Answered: 2. The heights of a random sample of 50… | bartleby

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section: Chapter Questions

Problem 22SGR

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Note: pls do it type-written thank you

Instruction: Answer the following question, show your solution
and once you get the final answer, interpret it.
dents in a certain
dormitory
of $8.00
for
ad, Will a Stame
a 90%
week on
Denature
do
nor
mately
TISITINIRA
2. The heights of a random sample of 50 college students
showed a mean of 174.5 centimeters and a standard deviation
of 6.9 centimeters. Construct a 98% confidence interval for
the mean height of all college students.
CUTTITUCITE-
ch

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Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 65 weekly reports showed a sample mean of 19.5 customer contacts per week. The sample stand deviation was 5.2. Provide 90% and 95% confidence intervals for the population mean number of weekly customer contacts for the sales personnel. 90% confidence interval, to 2 decimals: 95% confidence interval, to 2 decimals:
Sam is the manager of a used clothing store. He wants to estimate the average amount a customer spends per visit. A random sample of 70 customers’ receipts gave a mean of = $7.10 with a standard deviation s = $2.30. Find a 99% confidence interval for the average amount spent by all customers. Interpret your findings.
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psda q2
Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 55 weekly reports showed a sample mean of 18.5 customer contacts per week. The sample standard deviation was 5.2. Provide 90% and 95% confidence intervals for the population mean number of weekly customer contacts for the sales personnel. 90% Confidence interval, to 2 decimals: 95% Confidence interval, to 2 decimals:
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see attached
ision Making home > 5.2: Hypothesis test for a population mean ypothesis test for a population mean. ote: 1295 Jump to level 1 A pipes manufacturer makes pipes with a length that is supposed to be 11 inches. A quality control technician sampled 40 pipes and found that the sample mean length was 11.06 inches and the sample standard deviation was 0.27 inches. The technician claims that the mean pipe length is not 11 inches. What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex: 20 Does sufficient evidence exist at the a = 0.05 significance level to support the technician's claim? Select Check t Next MESA 81101 2 hp 3
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