?=83   Z-score =( x - μ )/?

Q: The mean score on a physics test is 75% with standard deviation 6.5%. Suppose that the scores in the…

A: The problem provides us with the following values:Mean (μ) = 75%Standard deviation (σ) = 6.5%Score…

Q: What is the probability that a randomly selected book has fewer than 141 pages if the mean is 193…

A: Given that The mean= 193 The standard deviation = 26 To find the probability that a randomly…

Q: What is the z-score of x = 9, if it is 0.133 standard deviations to the left of the mean?

A: Given X=9,

Q: A mandatory competency test for high school sophomores has a normal distribution with a mean of…

A: Assume a random variable X, defines the scores obtained in competency test for sophomores of high…

Q: Person 1 (X) = 1 hour, z = -0.5 Person 2 (X) = 3 hours, z= 0.5 Person 3 (X) = 4 hours, z= 1 4. Using…

A: The question is about normal dist. Given : Person 1 ( X ) = 1 hr. , z = -0.5 Person 2 ( X ) = 3 hr.…

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A: Given,sample size(n)=8mean(μ)=12.6standard deviation(σ)=2.9

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A: The question is about hypothesis testingGiven :Population mean dividend yield (  ) = 6 % Population…

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

A: Solution: State the hypotheses. Null hypothesis: H0:p≤0.49 That is, the proportion of men over 50…

Q: You are conducting a study to see if the proportion of women over 40 who regularly have mammograms…

A: Given,Test statistic(Z)=2.81H0:P=0.59H1:P>0.59

Q: What is the 25th percentile of a χ2 distribution with 20 degrees of freedom? What symbol is used to…

A: It is an important part of statistics. It is widely used.

Q: The mean points obtained in an aptitude examination is 111 points with a variance of 400.   What…

A: The objective of this question is to find the probability that the mean of a sample of 79 exams…