e. What conditions are required for the test results to be valid? Select all that apply. A. The sample was selected from a population with a distribution that is highly skewed. B. The population standard deviation is known. C. The sample was random. D. The sample was selected from a population with a distribution that is approximately normal. E. No assumptions are required for this test.

Hi, please answer the question in the photo in the white space! thank you :)

When a researcher knows the population mean and standard deviation for the general (untreated) raw score distribution, what type of inferential test can be used to determine the effectiveness of a treatment (the independent variable)? a. An inferential Z score test b. A one sample t test c. A two independent samples t test d. a Pearson correlation

1. state the distribution to be used for the test 2. what is the P- VAlue  3. Draw a labeled and shaded diagram

Suppose​ 30% of the people in your town talk on their cell phones and drive at the same time. If you stood on a busy street corner and watched 50 people drive​ by, what is the standard deviation of the model you would use for the sample proportion you​ observe? Choose the correct answer below.     A. About 0.065   B. 50   C. 0.30   D. Not enough information is given to answer the question.

In a job fair, 3000 applicants applied for a job. Their mean age was formed to be 28 with a standard deviation of 4 years. a. Draw a normal curve distribution showing the z scores and the raw Scores. b. How many applicants are below 20 years old? c. How many applicants are above 32 years old? d. How many have ages between 24 and 32 years? e. Find the age such that 75% is below it.

The mean number of pets owned by the population of students at a large high school is 3.2 pets per student with a standard deviation of 1.7 pets. A random sample of 16 students will be selected and the mean number of pets for the sample will be calculated. What is the mean of the sampling distribution of the sample mean for samples of size 16 ? 1.7 3.2 3.2 V16 1.7 16 1.7 16

A teacher gives the following assignment to 200 students: Check the local newspaper every morning for a week and count how many times the word "gun" is mentioned on the "local news" pages. At the end of the week, the students report their totals. The mean result is 85, with a standard deviation of 8. The distribution of scores is normal. a. How many students would be expected to count fewer than 70 cases? Show the solution and draw the normal curve b. How many students would be expected to count between 80 and 90 cases? Show the solution and draw the normal curve c. How many students would be expected to count higher than 60 cases? Show the solution and draw the normal curve

The time need to complete a math examination is bell-shaped with a mean of 90 minutes and a standard deviation of 15 minutes. a. Assume that the class has 180 students and that the examination period is 120 minutes in length. How many students do you expect will not be able to complete the exam in the allotted time? Answer = Round up to the nearest integer b. A student is classified as extremely efficient if the amount of time spent on exam is the lower 16% for the distribution. What time must the student finish the exam in order to be classified as extememly efficient? Answer = E min Round to the nearest integer -> I| |

Use the Central Limit Theorem to find the mean and standard error of the mean of the indicated sampling distribution. The monthly rents for studio apartments in a certain city have a mean of $1,020 and a standard deviation of $170. Random samples of size 60 are drawn from the population and the mean of each sample is determined. Round the answers to the nearest hundredth. O A. $1,020.00, $2.83 OB. $1,020.00, $21.95 O C. $131.68, $170.00 O D. $131.68, $21.95 View Instructor Tip Calculator Next PType here to search 70°F Clear ^ O 4) 6:46 PM 直 0 3) 10/8/2021 10/05/17 DG521 AU F7 F8 PrtSc Delete F10 F11 F12 Insert & * Backspace 4. 8. 6 G K 15 工 Pl // +