The event A shows the sum of faces when tossing a coin two times, then the probability that the sum of faces is prime is

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Question 6
The event A shows the sum of faces when tossing a coin two times, then the probability
that the sum of faces is prime is
14/36
O 13/36
18/36
O 15/36
Question 7
Seventy five percent of students at a collage with a large student population of Size 100
use the social media site Instagram.
Five students are randomly selected
two of these three students use Insta
Transcribed Image Text:Question 6 The event A shows the sum of faces when tossing a coin two times, then the probability that the sum of faces is prime is 14/36 O 13/36 18/36 O 15/36 Question 7 Seventy five percent of students at a collage with a large student population of Size 100 use the social media site Instagram. Five students are randomly selected two of these three students use Insta
Question 11
A research analyst disputes a trade group's prediction that back-to-school spending will verige
$600 per family this year. She believes that average back-to-school spending will difter from this
amount. She decides to conduct a test on the basis of a random sample of 25 households with
school-age children. She calculates the sample mean as $620. She also believes that back-fo-
school spending is normally distributed with a population standard deviation of $6. She wonts to
conduct the test at the 5% significance level.
a. Specify the competing hypotheses in order to test the research analyst's claim.
b. Calculate the value of the test statistic.
d. At this significance level, does average back-to-school spending differ from $6007
A
- IE三 項 xxEE
Paragiaph
A
BI
T. 12pt
Transcribed Image Text:Question 11 A research analyst disputes a trade group's prediction that back-to-school spending will verige $600 per family this year. She believes that average back-to-school spending will difter from this amount. She decides to conduct a test on the basis of a random sample of 25 households with school-age children. She calculates the sample mean as $620. She also believes that back-fo- school spending is normally distributed with a population standard deviation of $6. She wonts to conduct the test at the 5% significance level. a. Specify the competing hypotheses in order to test the research analyst's claim. b. Calculate the value of the test statistic. d. At this significance level, does average back-to-school spending differ from $6007 A - IE三 項 xxEE Paragiaph A BI T. 12pt
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