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The following data give the speeds of 13 cars (in mph) measured by radar, traveling on I-84.
73 75 69 68 78 69 74
76 72 79 68 77 71
a) Find the values of the three quartiles and the interquartile range.
b) Calculate the (approximate) value of the 35th percentile (round to two decimal places).
c) Compute the percentile rank of 71 (round to two decimal places. Do not include the % symbol).
Note: Round to two decimal places. Do not include unit.
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Given the following data from two independent samples, conduct a one-tailed hypothesis test to determine if the first sample mean is larger than the second sample mean, given a 0.05 level of significance.
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The branch manager of a pet supply store wants to study characteristics of customers of his store. In particular, he decides to focus on two variables
1.at what age do babies learn to crawl? does it take longer to learn in the winter when babies are often bundled in
Determine how long until the population of your city doubles assuming a steady growth rate - Discuss factors that could possibly influence the growth rate of your city and state.
A study is conducted to investigate body mass index (BMI) in children living in urban neighborhoods. The following data are collected. 29 26 24 32 30 22 27 28 31. Compute the median.
a researcher obtains an f-ratio with df 2 36 from an independent-measures research study. what is the total number of
Calculate a 95% Confidence Interval for the following samples:=450, N=200, σ=100=105, N=50, σ=15= 19, N = 17, s = 5= 8, N = 40, s = 1.6= 8.35, N = 30, s = 1.59
The standard deviation of the population of adult female height scores is 3 inches. A random sample of 50 women yields a mean height of 64 inches. Calculate the standard error of the mean.
The probability that the client will select alternative a is 0.1, with P(c) = 0.5 and P(c) = 0.4. Identify the discrete random variable in this situation and determine its expected value.
ComputerWare asked 500 of its iMac purchasers what computer they owned or had owned. There were 83 new computer owners, 60 who had owned a Windows-based computer, and 357 who had owned a Macintosh.
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