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Question: (Please show your work by making a table for d and d-square)
A motivational program was designed to increase the number of hours each student who took it studied per week. Eight randomly selected students were involved in the program. The table below shows the number of hours each student studied per week before the taking motivational program and after taking the program.
Before program: 8 12 10 12 5 10 10 12
After program: 12 11 14 15 8 15 9 6
At the 10% level of significance, can it be concluded the motivational program increased the average number of hours students studied per week?
Write down the null and alternate hypotheses. Formulate and test the appropriate hypotheses. Use the critical value approach.
Assume that the population of paired differences has a normal distribution.
Show the sampling distribution of p if a random sample of 150 insured individuals is used to estimate the proportion having received at least one ticket.
Test of product quality using human inspectors can lead to serious inspection error problems. To evaluate the performance of inspectors in a new company, a quality manager had a sample of 12 novice inspectors evaluate 200 finished products.
a survey is planned to determine the mean annual family medical expenses of employees of a large company. the
What was the success probability of each O-ring?
you have just been hired by an auto manufacturer. management wants to know if cars are younger today versus 1995.
a. Find the probability distribution of d1 and display it in a table. b. What is the expected value of d1? c. What is the value of the standard deviation of d1?
Should the hypothesis be accepted or rejected at the 5% level of significance that the production of acceptable items is independent of the hour of the morning in which they are produced?
Description of the study including the purpose and importance of the research question being asked. What is your null hypothesis? What is your research or alternative hypothesis? Your introduction should include at least two resources. These resou..
the life span of an electronic component that costs 100 is exponentially distributed with a mean on 10 years. the
A coin was flipped twenty times and landed heads fifteen times. Based upon this information, answer the following the question:
Employees of a local university have been classified according to gender and job type. The following table provides data about the employees.
What is statistical power? How does a researcher decide whether to use a one-tailed or two-tailed test? What are the advantages and disadvantages of using a two-tailed test?
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