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The MBA department is concerned that dual degree students may be receiving lower grades than the regular MBA students. Two independent random samples have been selected 350 observations from population 1 (dual degree students) and 310 from population 2 (MBA students). The sample means obtained are X1(bar)=84 and X2(bar)=87. It is known from previous studies that the population variances are 4.6 and 5.0 respectively. Using a level of significance of .05, is there evidence that the dual degree students are receiving lower grades? Fully explain your answer.
Create the table for frequency distribution that has 16 class intervals of width 1 inch. Utilize 61.5 inches as lower limit of first interval and 62.5 as upper limit.
The cost of using the equipment is $250. The materials used in one shirt cost $10, and Gina can sell these for $15 each. How many shirts must Gina sell to break even?
The measure of forecast accuracy that is not influenced by the measurement scale of the time series data is:
According to an IRS study, it takes an average of 330 minutes for taxpayers to prepare, copy, and electronically file a 1040 tax form. A consumer watchdog agency selects a random sample of 40 taxpayers and finds the standard deviation of the time ..
The mean age of school bus drivers in Denver is claimed to be 56.9 years. A hypothesis test is performed at a level of significance of 0.05 with a P-value of 0.03. Choose the best interpretation of the hypothesis test.
Summarize in words each of the following findings: The Tukey test was significant at .01 for two groups (A and E).
A teacher gives a pre and post test to her students, she wants to know if there is a difference in the number of points students earned on their pretest and post test.
The proportion of adults in the sample, as her estimate of p, the proportion of adults in the pond population. Find using the normal approximation with the continuity correction.
Score for the states eith graders on the examination is more than 260. At alpha equals 0.04 is there enough evidence to support the clim?
A population consists of 15 items, 10 of which are acceptable. In a sample of 4 items, what is the probability that exactly 3 are acceptable? Assume the samples are drawn without replacement.
At the 5% level of significance, can we infer that branch A has a significantly higher proportion of satisfied customers than branch B?
A fair die is rolled nine times. What is the probability that an odd number (1,3 or 5) will occur less than 3 times?
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