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In a hypothesis test with hypotheses H0:μ=24 and H1:μ≠24 , a random sample of 33 elements selected from the population produced a mean of 26.1. Assume that σ=4.7, and that the test is to be made at the 10% significance level.
What are the critical values of z?
What is the value of the test statistic, z, rounded to three decimal places?
What is the p-value for this hypothesis test, rounded to four decimal places?
Test the given hypotheses:- there is no effect due to interaction;- there is no effect due to temperature; and- there is no effect due to school. Include the ANOVA summary table.
What would the control limits be for a type I error rate of 0.05? What factors would influence your selection of the type I error rate?
Which are the three equivalent scores that are represented by - 2Z in Figs 8.4a, b, and c?
The first three digits of a university telphone exchange are 452. if all the sequences of the remaining four digits are equally likely, what is the probability that a randomly selected universtiy phone number contains seven distinct digits?
Assume the underlying distribution of days since the last offense is normal for each state. Find a 99% confidence interval for the true mean number of days since the last offense for repeat offenders in each state.
billys bank is the only bank in a small town in arkansas. on a typical friday an average of 10 customers per hour
1. Define organizational communication 2. What interesting about the subject of organizational communication
A) What is the chance you will be profitable given you are downsized? B) What is the probability you are downsized or you are profitable?
Which is a possible value for the correlation of X and Y in the a) -0.75 b) 0 c) +1 d) +0.98
In exercises let X and Y be independent random variables. Let Z = Y - X. Let A = [|Y - X| = 1]. Find (i) P[A|X = 1], (ii) FZIX(0|1), (iii)fzlx(0|1), (iv)
Test the null hypothesis that there was no change in NEAT versus the two-sided alternative. Summarize the results of the test and give your conclusion.
Explain why it may be preferable to conduct a randomized experiment rather than an observational study to determine the relationship between two variables.
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