Construct a 95% confidence interval for u,-2. Two samples are randomly selected from each population. The sample statistics are given below. 1= 40 n2 = 35 x 12 X2 = 13 S1=2.5 S2 = 2.8 O A. (-2.209, 0.209) O B. (-1.673, 1.892) O C. (-1.968, 1.561) O D. (-2.230, 0.230)

Q: Use the Student's t distribution to find t, for a 0.95 confidence level when the sample is 27.

A: sample size=n=27 Degree of Freedom=n-1=27-1 =26 Confidence level is 0.95 Therefore the Level of…

Q: Find the indicated margin of error. Out of 260 trials, 150 turned out positive. Find the margin of…

A: It is given that the sample size (n) is 260 and the number of positive trials (x) is 150.

Q: Determine and d H =0 % -0 from the given parameters of the population and sample size p=90, o = 24,…

A:

Q: hat is the value of N in a sample with SS = 80 and a variance of 8? a. 4 scores b. 10 scores c. 12…

A: GIVEN DATA  ss  = 80var(x) = 8N = ?

Q: Calcium is essential to tree growth because it promotes the formation of wood and maintains cell…

A: We want to find the 95% confidence interval  tc=2.262, at alpha=0.05 with df=9

Q: Find the indicated margin of error. Out of 330 trials, 150 turned out positive. Find the margin of…

A:

Q: Suppose you select a random sample of N=81, and find X = 50, and s = 9.9. Determine the 99%…

A: Given Mean=50 Standard deviations=9.9 n=81

Q: Find the raw score for 99% with a population mean of 29 and σ of 4

A:

Q: find the margin of error for a sample mean, given n=16, s=4, Xbar=17. for a 95% confidence interval.

A: The margin of error for sample mean is given by,

Q: Determine the sample size for the estimate of u if the margin of error E= 0.10, o=0.85, and the…

A: Given,Margin of error, E = 0.10Population standard deviation, σ = 0.85Confidence level, C = 99% =…

Q: Determine and o from the given parameters of the population and sample size. p= 87, o = 13, n= 35 口

A: The mean of the sampling distribution of the sample mean is given by:

Q: The data show the number of hours of television watched per day by a sample of 28 people. Use…

A: Arranging Observations in the ascending order, We get…

Q: Construct the confidence interval for the population mean . C=0.98, x=15.3, = 10.0, and n=75

A: The Confidence Interval formula is X  ±  Z s √(n) Where: X is the mean Z is the Z-value…

Q: Find the margin of error for each data from certain populations. 3. 45, 56, 61, 88, 91, 64, 38, 79,…

A: Given data: Confidence leval = 90% To find margin of error

Q: A doctor is concerned that a drug treatment causes people to run a fever.  She recruited n = 50…

A: Given Data: n=50   There is only one sample

Q: FIND t a n = 15 for the 98% confidence interval for the mean.

A: Provided information that, n=15 Alpha (α)=1-0.98=0.02 α/2=0.01

Q: Lower %3D

A:

Q: Find the standardized test statistic, z to test the claim that p, = p2. The sample statistics listed…

A: The sample proportions are: The value of the pooled proportion is computed as :

Q: Scott wants to find a 95% confidence interval for the average GPA for Allegany College of Maryland…

A:

Q: Construct a 99​% confidence interval of the population proportion using the given information.…

A:

Q: 6) Find the t, value from Table for the indicated confidence level and sample size. 95% confidence…

A: a) 95% confidence level and n = 35 Degree of freedom = 35 – 1 = 34 Significance level(α) = 1-0.95 =…

Q: Use the confidence interval to find the margin of error and the sample mean. (12, 20) O E = 4, X =…

A: confidence interval for mean : (12,20)

Q: n = 6 n = 6 n = 6 N = 18 M = 1 M = 2 M = 6 G = 54 SS = 60 SS = 65 SS = 40 ∑X² = 411   Calculate the…

A: Given data isn=6M=1SS=60

Q: 879, P-vaIue Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs…

A: For the best predicted value, first we will see whether the two variables (x and y) are…

Q: t test for Independent Means  Professor Smith hypothesizes that type of TV show impacts people’s…

A: H0:μ1=μ2H1:μ1≠μ2

Q: Find the estimated standard error for the sample mean for n = 8 and SS= 5042.

A: Given n=8, SS=5042

Q: Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs of…

A:

Q: Construct a 90​% confidence interval of the population proportion using the given information.…

A: x=240  n=300  p= 240/300 = 0.8 q = 1-p = 1-0.8 = 0.2

Q: instructor thinks that the mean score is higher. She samples 10 statistics students and obtains the…

A: It is given that:

Q: Find the sample​ size, n, needed to estimate the percentage of adults who have consulted fortune…

A:

Q: whoaccess their bank statements online. Denoting the population propotions by Pm and Pw, a…

A: Given that The values of the test statistic is found to be z = 0.784, and the p-value for the test…