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Question: Raising pay. Suppose that the teachers in the previous exercise each receive a 5% raise. The amount of the raise will vary from $1500 to $3000, depending on present salary. Will a 5% across-the-board raise increase the spread of the distribution as measured by the distance between the quartiles? Do you think it will increase the standard deviation? Explain your reasoning.
question a researcher in the west coast of the u.s. wants to estimate the amount of a newly discovered antibody in
In a standard normal dist. what is the prob. of getting a value less than 1.63? How about between 1.13 and 1.86? How about greater than .58?
Construct a boxplot for the husbands' heights.- Use the range to approximate the standard deviation for these heights.
Mike hears the weather forecast, and there ia a 50 percents chance of rain.Find the probability that he will have to work overtime given taht it rains.
Discuss a hospitals total maintenance costs, and use regression analysis to estimate the fixed cost element of maintenance and the variable cost associated with the number of patient-days.
Test the hypotheses that the average household income in the township is greater than $100,000. Hint: Start by stating the null and alternative hypotheses.
what is the importance of a 5 significance level? why would you choose 5 as opposed to 10 or 1? what effect does the
We toss an unfair coin 100 times in a row. We play according to following rules: If tail: +$1 If head: -$1.45 P(head=0.4) Estimate chances to earn at least $3 at the end of this experiment.
A lot consisting of 100 fuses is inspected by the following procedure: 5 fuses are selected randomly, and if all 5 "blow" at the specified amperage, the lot is accepted. Suppose that the lot contains 10 defective fuses. Find the probabily of accep..
Correlation between the two variables - Evaluate the value of the correlation coefficient.
Can the company claim that they are faster than the average utility?
In its test, the agency found the mean change in pulse rate was + 5.7 beats per minute, with a standard deviation of 1.6. Using the 0.01 level of significance, examine whether the billboard stimulus could meet the agency's criterion for effectiven..
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