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The manufacturer of a certain type of ATM machine reports that the mean ATM withdrawal is $60. The manager of a convenience store with an ATM machine thinks that mean withdrawal from his machine is less than this amount. He obtains a simple random sample of 35 withdrawals over the past year and finds the sample mean to be $ 54. Assume that the population standard deviation is $ 13.
a) What is the sampling distribution of the sample mean? __________________
b) State the hypotheses- H0 and H1.
c) Compute a test statistic. _________________
d) Determine the corresponding p-value. __________________
e) Make a decision using the p-value approach at the given α = 0.05.
f) Compute a cutoff value (or critical value) ______________
g) Make a decision using the Decision Rule approach at given α = 0.05.
Create a 95% confidence interval for mean cost of repairs. Interpret this interval.
Number of miles flown in a One- year period by the sample of "frequent flyers" was recorded. Is this a grouped or an ungrouped frequency distribution?
Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major.
Find out the regression variable that correlates best. Among which regression variable, carbon dioxide or methane correlates best with the earth's surface temperature.
2 to every even-numbered card, with aces being 1s. Determine the frequencies of 0, 1, and 2. Use SPSS to get the value of test statistic and p-value.
Compare a tabular cum sum chart using standardized values h = 5 and k = 1/2. What is the information you learn.
Using Sally's estimate of demand that follows, how many T-shirts should she produce for the upcoming event?
First part of this theorem allows a problem solver to compute probabilities about sample means regardless of whether a population is normally distributed.
Compute the effect size with gender as the grouping variable and ADDSC as the dependent variable.
Data on distribution of cost for building effort, design work and testing effort.
Compute the mean number and median number of apples in a bag.
The explanatory variable which is a measure of neighborhood socio-economic status variable RFM. Response variable is percent (%) of bicycle riders that wears a helmet.
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