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Students in an introductory statistics class were asked to report the age of their mothers when they were born. Summary statistics include
Sample size: 36 students Sample mean: 29.643 years
Sample standard deviation: 4.564 years
State the appropriate null and alternative hypotheses in symbols.
Calculate the test statistic.
Determine (as accurately as possible) the p-value of the test.
State your test decision at the .05 significance level.
Find the area between z = -0.65 and z = 0.37, find the area to the right of z = 2.35
How do we decide if the homogeneity of variance assumption is significantly violated?
Find the standard deviation and variance from the (population) data below. Describe your results.
in a trial of 180 patients who received 10-mg doses of a drug daily 27 reported headache as a side effect. use this
Exploitron, Inc. conducts a random survey of 700 of their workers and finds that the average employee earns $31,782 per year, with a standard deviation of $622. The Census reports that the average American worker makes $30,059. The CEO of Exploitron ..
These data represent the number of students attending a high school. Draw a line graph for the data.
Mr.Smith works on a temporary basis. The mean length of each job he gets is three months. If the amount of time he spends between jobs is exponentially distributed with distributed with mean 2, then at what rate does Mr. Smith get new job?
question 1current weekly demand forecast for an item follows a normal distribution with a mean of 100 units with a
Estimating a linear regression equation to predict the future values of the dependent variable Y.
Based on this information, what is the probability that a customer will spend more than 9 minutes in the record store?
What is the probability of flipping a coin 6 times and getting 4 or more heads?
the following sample was obtained from a population with unknown parameters.scores 612034.a. compute the sample mean
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