A bank manager wants to determine thepercent of time the bank's tellers are workingand idle. He decides to use work sampling,and his initial estimate is that the tellers areidle 20% of the time. Approximately howmany observations should be taken to be 95%confident that the results will not be morethan 5% away from the true result?Select one:O a. 16O b. 6O c. 246O d. 44O e. 210

The following information has been given: The estimate of population proportion is p^=0.20. The…

Answered: A bank manager wants to determine the…

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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For each problem, you must state the hypotheses, calculate the test statistic, and explain your decision. A sample of 25 cities have been classified as high or low on their homicide rates and on the number of handguns sold within the city limits: a. The table is constructed assuming that homicide rate is the independent variable. Please add %s in the appropriate position (columns or rows) to describe the pattern of the relationship. b. Is there a statistically significant relationship between these variables?
A survey of 100 fatal accidents showed that 39 were alcohol related. Find a point estimate for p, the population proportion of accidents that were alcohol related. Question 21 options: 0.639 0.61 0.281 0.39
50 part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below: # of Courses Frequency Relative Frequency Cumulative Frequency 1 12 0.24 20 a. Complete the table. b. What percent of students take exactly two courses? Submit Question
Find the 5 number summary for the data shown 9 19 50 61 85 13 28 51 73 78 94 5 number summary: Use the Locator/Percentile method described in your book, not your calcula Question Help: Video 1 Video 2 Submit Question
The number of hours per week that the television is turned on is determined for each family in a sample. The mean of the data is 30 hours and the median is 26.2 hours. Twenty-four of the families in the sample turned on the television for 15 hours or less for the week. The 11th percentile of the data is 15 hours. Step 2 of 5 : Approximately how many families are in the sample? Round your answer to the nearest integer.
Please solve for D,E, and F
Assume college women have heights with the following distribution (inches): N(65, 2.8). Complete parts (a) through (d) below. a. Find the height at the 75th percentile. The 75th percentile is. (Round to one decimal place as needed.) b. Find the height at the 25th percentile. The 25th percentile is. (Round to one decimal place as needed.) c. Find the interquartile range for heights. The interquartile range is (Round to one decimal place as needed.) d. Is the interquartile range larger or smaller than the standard deviation? The interquartile range is than the standard deviation.
Approximately 95% of the observations fall within the interval
Raymond wants to estimate the percentage of parents that use cloth diapers. He asks a randomly selected group of 200 parents whether or not they use cloth diapers. What is the data?
The following table shows the systolic blood pressure of 5 women and 5 men. Women 110 120 95 140 125 Men 114 128 120 152 100 If you plan to test if there is a difference in the blood pressure for men and women, answer the following: What is the Test Statistic?Write to 4 decimal places.
The test for a certain disease is 86% accurate. A hospital tests a sample of 5000 patients for this disease and the incidence rate of the disease is 12%. Fill in the following table showing the results of this disease testing. Disease No Disease Total Test Positive Test Negative Total A. What percent of these patients tests positive? Round to the nearest 0.1%. C. If a patient tests negative, what is the percent chance they have the disease? Round to the nearest 0.1% D.Suppose you select a patient at random from this sample, what is the probability the patient has the disease or tests positive? Use three significant digits.
The amount of time a service technician needs to change the oil in a car is uniformly distributed between 11 and 21 minutes. Let X = the time needed to change the oil on a car. c. Find the 50th percentile. Round to the nearest minute.

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