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Find the estimated standard error for the sample mean for each of the following samples. (Use one decimal place)
n=4 with SS = 48_______
n=6 with SS= 270_________
n= 12 with SS= 132________
Why do t distributions tend to be flatter and more spread out than the normal distribution is? The (denominator) (numerator) (product) I chose product??___ of the t statistic contains the (sample standard deviation)(population mean)(population standard deviation)__i chose sample standard deviation________, which is _(different)(unknown)(the same)__I chose different ?________for different samples. The z score uses the _(population standard deviation)(population size)(sample standard deviation)_i chose population standard deviation?______________which is __(the same)(different)(unknown)_i chose same?______for different samples, Therefore, the t statistic has __(greater)(equal)(less)___less?________variabilty.
use the distribution tool to find the t values that form the boundaries of the critical region for a two-tailed test with o= .05 for each of the following sample sizes. use three decimal places.t distributiondegrees of freedom= 21
n=6t= ±
n=12t=±
n=24t=±
At the .05 significance level, is the number of units produced on the afternoon shift larger?
Using the data file below, construct a histogram and a frequency polygon. Describe the shape of this distribution.
annual maximum wind speed gusts have been modeled as both a type i gumbel and type ii largest extreme value. if the
What does this data tell us by itself before we do anything with it such as doing hypothesis testing or comparing it to other data? How can this be used by the M&M company?
Obtain b0 and b1 of the regression equation defined as y ^ = b0 + b1X and the coefficient of determination (r2) from the Excel regression output. Draw the fitted regression line on the scatter diagram.
Correlation of partial scores from one administration of one test - construct a frequency distribution table
Of 970 subjects, 20 answered yes and 950 answered no. find p^, the proportion of the sample who were victims. Find the standard error of this estimate.
a survey asked business travelers if they worked harder on a business trip. fifty percent of the respondents were
Federal administration stated that unemployment level in US is 8.6% (population proportion = 0.086). A hypothesis test is to be performed to decide whether unemployment level in NY State differs from national level.
How would you respond if someone told you that the correlation between education level and salary was 1.27?
The records of a casualty insurance company show that, in the past, its clients have had a mean of 1.8 auto accidents per day with a variance of 0.0016.
a population has a standard deviation of o 24.a. on average how much difference should exist between the population
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