Lab on Inference for the population mean
... 3.3) The teacher collects a simple random sample of 25 older students, gives them the test and calculates the sample mean of the scores which happens to be 125.8. You want to make your decision using =0.05 Calculate the test statistic ________________ Calculate the p-value ______________________ ...
... 3.3) The teacher collects a simple random sample of 25 older students, gives them the test and calculates the sample mean of the scores which happens to be 125.8. You want to make your decision using =0.05 Calculate the test statistic ________________ Calculate the p-value ______________________ ...
12 - JustAnswer
... points) n1=60, s1=24 n2=120, s2=28 alpha= 0.05 Ans: Ho : σ1 2 = σ2 2 Ho : σ1 2 ≠ σ2 2 F statistic value = s22 / s12 = 282 / 242 = 1.3611 F (0.05, 119, 59) = this figure is not available in any standard Ftable so I am taking the value of F(0.05,120,60) = 1.47. So, our critical region is above 1.47. T ...
... points) n1=60, s1=24 n2=120, s2=28 alpha= 0.05 Ans: Ho : σ1 2 = σ2 2 Ho : σ1 2 ≠ σ2 2 F statistic value = s22 / s12 = 282 / 242 = 1.3611 F (0.05, 119, 59) = this figure is not available in any standard Ftable so I am taking the value of F(0.05,120,60) = 1.47. So, our critical region is above 1.47. T ...
QMTH 206 Quiz # 2
... 1. Daily sales of a small clothing store are known to follow a normal distribution N( μ, σ ) with a mean = μ and a standard deviation = σ. Assume that σ is known to have a value of $700. A sample of sales (in dollars only) is taken for 5 days and the sample mean is computed to be $4500. a. What is t ...
... 1. Daily sales of a small clothing store are known to follow a normal distribution N( μ, σ ) with a mean = μ and a standard deviation = σ. Assume that σ is known to have a value of $700. A sample of sales (in dollars only) is taken for 5 days and the sample mean is computed to be $4500. a. What is t ...
Statistics 50 Exam 1 Formulas
... Central Limit Theorem for Sums: The population of sample sums for sums of n sample values taken from a population with mean and standard deviation is approximately normally distributed for large n, has mean n, and standard deviation n . Central Limit Theorem for Proportions: The population of ...
... Central Limit Theorem for Sums: The population of sample sums for sums of n sample values taken from a population with mean and standard deviation is approximately normally distributed for large n, has mean n, and standard deviation n . Central Limit Theorem for Proportions: The population of ...
Lecture note
... who prefer our company’s brand to within .03 with 95% confidence. 1.96 p̂(1 p̂) – Find the sample size. n – Solution ...
... who prefer our company’s brand to within .03 with 95% confidence. 1.96 p̂(1 p̂) – Find the sample size. n – Solution ...
HW #5: Due Wednesday June 13
... one mean, the difference between 2 means, one proportion, and the difference between 2 proportions. In this section, we will concentrate on the important relationship between hypothesis testing and confidence interval. Confidence Intervals and Two-sided Alternatives When testing one population mean ...
... one mean, the difference between 2 means, one proportion, and the difference between 2 proportions. In this section, we will concentrate on the important relationship between hypothesis testing and confidence interval. Confidence Intervals and Two-sided Alternatives When testing one population mean ...
Review for TEST I - Florida International University
... are released into each room, and after 1 hour the numbers of dead insects are counted." There are 120 dead insects in the room sprayed with A and 90 in the room sprayed with B. Do the data provide enough evidence to indicate that spray A is more effective than spray B? Use α = .05. 3. To compare two ...
... are released into each room, and after 1 hour the numbers of dead insects are counted." There are 120 dead insects in the room sprayed with A and 90 in the room sprayed with B. Do the data provide enough evidence to indicate that spray A is more effective than spray B? Use α = .05. 3. To compare two ...
