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Statistics professor Dr. Stat claimed his pulse rate at the peak of an exercise program was lower than the mean pulse rate of statistics students. Dr. Stat's pulse rate was measured to be 60.0 bpm. His 20 students had a mean pulse rate of 74.4 bpm with a standard deviation of 10.0 bpm. What critical value you should use to test Dr. Stat's claim that statistics students have a mean pulse rate greater than 60.0 bpm at a 0.01 significance level?
At the 0.05 level of significance, is there an evidence of a different in the mean summated ratings between the two brands?
an automobile manufacturer is concerned about a fault in the braking mechanism of a particular model. the fault can on
consider the following. give your answers correct to two decimal places.a find the standard score z such that the area
the proportion of customer who rated service as either good or excellent was .65 p.65 you would like to know if
How was your stay? A hotel has 30 floors with 40 rooms per floor. The rooms on one side of the hotel face the water, while rooms on the other side face a golf.
Find the sample size needed if the margin of error of the confidence interval is to be no more than 0.02
Suppose a multiple regression model is given by y= -2.04x1 + 7.79x2 + 30.76. What would an interpretation of the coefficient of x1 ?be?
1 personal best finishing times for a particular race in high school track meets are normally distributed with mean
Calculate the expected revenue from a first-price auction as a function of the reserve price.
Indicate whether the sample should be called a self-selected sample or a convenience sample.- A magazine contains a survey about sexual behavior.
Suppose that one fisher from each park is chosen at random. What is the probability that the fisher chosen from Clearwater had a license and the fisher chosen from Mountain View did not have a license?
In a survey to estimate average household monthly medical expenses, 500 households were selected at random from a population of 5000 households. Of the selected households, 336 had children in the household and 164 had no children.
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