A software company is interested in improving customer satisfaction rate from the 66% currently claimed. The company sponsored a survey of 208 customers and found 148 customers were satisfied. What is the test statistic z?

Q: →>> What's a standard score?

A: Introduction  from the above question we have to explain what is a standard score

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

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Q: Which number best approximates risk associated with tea drinking in men?

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Q: much does the mean score tell you about the performance of the whole class?

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Q: When the Standard Score = -1, what is the percentile of the raw score? %3D O 2nd 14th O 16th 34th…

A: It is an important part of statistics. It is widely used.

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Q: Anna is 3 years old and in the 42nd percentile for height in her age group. What does this mean?…

A: Given: 1)Anna is 3 years old and, 2) In the 42nd percentile for height in her age group. In the…

Q: additionally how would you find the: test statistic & p-value

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Q: Explain how can we find the corresponding z-score of an area and a percentile.

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

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A: The miss rate will be 2.5%

Q: The digital marketing specialist would like to test the claim that the percent of customers who use…

A: Formula : Test statistic

Q: Researchers examined the influence of a television program on children's aggressiveness. The number…

A: Since we only answer up to 3 sub-parts, I'll answer the 1st 3 sub-parts. Please resubmit 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: A large warehouse is filled with 5,238 tungsten light bulbs. An electronics engineer wants to…

A: Here sample statistics is sample mean So statistic of interest is sample mean lifespan of 18 bulbs

Q: What is Percentile Rank of an Observation?

A: Percentiles: If the elements in the data set are arranged in ascending order of magnitude, then the…

Q: In a survey of 400 items in a production line, it was discovered that 10% are defective. What is the…

A: Given the survey of 400 items in a production line.The percentage of defectives is 10%,Let n = 400…

Q: What is the percentile rank of a bag that contains 1025 chocolate​ chips?

A: The mean is 1252 and the standard deviation is 129.

Q: A police officer waits on a road to catch speeding cars. In a one hour sample, the officer find that…

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Q: Please explain how you got the 9.36 z-score test statistic?

A: Z for difference of proportion is given by,  Z= p1-p2/(S.E.)  SE is standard error which is…

Q: If you increase the sample size to 50 from 30, will the standard error of the mean be smaller or…

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Q: The sample mean or sample proportion is unbiased estimator to the population proportion in case of…

A: The sample mean or sample proportion is unbiased estimator to the population proportion in case of…

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A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…

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

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

A: Given that  Sample size n =243 Favorable cases x =205 Sample proportion p^=x/n  =205/243 =0.8436…

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: Describe the formula used to calculate a z-score?

A: The formula used to calculate z-score is

Q: poll of 60 people asking “do you prefer dogs or cats?” Was taken, and 53 of those surveyed said they…

A: Sample size n =60 Favorable cases x =53 Sample proportion p^=x/n  =53/60 =0.8833 Population…

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Q: Explain the Critical Z score.

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Q: What is the 75th Percentile of a data set when the Inter Quartile Range (IQR) is 12.5 and the first…

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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: What do you think is the best number of respondents when conducting a research? Explain your answer.

A: The best number of respondents when conducting research: The number of respondents we need depends…

Q: How many households must you survey if you want to be 94% confident that your sample percentage has…

A: Margin of error  = 0.03 Confidence level =  94%

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

Q: How does an observed sample mean qualify as a common outcome?

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