Question

Asked May 13, 2019

Step 1

Let X be the concentration estimate. X follow a normal distribution with mean 5% and standard deviation 0.09 percentage points.

We need proportion of students will obtain a concentraton estimate more than 5.06% = P(X > 5.06).

Here we calculate Z score for X = 5.06 using the below shown formula. Z score is 0.67 for X = 5.06.

P(X > 5.06) = P(Z > 0.67)

Step 2

With reference to below shown Z table the the probability value to the right of Z score 0.67 is 0.2514.

P(Z > 0.67) = P(X > 5.06) = 0.2514

Step 3

Given sample size of 20 students with mean 5% and standard deviation 0.09%. The standard deviaiton of sample will be = σ/√n, where n is the sample size and &sigma...

Tagged in

Q: A random sample of 30 binomial trials resulted in 12 success. Test the claim that the population por...

A: Hey, since there is multiple subpart questions posted, we will answer first three subparts. If you w...

Q: (a) In the random number table, assign the digits 0 through 8 to the event "successful surgery" and ...

A: Total number of digits assigned to event "successful surgery" (0-8) = 9Total number of digits assign...

Q: A population has a mean of 15 and standard deviation of 3. Round the answers to two decimal places a...

A: Let X be the observation. X follows normal distribution with mean μ = 15 and the standard deviation ...

Q: A researcher wants to investigate whether mindfulness training improves ability for employees to not...

A: In an experiment the factor is an explanatory varible which is manipulated by the experimenter. It i...

Q: You are asked to design a study to investigate the effectiveness of the Atkins diet (IV = diet, DV =...

A: Consider the population of all individuals in a particular city. A random sample of 40 individuals i...

Q: A student takes a multiple-choice test that has 20 questions. Each question has five choices. The st...

A: Binomial distribution:It is a discrete probability distribution in which each trials have exactly tw...

Q: Part b, c, d

A: Part b:Denote μ as the true mean breaking strength (after 24 hours) of the new bonding adhesive.The ...

Q: The national average for the number of students per teacher for all U.S. public schools in 15.9 Aran...

A: Confidence interval:The (1-α) % confidence interval for population mean µ, when σ is unknown is give...

Q: The dose-response effect is best described as A. when similar studies produce similar results B...

A: Introduction:The dose-response effect is a measure of the magnitude of the response in the subjects ...