+1-415-670-9189
info@expertsmind.com

Get Solution

What are the mean and standard deviation of the sample
Course:- Basic Statistics
Reference No.:- EM1316332

 Tweet Expertsmind Rated 4.9 / 5 based on 47215 reviews.
Review Site
Assignment Help >> Basic Statistics

Find the probability for Normal distribution.

ACT scores of high school seniors. The scores of high school seniors on the ACT college entrance examination in 2003 had mean JL = 20.80 and standard deviation (J = 4.80. The distribution of scores is only roughly Normal.

(a) What is the approximate probability that a single student randomly chosen from all those taking the test scores 23 or higher?

(b) Now take an SRS of 25 students who took the test. What are the mean and standard deviation of the sample mean score x of these 25 students?

(c) What is the estimated probability that the mean score x of these students is 23 or higher?

(d) Which of the two Normal probability calculations in (a) and (c) is more accurate and Why?

Minimize

Ask Question & Get Answers from Experts
Browse some more (Basic Statistics) Materials
 Inference Concerning the Difference Between Two Population or Treatment Means Using Paired Samples Independent samples: Two samples for which the individuals. Consider the instrumentation amplifier of Fig. 2.20(b) with a common-mode input voltage of +3 V (dc) and a differential input signal of 100-mV peak sine wave. Let 2R1 = 2 kΩ A logistic regression model was used to assess the association between CVD and obesity. P is defined to be the probability that the people have CVD. Nationwide, the average waiting time until a electric utility customer service representative answers a call is 210 seconds. The Gigantic Kilowatt Energy Company randomly sa Construct a contingency table for the relationship between degree of anger and the incidence of heart disease.- Among those with no anger symptoms, what percentage had coronar Perform all pairwise comparisons among the three programs, using a Tukey adjustment and an overall significance level of 0.05, then interpret all your results. Your boss is a member of the library-site selection committee. She is not perfectly satisfied with the assessments shown in the table. Specifically, she wonders to what exte Calculate an estimate of the difference between true average blood lead levels for male and female workers in a way that provides information about reliability and precision