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I don't know how to find the 80th percentile. I'm confused
I'm confused on how to find the 80th percentile and one of my math promblems … read more
GLENN GILONGOS
GLENN GILONGOS
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The population mean annual salary for environmental
The population mean annual salary for environmental compliance specialists is about ​$63,000. 63,000. A random sample of 34 34 specialists is drawn from this population. What is the probability that t… read more
Ryan
Ryan
Bachelor's Degree
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again, i need some help with this statistics homework
Hello again, i need some help with this statistics homework once more. I have 13 questions, and for questions 11 and 12 I have a screenshot of the problem but i am not sure how i would be able to send… read more
Ryan
Ryan
Bachelor's Degree
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In a survey of women ages 20-29, the mean height was 66.6"
In a survey of women ages 20-29, the mean height was 66.6" with a standard deviation of 2.73 inches. (a). What is the height that represents the 98th percentile and (b) what heights represent the firs… read more
Chirag
Chirag
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Measures of dispersion A. provide information that allow comparisons
Measures of dispersion A. provide information that allow comparisons between the spreads of two or more distributions. B. cannot be calculated for grouped data. C. convey information on how the data i… read more
Math-John
Math-John
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Thanks in adnvance and i will amke sure you get tipped well.
Thanks in adnvance and i will amke sure you get tipped well. thank you a survey was conducted to measure the height of men. in survey respondents were grouped by age. in the 20-29 age group, the heigh… read more
Ryan
Ryan
Bachelor's Degree
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find the area of the shaded region. the graph depicts the standard
find the area of the shaded region. the graph depicts the standard normal distribution with mean 0 and standard deviation 1, z=.35. what is the area of the shaded region? assume the random varibale x … read more
Chirag
Chirag
Master's Degree
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8. The life span of a battery is normally distributed, with
8. The life span of a battery is normally distributed, with a mean of 2300 hours and a standard deviation of 50 hours. What percent of batteries have a life span that is more than 2365 hours? What per… read more
Ryan
Ryan
Bachelor's Degree
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A survey was conducted to measure the height of men. In the
A survey was conducted to measure the height of men. In the survey, respondents were grouped by age. IN THE 20-29 age group, the heights were normally distributed, with a mean of 69.1 inches and a sta… read more
Stevewh
Stevewh
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a survey was conducted to measure the height of men. in the
a survey was conducted to measure the height of men. in the survey, respondents were grouped by age. In the 20-29 age group, the heights were normally distributed, with a mean of 68.2 inches and a sta… read more
Stevewh
Stevewh
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Bachelor's Degree
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In a survey of women in a certain country (ages 20-29), the
In a survey of women in a certain country (ages 20-29), the mean height was 63.2 inches with a standard deviation of 2.81 inches. 1) what height represents 80th percentile? 2) what height represents t… read more
abozer
abozer
Bachelor's Degree
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a survey was conducted to measure the height of men. in the
a survey was conducted to measure the height of men. in the survey, respondents were grouped by age. In the 20-29 age group, the heights were normally distributed, with a mean of 69.1 inches and a sta… read more
abozer
abozer
Bachelor's Degree
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A set of 50 data values has a mean of 18 and a variance of
A set of 50 data values has a mean of 18 and a variance of 4. 1) Find the standard scor (z) for a data set=20 2) Find the probability of a data value <20. Im confused on this...one tutor said that … read more
Ryan
Ryan
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Heights of men aged 25to 34 have a standard deviation of 2.9.
Heights of men aged 25to 34 have a standard deviation of 2.9. Use a 0.05 significance level to test the claim that the heights of women aged 25 to 34 have a different standard deviation. The heights (… read more
Chirag
Chirag
Master's Degree
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Hi, Please any help will be appreciated. Use the normal
Hi, Please any help will be appreciated. Use the normal distribution od SAT critical reading scores for which the mean is 508 and the standard deviation is 120. Assume the variable x is normally distr… read more
Stevewh
Stevewh
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Bachelor's Degree
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12. Find the Range and Standard Deviation 98 92 95 87 96 90 65 92 95 93 98 94 1
12. Find the Range and Standard Deviation: 98 92 95 87 96 90 65 92 95 93 98 94 16. Find the Range and Standard Deviation: 5.60 5.63 5.58 5.56 5.66 5.58 5.57 5.59 5.67 5.61 5.84 5.73 5.53 5.58 5.52 5.6… read more
Elizabeth
Elizabeth
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Using STATDISK. Finding Standard Normal Distribution. Assume
Using STATDISK. Finding Standard Normal Distribution. Assume that the reading on the thhermometers is normally distributed with a mean of 0ºC and a standard deviation of 1.00ºC. A thermemeter is rando… read more
Greg
Greg
Master's Degree
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1.a vending machine dispenses coffee into a twenty ounce cup.
1.a vending machine dispenses coffee into a twenty ounce cup. The amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.06 ounce. You can allow the cup to over… read more
Stevewh
Stevewh
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