What would be the critical value for a left-tailed test with α = 0.01? (Remember to use the z-score table)

Q: what will be the value of X at the z score =-3 given, mean=10 and standard deviation =2?

A: The z-score of a random variable X is defined as follows: z = (X – µ)/σ. Here, µ and σ  are the mean…

Q: sample of n = 4 scores is selected from a population with μ  = 100 and s = 20. If the sample mean is…

A: Given information: n = 4  μ  = 100  s = 20.  sample mean is M =110

Q: You have a sample of test scores, the sample mean of the test scores is 70.5, and the standard…

A: Determine the z-score for an individual score of 85. The z-score for an individual score of 85 is…

Q: You just finished statistics class and are eager to collect and analyze your own data! You run out…

A: Since, it is given that,student just finished statistics class to  collect data on the average score…

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

A: Let p be a variable denoting the population proportion of women over 40 who regularly have…

Q: For data that is not normally distributed we can't use z-scores. However, there is an equation that…

A: a. Required percentage will be given by as follows using chebychev's inequality:…

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

A:

Q: What information is provided by the sign (+/–) of a z-score? What information is provided by the…

A: Let, the dataset scores have a mean µ and standard deviation σ. Then the z score of a given score ,…

Q: An important indicator of lung function is forced expiratory volume (FEV), which is the volume of…

A: Given that Population mean=3000 Standard deviation =400  We have to find the correct statement…

Q: A sample of n = 5 scores has a mean of M = 9. What is EX for this sample? %3D %3D

A: Given: Sample size = n = 5  Mean = M = 9 We have to find ∑X for the given data.

Q: How do you find z-score with only a standard deviation and the simple mean? They aren't providing…

A: Let us assume we have a population which is normally distributed with mean µ and standard deviation…

Q: What is the difference in what a small P-value tells us compared to a high P-value?

A: P Value is a method to determine the significance of the result from a data. It basically tells you…

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: You are conducting a study to see if the accuracy rate for fingerprint identification is…

A: It is given that the test statistic is 1.182.

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 =======================

Q: developed. took the drug for 3 months. Blood tests showed that x 8.4 with sample standard…

A: From the provided information,

Q: Pat's z-score on an exam is -1.23. In a normally distributed population with u of 25 how many…

A: Provided information is ; Pat's  z-score = -1.23 population mean(μ) = 25  we know that ; z-score…

Q: You are conducting a study to see if the accuracy rate for fingerprint identification is…

A: Solution: State the hypotheses. Null hypothesis: That is, the accuracy rate for fingerprint…

Q: When you use the two-standard-deviations F-test, what assumption must be met by the variable under…

A:

Q: Find the t-value for a=0.005 one-tailed test with n=25.

A: Computation of degrees of freedom:It is given that α=0.005; n=25.Also, it is given that the test is…

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: You are performing a left-tailed test with test statistic z=−3.3, find the p-value to 4 decimal…

A: Given: Test statistic (z) = -3.3 Test is left tailed

Q: Calculate the z-score for a raw score of 10, if the distribution's mean and standard deviation are 5…

A:

Q: A random sample of 46 adult coyotes in a region of northern Minnesota showed the average age to be x…

A:

Q: The sample mean x (with a bar above) is the best point estimator of the sample mean u(mu) True or…

A: Sample mean: The sum of the all observations of sample divided by the total number of observations…

Q: Using z-scores, a population with u = 37 and o = 6 is standardized so that the new mean is u = 50…

A: Given

Q: In an exam for a statistics class, the class average is 68 with a standard deviation 4. If a student…

A: Given mean μ= 68, standard deviation σ= 4 Let X: score of the students = 75

Q: "t(7595) = 2.62, p = .01" How many standard deviations apart are the two means of this t-test?

A: We have to find distance between means.

Q: What is the ∑X for this sample

A: A sample of size is denoted by n. mean is nothing but the average of given sample observations. Here…

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: 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: In 1988, on the math SAT, the males taking the exam averaged about 500, while the females averaged…

A: From the provided information,

Q: Mean 2, x is 5 and z score is 4 find standard deviation

A: Given ,mean(μ)=2Z-score=4and X=5

Q: Assume that an intelligence test scores are distributed normallt with a mean of 100 and a standard…

A: Standard normal distribution: The standard normal distribution is a special case of normal…

Q: For a population with population mean 80 and standard deviation10, what is the z-score corresponding…

A:

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: Calculate the z-score for a raw score of 10, if the distribution's mean and standard deviation are 5…

A: Given X = 10 μ= 5 S= 4