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A. Perform hypothesis testing with for each of the four hypothesis statements: alpha = 0.05
1. Mean sales per week exceed 42.5 per salesperson:
2. Proportion receiving online training is less than 55%: To find p-hat, the sample proportion, you need to count how many of online, then divide it by the total.
3. Mean calls made among those with no training is at least 145:
4. Mean time per call is 14.7 minutes: This is a two-tailed test here, you need to split the in half for each side of the curve.
Sample Calls mean = 158.44, sample standard deviation = 19.28, n= 100
Sample Time mean = 15.23, sample standard deviation = 2.61, n = 100
in sludge county a sample of 50 randomly selected citizens were tested for pinworm. of these 10 tested positive 20. the
Vincent Chiarella was employed as a printer in a financial printing firm that handled the printing for takeover bids. Although the firm names were left out of the financial materials and inserted at the last moment, Mr. Chiarella was able to deduc..
What is the cutoff for high leverage in this scenario? Using the rule-of-thumb for leverages presented in class, state whether this point has high leverage?
And then to find the best line, this is where predicted Y and residual that is unaccounted for is used? Are coefficients the key to finding what regression?
Working at Company X is very stressful for any human being. Medecines Sans Frontires stepped in to see if there is any possible violations of human rights at the notorious Company X.
Calculate the MSE for db(x) as a function of the choice b. Find the value of b (depending on n) that minimizes the MSE.
Random samples of 25 observations were selected from each of 3 populations. For these data, SSTR= 120 and SSE = 216.
You are dealt one card from a 52- card deck. Then the card is replaced in the deck, the deck is shuffled, and you draw again. Find the probability of getting a picture card the first time ad a spade the second time.
1. Break the function down by answering the following: a. How many terms are in the equation? b. Give the coefficients and the constants (label them).
a survey reported that 70 of those responding to a national survey of college freshmen were interested in taking summer
With reference to Exercise 25, use the large-sample confidence-interval formula of Exercise 19 to construct a 98% confidence interval for the standard deviation of the time it takes a mechanic to perform the given task.
Using a probability of error, test the hypothesis that the market shares are equal versus the hypothesis that they are not equal (market 2 - market 1).
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