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A random sample of 86 eighth grade? students' scores on a national mathematics assessment test has a mean score of 292. This test result prompts a state school administrator to declare that the mean score for the? state's eighth graders on this exam is more than 285.
Assume that the population standard deviation is 37.
At alpha=0.09, is there enough evidence to support the? administrator's claim? Complete parts? (a) through? (e).
?(a) Write the claim mathematically and identify Null and alt hypothesis.
(b) Calculate the standardized test statistic. (round to two decimal places as needed.
(c) What is the P value? (round to three decimal places if needed
(d) What is the outcome? conclusion?
Given that X‾ = 78, σ2 = 25, n = 10, and α = .05, test H0:µ > 80, assuming observations are randomly sampled from a normal distribution. Also, draw the standard normal distribution indicating where Z and the critical value are located.
Does the test show enough evidence to reject the findings of Robert Half International - Conduct a hypothesis test using this tool.
the standard normal table shows an area value of 0.8 for a z-score of 0.84. what percentage of the observations of a
Discuss the relevance of the commands unlist and unclass.- Using the Orange dataset that monitors tree growth versus age for five orange trees, represent the dataset using the command xyplot.
Treating low bone density (4.2) Fractures of the spine are common and serious among women with advanced osteoporosis (low mineral density in the bones).
question 1 a company sells packets of biscuits that they claim on average contains at least 20 g biscuits in each
1 a top nhl hockey player scores on 93 of his shots in a shooting competition. what is the probability that the player
Suppose you are a pollster and are planning to take a sample that is very small relative to the population. In terms of estimating a population mean.
Locate the data set "Bank.sav" and open it with SPSS. Follow the steps in section 10.15 Learning Activity as written. Answer all of the questions in the activity based on your observations of the SPSS output. Type your answers into a Word docum..
To test whether animal subjects consume the same amounts of sweet-tasting solutions, a researcher has 10 subjects consume one of three sweet-tasting solutions.
What are the initial center line and control limits for a chart of the daily proportion of mishandled baggage reports?
a researcher has developed a new drug designed to reduce blood pressure. in an experiment 21 subjects were assigned
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