JIn-shopothesis test for the difference between two population proportions02562 2600368.qx3zqy7Jump to level 1The manager of a coffee shop is trying to determine if drive-through customers buy fewer items than customerswho come into the shop. The manager randomly samples both populations and calculates the proportion ofcustomers in each that buy three or more items. The results of the data collected are shown below.What are the population parameters?YPickDrive-throughSuccesses27 SuccessesWhat is the level of significance? Ex: 0.12Observations76 Observations411190.345p-hat_10.355 p-hat_2What is the null hypothesis Ho?PickConfidence Level0.1429What is the alternative hypothesis Ha? Pickp-valueShould Ho be rejected or does Ho fail to be rejected? PickWhat conclusion can be drawn from the data?Pickevidence exists to support the claim that drive-through customers buy fewer items than in-shopcustomers.2pW

Answered: The manager of a coffee shop is trying…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Four scenarios of statistical studies are given below. Decide which study uses a population parameter. Answer O Lakeside Family Dentistry reported that 6 of the 15 patients who came in for a regular cleaning one day had at least one cavity. O As part of her senior project, Kaisa asked 84 of her classmates if they voted in the last presidential election. 39 said yes. O of 351 dog owners who were surveyed, 70 reported owning two dogs. The average finish time for the Ironman, Kona was 11:32 for the 1883 finishers, with an average swim time of 1:14, an average bike time time of 4:14.
the distribution of sample means consists of the
A manager wishes to build a control chart for a process. A total of five (05) samples are collected with six (06) observations within each sample. The sample means (X-bar) are; 15.36,14.61,16.36,20.28, and 15.77 respectively. Also, the corresponding ranges are; 10.79, 8.37, 4.81, 8.17, and 3.31 respectively. The lower and upper control limits of the R-chart are respectively O a. None is correct O b. 1, 10.5 O c. 0,14.18 O d. 0, 15.25 O e. 0, 14.11
An unbiased sample is a good representation of the population. True or False
In a certain population, the mean price of the stock prices was 230, the median was 255, the variance was 1225, the first quartile was 240. and the third quartile was 270. Find the second quartile ? What percentage of data values is less than or equal 270? OApproximately 68%. OApproximately 50% OApproximately 75% OApproximately 25% OApproximately 95% OApproximately 100% What is the coefficient of variation? 018.78% 0532.61% 015.22% 0657.14% O14.89% Determine whether the data value 160 is an outlier or not ? OYes. ONo. OCan't conclude.
Why is it important to report both a measure of central tendency and variability to describe a set of scores? Group of answer choices Sets of data with different central tendencies may have different patterns of variability. Sets of data with the same central tendency may have the same patterns of variability. Sets of data with the same variability may have different patterns of central tendency. Sets of data with the same central tendency may have different patterns of variability.
How does an observed sample mean qualify as a common outcome?
The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.
A study was done looking at cancer rates near a large factory. The researchers collected data for the survey by placing signs around town, listing a survey website that people could log into if they or their family members developed cancer in the last 10 years. What main type of bias in present in this study design? Resemblance bias Low sample size bias Volunteer bias Sample of convenience
Security scans are often completed on computers in a particular college to assess the security risk from viruses etc. A sample of 120 computers which are considered at risk for viruses and other security issues are checked with a particular security scanner on a Monday and then monitored over the following week. The number of computers which broke down over the following week were recorded. The results are as follows: Security Scan (% Risk) Breakdown No Breakdown Low Risk (0 - 10%) 3 61 Slight/Moderate Risk (10 – 30%) 13 28 High Risk (>30%) 12 3 (i) Based on the above sample work out the probability that a computer in the college will breakdown. Input your answer correct to 4 decimal places here: (ii) Based on the above sample work out the probability that a computer has a low risk level OR doesn't breakdown. Input your answer correct to 4 decimal places here: (iii) Based on the above sample work out the probability that a computer has a high risk AND has a breakdown. Input your answer…
Illustrate the sample covariance of a sample with itself?
Empathy: The Interpersonal Reactivity Index is a survey designed to assess four different types of empathy. One type of empathy, called Empathetic Concern, measures the tendency to feel sympathy and compassion for people who are less fortunate. The index ranges from 0 (less empathetic) to 28 (more empathetic). The following data, representing random samples of 14 males and 14 females, are consistent with results reported in psychological studies. Boxplots show that it is reasonable to assume that the populations are approximately normal. Can you conclude that there is a difference in mean empathy score between men and women? Let , denote the mean empathy score for men. Use the a =0.05 level and the P-value method with the TI-84 Plus calculator. Males 13 20 12 16 13 26 21 23 8. 15 18 25 15 23 Females 22 20 26 25 28 24 16 19 21 23 15 26 19 25 Send data to Excel Compute the P-value. Round the answer to at least four decimal places. P-value =

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