t-Test: Two-Sample Assuming Unequal Variances | ||
x | y | |
Mean | 14.79 | 10.87 |
Variance | 3.5077 | 1.3334 |
Observations | 10 | 10 |
Hypothesized Mean Difference | 0 | |
df | 15 | |
t Stat | 5.6340 | |
P(T<=t) one-tail | 0.0000 | |
t Critical one-tail | 2.6025 | |
P(T<=t) two-tail | 0.0000 | |
t Critical two-tail | 2.9467 |
P-value is LESS... you WILL reject
2. Testing two population means using Excel Aa Aa Consider two independent random variables x and...
The following data represent soil water content (percentage of water by volume) for independent random samples of soil taken from two experimental fields growing bell peppers. Soil water content from field I: x1; n1 = 72 15.2 11.3 10.1 10.8 16.6 8.3 9.1 12.3 9.1 14.3 10.7 16.1 10.2 15.2 8.9 9.5 9.6 11.3 14.0 11.3 15.6 11.2 13.8 9.0 8.4 8.2 12.0 13.9 11.6 16.0 9.6 11.4 8.4 8.0 14.1 10.9 13.2 13.8 14.6 10.2 11.5 13.1 14.7 12.5...
can u clearly show me how to find a sample size (N) , A2, and can you also tell me why we are using an X Chart? Problem 1 A restaurant wants to control kitchen preparation time of dinner meals using an X chart. The process standard deviation is unknown. Each evening a manager takes a random sample of 14 dinner orders and measures and records their kitchen preparation time. Create an X Chart using data in the table below...
Please help with solving this population mean problem. Note: The function STDEV is used for Excel versions 2007 and earlier. For later versions, STDEV was replaced by STDEV.S. However, STDEV can still be used in later versions of Excel. Similarly, TDIST and NORM SDIST were replaced by T.DIST and NORM.S.DIST. 1 AB Vertical Error, x Hypothesis Test about a Population Mean: 0.0101 o Unknown Case 0.0003 0.0029 Sample Size -0.0186 Sample Mean 0.001 Sample Standard Deviation 0.0072 Hypothesized Value -0.0026...
Consider two random variables, X and Y. Let E(X) and E(Y) denote the population means of X and Y respectively. Further, let Var(X) and Var(Y) denote the population variances of X and Y. Consider another random variable that is a linear combination of X and Y Z- 3X- Y What is the population variance of Z? Assume that X and Y are independent, which is to say that their covariance is zero.
eBook Video Exercise 10.1 (Algorithmic)) Consider the following results for two independent random samples taken from two populations. Sample 1 Sample 2 n 50 n2 35 1-1=13.6 X2= 11.1 a. What is the point estimate of the difference between the two population means? | b. Provide a 90% confidence interval for the difference between the two population means (to 2 decimals). c Provide a 95% confidence interval for the difference between the two population means to 2 decimals eBook Video...
2. (10p) Consider two independent random variables X and . The first has a unform pdf on (o.2) and the latter a Poisson pmf with mean 3. (1) Find the correlation E[XY] 2) Find the expectation E[e y']. 2. (10p) Consider two independent random variables X and . The first has a unform pdf on (o.2) and the latter a Poisson pmf with mean 3. (1) Find the correlation E[XY] 2) Find the expectation E[e y'].
A.) Let x be a random variable representing dividend yield of bank stocks. We may assume that x has a normal distribution with ? = 2.0%. A random sample of 10 bank stocks gave the following yields (in percents). 5.7 4.8 6.0 4.9 4.0 3.4 6.5 7.1 5.3 6.1 The sample mean is x = 5.38%. Suppose that for the entire stock market, the mean dividend yield is ? = 4.4%. Do these data indicate that the dividend yield of...
Complete the following four hypotheses, using α = 0.05 for each. The week 5 spreadsheet can be used in these analyses. 1. Mean sales per week exceed 42.5 per salesperson 2. Proportion receiving online training is less than 55% 3 Mean calls made among those with no training is at least 145 4. Mean time per call is 14.7 minutes Using the same data set from part A, perform the hypothesis test for each speculation in order to see if...
its separted into two pictures QUESTION 16 10 points The one-way ANOVA can be modeled as Use the following data to find the estimated treatment effect for "green". I green x-factor (o("green". "green". v-e(1.26, 1.274, 1.259, 1.743, 1.698, 1.6as) What is the value for t green? green", "biue", "blue*,"blue) O -0.221333 O 2.1514 O -0.4427 O 1.266 ¥ Question Completion Status: QUESTION 14 A simple linear regression model has a sample size of 15. What are the degrees of freedom...
CRBEMENo 6 (16 points) Answer the following questions about rolled steel W-beams (use the sable provided as necessary): Which one of the following characteristics makes a W-beam "optimal" (as i. assumed for this class)? a narrowest flange width largest section modulus lightest weight shallowest depth d. Ir the beam is bent about horizontal x-x avis and requires a minimum section modulus of 43.4 in', which of the following beams would make the "short list"? (For this question only, mark all...