Which of these correctly describes the shape of the
distribution of water bills?
Residents in...
Mathematics, 14.01.2021 09:30, brydenskl814
Which of these correctly describes the shape of the
distribution of water bills?
Residents in a city are charged for water usage every
three months. The water bill is computed from a
common fee, along with the amount of water the
customers use. The last water bills for 40
neighborhood residents are displayed in the histogram
below.
SESE
O uniform
O skewed left
O skewed right
O roughly symmetric
Neighborhood Monthly Water Bill
15
Frequency
Soad vit
Answers: 1
Mathematics, 21.06.2019 15:40, tylorroundy
Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population, find the population standard deviation, o.79828588912497
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Mathematics, 21.06.2019 20:00, janeriaw188
Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line
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Mathematics, 22.06.2019 00:00, bri9263
(20 points) a bank has been receiving complaints from real estate agents that their customers have been waiting too long for mortgage confirmations. the bank prides itself on its mortgage application process and decides to investigate the claims. the bank manager takes a random sample of 20 customers whose mortgage applications have been processed in the last 6 months and finds the following wait times (in days): 5, 7, 22, 4, 12, 9, 9, 14, 3, 6, 5, 15, 10, 17, 12, 10, 9, 4, 10, 13 assume that the random variable x measures the number of days a customer waits for mortgage processing at this bank, and assume that x is normally distributed. 2a. find the sample mean of this data (x ě…). 2b. find the sample variance of x. find the variance of x ě…. for (c), (d), and (e), use the appropriate t-distribution 2c. find the 90% confidence interval for the population mean (îľ). 2d. test the hypothesis that îľ is equal to 7 at the 95% confidence level. (should you do a one-tailed or two-tailed test here? ) 2e. what is the approximate p-value of this hypothesis?
Answers: 2
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