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Question 1: The Central Limit Theorem states that the sampling distribution of means is:
a) only available by inference
b) only available when sample sizes are less than 10
c) only available when the very high and very low means have been eliminated
d) approximately normal in shape
Question 2: The z test may be used to determine
a) if the sample is representative of a known population
b) if a sample contains bias
c) the exact amount of sampling error contained in the parameter mean
d) the amount of sampling error contained in the population's standard deviation
The null hypothesis is to be tested at the 10% level of significance. The critical value from the table is:
They were planted in four different locations, so we will consider the field as a second factor because different soil and moisture types can also have an effect on yield. The interaction plot below was obtained.
At the .01 significance level, is there a difference in the use of the four entrances?
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.
Develop a linear regression equation for the given data and forecast how much money Robert will win if he spends $30.
Find out the upper and lower bounds on average life expectancy of the Canadian women such that at least 90% of all population is included.
Give all steps of a test of the hypothesis that the corresponding population proportions are equal.
Compute mean, standard deviation, coefficient of variation and 5 key percentiles for these data.
If the sample consists of n = 15 individuals, then compute df value for the t statistic?
Suppose it costs $25 per student for the administrators to provide the course materials.
each person received was determined by randomization. For each person who was sent one of the surveys, the researcher recorded whether or not a completed survey was returned.
Either summarize your design or give an appropriate layout with table.
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