PLEASE SHOW WORK FOR EACH ANSWER
PLEASE SHOW WORK FOR EACH ANSWER a. 6. The ACT Composite scores have an average of...
6. The ACT Composite scores have an average of 20.8 with a standard deviation of 5.8 (this is actually true). A sample of 64 scores is selected. a. What is the probability that the sample mean will be larger than 24.1? b. What is the probability that the sample mean will be less than 16.6? c. What is the probability that the sample mean will be between 20.8 and 26.3? d. What is the probability that the sample mean will...
The ACT Composite scores have an average of 20.8 with a standard deviation of 5.8 (this is actually true). A sample of 64 scores is selected. a. What is the probability that the sample mean will be larger than 24.1? b. What is the probability that the sample mean will be less than 16.6? c. What is the probability that the sample mean will be between 20.8 and 26.3? d. What is the probability that the sample mean will be...
The ACT Composite scores have an average of 20.8 with a standard deviation of 5.8 (this is actually true). A sample of 64 scores is selected. a. What is the probability that the sample mean will be larger than 24.1? b. What is the probability that the sample mean will be less than 16.6? c. What is the probability that the sample mean will be between 20.8 and 26.3? d. What is the probability that the sample mean will be...
2 3 + . . The ACT Composite scores have an average of 20.8 with a standard deviation of 5.8 (this is actually true). A sample of 64 scores is selected. a. What is the probability that the sample mean will be larger than 24.1? b. What is the probability that the sample mean will be less than 16.6? What is the probability that the sample mean will be between 20.8 and 26.3? d. What is the probability that the...
6. The ACT Composite scores have an average of 20.8 with a standard deviation of 5.8 (this is actually true). A sample of 64 scores is selected. a. What is the probability that the sample mean will be larger than 24.1? b. What is the probability that the sample mean will be less than 16.6? What is the probability that the sample mean will be between 20.8 and 26.32 d. What is the probability that the sample mean will be...
You are the extremely brilliant business statistician hired to analyze the data at Elliot's World o' Tacos. Elliot wants to make sure that the high school kids he hired are putting the right amount of cheese (2oz) on the tacos. Too much cheese and he will lose money! Too little cheese and people complain. The tacos that should have 2 oz of cheese actually vary in amount with a standard deviation of 0.15 ounces. Assume the cheesiness of the tacos...
The mean ACT composite score in a recent year is 20.8. A random sample of 36 ACT composite scores is selected. What is the probability that the mean score for the sample is (a) less than 21.6, (b) more than 19.8, and (c) between 20.5 and 21.5? Assume σ=5.6.
The scores of individual students on the American College Testing (ACT) composite college entrance examination have a normal distribution with mean 17.3 and standard deviation 5.4. (a) What is the probability that a single student randomly chosen from all those taking the test scores 25 or higher? (b) Now take an SRS of 67 students who took the test. What are the mean and standard deviation of the average (sample mean) score for the 67 students? μ = σ =...
Use the normal distribution in 18. ACT Composite Scores (a) What percent of the ACT composite scores are less th (b) Out of 1500 randomly selected ACT composite s scores, about how would you expect to be greater than 21?
The composition scores of individuals on the ACT college entrance examination in 2019 have mean 20.8 and standard deviation 5.8. Use this information, answer the following questions: (Round z-score values to 2 decimal places) (a) Now suppose that the composition scores are normally distributed, what is the probability that a single student randomly chosen from all those taking the test scores higher than 22? (6 points) (b) (Ignore part a) Now suppose that we take a simple random sample of...