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

Q: The administration at Warmfuzzy University gave a 7-item questionnaire to a representative sample of…

A: N is the total number of observations.∑X is the summation of the total observations.

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Q: Q. Draw a conclusion from the histogram

A: Given :

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A: Describe how the distribution of sample means changes as sample size increases. What is the…

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A:

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A: The objective of this question is to find the proportion of adults with scores above 110 on the…

Q: O 50%

A: Option b 50%

Q: For a set of data where n = 64, and Range = 1.2, the most appropriate bin width (i.e., the width of…

A: Solution

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A:

Q: Listed below are the measured radiation absorption rates​ (in W/kg) corresponding to 11 cell phones.…

A: The given data is x 1.19 0.95 0.74 1.38 1.06 0.86 0.91 1.05 1.41 0.52 0.93

Q: calculate the Sd.

A: GivenFreshmanSophomore68.568.362.756.756.362.56162.562.861.15259.65661.362.561.553.955.857.358.6

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A: From the given information, The value of n is 30. The average value of population is 300.

Q: Find sample size. CI= 75% E=.06 sample prop.= 41/81

A: The random variable X follows binomial distribution. We have to use normal approximation to binomial…

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A: Given,     The objective is to find the point estimate for p.

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A: Given data: sample size (n) = 500 To find: Chi square statistic

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A:

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A:

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A:

Q: ep 5 of 5: Find the percentage of students that scored higher than 80.5. Round your answer to the…

A: Given:  Histogram of score with corresponding frequency Score:     70.5-75.5, 75.5-80.5, 80.5-85.5,…

Q: Forty plasma TVs were tested, and the number of watts per hour they used recorded. Given that the…

A:

Q: A survey of 100 fatal accidents showed that 39 were alcohol related. Find a point estimate for p,…

A: The objective of this question is to find the point estimate for p, the population proportion of…

Q: Use the California method in the linear interpolation formula to estimate the 86.81 percentile for…

A: 86.81th percentile, P86.81= L+h(86.81*n/100-cf.)/f Here L is the lower limit of modal class. h=…

Q: Given n = 49, x-bar = 50, s = 7, and H0: µ = 52, what is the computed value for the test statistic?…

A:

Q: Assume college women have heights with the following distribution (inches): N(65, 2.8). Complete…

A: Let X denote the women heights and it follows normal distribution with parameters μ=65,σ=2.8 (a) The…

Q: the 28th percene. of Newborn bies 9.5 5.1 6.0 8.0 8.6 5.7 9.3 6.2

A: Given that data  6.1,9.1,9.5,6.0,8.6,6.2,9.1,6.1,8.0,5.7,6.5,6.4,5.8,9.3,6.2 Arranging Observations…

Q: Forty randomly selected people were asked the number of people living in their home. Let X = the…

A: Relative frequency = frequency/total no. of people Total  no . of people = 40

Q: A group of students need to submit a project and they need to survey people about their daily…

A: see the handwritten solution

Q: Examine the image below and then answer all parts of the question under it. Enter your answers as…

A: a) There are 4 yellow objects in 10 objects.So, P(yellow)=410=0.4b) There are 3 hearts in the 10…

Q: Sand and clay studies were conducted at the West Side Field Station of the University of California.…

A: Arranging the data into ascending order: 0.1, 1.7, 8.4, 16.4, 18.2, 19.5, 24.2, 24.8, 27.3, 27.4,…

Q: (a)  What is the level of significance? (Enter a number.) State the null and alternate hypotheses.…

A: Given: population mean = 4.30 sample standard deviation = 0.64 sample mean = 3.75 n=6 to find:…

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A: The margin of error (E) is 0.02. The confidence level is 0.95.

Q: Find the P-value (to 4 decimals) for a x test with d. f. = 10 and STS x = 13 if the test is: %3D a.…

A: The degrees of freedom are d.f = 10 And the value of test statistic is = 13

Q: The monthly salaries of a sample of 500 employees were rounded to the nearest R10 rand notes. They…

A:

Q: In the US, 43.9% of all people have type O blood, 40.6% have type A blood, 10.8% have type B blood…

A: Hypothesis: H0: The distribution for blood types is different for millionaires. Outcome Frequency…

Q: Male Beagles

A: From Given Data and Graph