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People who wrote about a time when their lives were unfair were more frustrated (M = 2.45, SD = 1.21) than were people who wrote about a time when they were bored (M = 1.94, SD = 1.11), t(103) = 2.25, p= .03. 1. Bold descriptive statistics and underline or highlight inferential statistics. 2. List test statistic _______, p value _____ _____ 3. What decision should the author make about the null hypothesis (i.e., retain or reject)? 4. What are two possible interpretations?
AU Cellular believes their sales are more consistent than their rival Softbank Cellular. Below is the number lost calls a day over the last seven days. Do you agree with AU? Use the .01 significance level.
The mean is 15.8 tons. the sample standard deviation is 5.0 tons. what is the 95 percent interval for the population mean?
Mean cost of the table in a region is $10 with a standard deviation of $2. Compute the standard deviation of the sampling distribution of sample size 36.
How would the result that you reported in part (c) change if only 25% of the respondents said that they did not currently play a musical instrument?
Imagine that the equation for predicting y from x is y = 1.12 - .47x.- How would you use this equation to predict a particular individual's score?
Instead of developing the customer's needs as a part of the sales presentation, he goes directly to the close.
suppose that gmat scores are normally distributed with a mean of 530 and a standard deviation of 100. a school only
a distribution with m35 and a standard deviation 8 is being standardized so that the new mean and standard deviation
Odometers measure automobile mileage. How close to the truth is the number that is registered?- State the null hypothesis, choose an alternative hypothesis, perform a t test, and write a conclusion.
Assuming that serum cholesterol levels for women ages to are normally distributed, find a confidence interval for the mean serum cholesterol level of all women in this age group. Then complete the table below.
in a survey of 606 males ages 18-64 397 say they have gone to the dentist in the past year. construct 90 and 95
A farm brings 15 tons of watermelon to market. Find a 90% confidence interval for the population mean cash value of this crop. What is the margin of error?
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