Use the given information to find the number of degrees of freedom, the critical values x and x2, and the confidence interval estimate of o. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Platelet Counts of Women 95% confidence; n = 28, s = 65.2.

You want to examine the effectiveness of a new tutoring program at SWC. A sample of n=9 stats students is used to evaluate t. Each students grade point average is recorded before the program and after the program. The average GPA improved by Mp=0.60 points with s^2 =0.09. the researcher would like to use the sample to estimate how much effect the workshop would have for the entire college population. Which of the following is the 80% confidence interval for these data? A.    μD=0.60 + 0.10(1.397) B.    μD=0.60 +  0.09(1.860) C.   μD=0.60  +  0.01(1.397) D.    μD =0.60 + 0.10(1.860)

df=20  confidence interval = 0.90  find out a critical value for left and right tailed test

Use the information given in the table below to find a 95% Prediction Interval for y when x = 10. n = 20 x_bar = 15 %3D beta0_hat = 53 SSXX = 62 beta1_hat = - 4.5 S = 9 (- 14.79, 30.79) (-0.57, 16.57) (-10.25, 26.25) O (- 4.73, 20.73)

Express the confidence interval (0.037,0.091)in the form of ^p−E<p<^p+E.

If n = 300 and ˆpp^ (p-hat) = 0.95, construct a 99% confidence interval.Give your answers to three decimals <p<

If n = 520 and ˆpp^ (p-hat) = 0.55, construct a 90% confidence interval.Give your answers to three decimals                < p <

If n = 320 and ˆpp^ (p-hat) = 0.45, construct a 90% confidence interval.Give your answers to three decimals    < p <