A software company is interested in improving customer satisfaction rate from the 65% currently claimed. The company sponsored a survey of 248 customers and found that 170 customers were satisfied. What is the test statistic z?

Q: The test statistic is enter your response here.

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Q: Find the Zc value for a 92% confident interval when the sample sizes 27

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Q: Claim: Fewer than 93 ​% of adults have a cell phone. In a reputable poll of 1162   ​adults, 85 ​%…

A: Given information- Population proportion, p = 0.93 Sample size, n = 1162 Sample proportion is- We…

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Q: What is an “average” z-score? Explain your answer?

A: A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of…

Q: Most adults would erase all of their personal information online if they could. A software firm…

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Q: new soft drink is being market tested. A sample of 356 individuals participated in the taste test…

A: Formula : Test statistic :

Q: During the 2010 MLB seasons, the home team won 1,269 games and the away team won 1,371 games. What…

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Q: The percentile 87 (Pg7) such that Pg7=78, means that: Select one: a. 13% of values are greater than…

A: A discrete variable is a variable whose value can be obtained by counting. A discrete variable is a…

Q: You are asked to design a study to investigate the effectiveness of the Atkins diet (IV = diet, DV =…

A: Independent t test:Independent t test determines whether there is significant difference between the…

Q: A software company is interested in improving customer satisfaction rate from the 65% currently…

A: Given,population proportion(P)=0.65sample size(n)=207no.of customers who were satisfied(x)=145

Q: With a percentile of 68 on a test of ambience given to mindanao resorts, bung gumni resorts score of…

A: Given, With a percentile of 68 on a test of ambience given to Mindanao resorts, bung gummi resorts…

Q: A software company is interested in improving customer satisfaction rate from the 80% currently…

A: The Null and Alternative Hypotheses is given by: H0: p0=0.80 H1: p0≠ 0.80 The sample proportion is…

Q: Suppose that 5000 students who have taken the SAT exam once are randomly assigned to either take an…

A: From the provided information,

Q: ​Claim: Fewer than 95​% of adults have a cell phone. In a reputable poll of 1073 ​adults, 90​%…

A: Formula for Test statistic  Test statistic ( z ) z = ( p^ - p ) / ( √( p * ( 1 - p) / n) )

Q: A research study examined the effects of a new drug versus an old drug on hypertension. There were…

A: The objective of this question is to determine if there is a significant difference in the…

Q: A software company is interested in improving customer satisfaction rate from the 61% currently…

A: It is given that x=176, n=267 and P=0.61.

Q: How do i find the test statistic and the p-value?

A: The sample sizes are 22 and 22.

Q: A software company is interested in improving customer satisfaction rate from the 61% currently…

A:

Q: A software company is interested in improving customer satisfaction rate from the 66% currently…

A: From the provided information, A software company is interested in improving customer satisfaction…

Q: 90th percentile = $39,300 For each of these percentiles, interpret the value of the percentile.…

A: It is given that 10th percentile = $025th percentile = $050th percentile = $1100075th percentile =…

Q: Most adults would erase all of their personal information online if they could. A software firm…

A:

Q: A software company is interested in improving customer satisfaction rate from the 50% currently…

A: The null and alternative hypothesis is defined as:

Q: A software company is interested in improving customer satisfaction rate from the 55% currently…

A: From the given information, The population proportion is, p=55%=0.55 The company sponsored a survey…

Q: A popular charity used 36% of its donations on expenses. An organizer for a rival charity wanted to…

A: Given data : 19 25 31 20 41 32 26 21 9 24

Q: The varaibility of a statistic is described by

A: The variability means the spread ness of the data set. The best measure of spread ness is standard…

Q: (b) What is the standard deviation of change in the control group? (Round your answer to three…

A: Given Information:   Exercise group Control group Mean change -0.37 -0.47 95% CI (-1.36,…

Q: A software company is interested in improving customer satisfaction rate from the 75% currently…

A: Hypotheses: The null and the alternative hypotheses are, H0:p=0.75H1:p>0.75

Q: hat is a percentile and how do we plot them on box and whisker plots?

A: Percentile is the value in statistics which divides the population in two groups. The certain…

Q: A software company is interested in improving customer satisfaction rate from the 62% currently…

A: Population proportion is 0.62 Sample proportion is 90/135 =0.6667

Q: Explain the Critical Z score.

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Q: A software company is interested in improving customer satisfaction rate from the 55% currently…

A:

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A: To find, Which of the four indicators would you use to reassure a patient that the positive result…

Q: A software company is interested in improving customer satisfaction rate from the 61% currently…

A: Sample size n =196 Favorable cases x =126 Sample proportion p^=x/n  =126/196 =0.6429

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A: From the given information GRE practice test scores were compared before and after 40 students had…

Q: A national study report indicated that 20.5% of Americans were identified as having medical bill…

A: Given: n= 400 ,x= 95.0 p= 0.205 p̂= 95 / 400

Q: what is a z-score of 80%?

A: 80% z score:  alpha=1-0.80           =0.2 alpha/2=0.2/2               =0.1  From standard normal…

Q: A software company is interested in improving customer satisfaction rate from the 75% currently…

A:

Q: The comparisons of Scholastic Aptitude Test (SAT) scores based on the highest level of education…

A: Let us consider two samples taken randomly It follows the assumption of normal distribution Here two…

Q: During the 2010 MLB seasons, the home team won 1,269 games and the away team won 1,371 games. What…

A: Solution-: Given: x=1269, n=1269+1371=2640 and P0=0.50 We want to find test statistic=?

Q: ​Claim: Fewer than 91​% of adults have a cell phone. In a reputable poll of 1119 adults, 83​% said…

A:

Q: A software company is interested in improving customer satisfaction rate from the 55% currently…

A: The following information is provided: The sample size is N=247N = 247, the number of favorable…

Q: Suppose we measure GPA for people in our class, we find the mean is 2.8 and the median is 3.2. What…

A: Given: Mean = 2.8 Median = 3.2