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. Assume that the data has a normal distribution and the number
. Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. Alpha = 0.09 for a right-tailed test. (… read more
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For John 1. A handler loads one item every 30 minutes, so
For John 1. A handler loads one item every 30 minutes, so 80 items are completed in her first week of work. Her manager checks her work by randomly selecting a day of the week, then reviewing all the … read more
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1. The American Auto Association reports the mean price per
1. The American Auto Association reports the mean price per gallon of regular gasoline is $3.10 with a population standard deviation of $0.20. Assume a random sample of 16 gasoline stations is selecte… read more
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1. Assume that the data has a normal distribution and the number
1. Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. = 0.05 for a left-tailed test. -1.96 ±… read more
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Make sure for each problem that you use the appropriate formulas
Make sure for each problem that you use the appropriate formulas for each part of each problem, draw a normal or skewed curve with the correct shaded region when doing hypothesis testing questions, an… read more
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1. The test grades for twelve students in a certain statistics
1. The test grades for twelve students in a certain statistics class are: 87, 60, 72, 98, 99, 59, 67, 94, 92, 89, 93, 100 a] The mode is______ because ________________________________________________ … read more
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For the following statement, write the null hypothesis and
For the following statement, write the null hypothesis and the alternative hypothesis. Also label which one is the claim. An employment agency claims that the mean starting salary for actuary assistan… read more
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1)The average life of light bulbs produced by SABA Electric
1)The average life of light bulbs produced by SABA Electric Co. is believed to be normally distributed with the mean service life of 950 hours and a standard deviation of 100 hours. A random sample of… read more
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1. The advertising department at Coupons Inc. claims that 90%
1. The advertising department at Coupons Inc. claims that 90% of women who shop online use coupons. Smart Source :) magazine surveyed 1000 women across the country. 87% of the women claim to use onlin… read more
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Suppose a study reports that the average price for a gallon
Suppose a study reports that the average price for a gallon of self-serve regular unleaded gasoline is $3.16. You believe that the figure is higher in your area of the country. You decide to test this… read more
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Suppose a study reports that the average price for a gallon
Suppose a study reports that the average price for a gallon of self-serve regular unleaded gasoline is $3.16. You believe that the figure is higher in your area of the country. You decide to test this… read more
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NEED SOME HELP to this questions need in about 1 hours
Hi I need some answers to this questions? need in about 4 hours thanks! 1. (TCO 8) For the following statement, write the null hypothesis and the alternative hypothesis. Then, label the one that is th… read more
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With numbers included 1. Some college graduates employed
With numbers included: 1. Some college graduates employed full-time work more than 40 hours per week, and some work fewer than 40 hours per week. We suspect that the mean number of hours worked per we… read more
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1. Some college graduates employed full-time work more than
1. Some college graduates employed full-time work more than hours per week, and some work fewer than hours per week. We suspect that the mean number of hours worked per week by college graduates, , is… read more
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An automotive expert claims that the large number of self-serve
An automotive expert claims that the large number of self-serve gasoline stations has resulted in poor automobile maintenance, and that the average tire pressure is more than 4 pounds per square inch … read more
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The contingency table below shows the results of a random sample
The contingency table below shows the results of a random sample of 200 state politicians that was conducted to see whether their opinions on a bill were related to their party affiliation. Use a 5% l… read more
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3. A random sample of 41 observations was selected from a normally
3. A random sample of 41 observations was selected from a normally distributed population. The sample mean was = 46, and the sample variance was s2 = 68.0. Does the sample show sufficient reason to co… read more
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A NAPA Auto Parts supplier wants information about how long
A NAPA Auto Parts supplier wants information about how long car owners plan to keep their cars. A random sample of 41 car owners results in a mean of 7 years. Assume a population a standard deviation … read more
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