1. A company decides to investigate the amount of sick leave taken by its employees. Asample of eight employees yields the following number of sick days taken in the pastyear.00400060a. Find and interpret the rangeb.Find and interpret the standard deviation, s.c.Suppose the 6 was incorrectly recorded and is supposed to be 60. Redo parts aand b with the correct data and describe the effect of this outlier.2. For an exam given to a class, the students' scores ranged from 35 to 98, with a mean of74. Which of the following is the most realistic value for the standard deviation: -10, 0, 3,12, 63. Clearly explain what's unrealistic about each of the other values.

As per bartleby policy I answered the first question

Answered: 1. A company decides to investigate the…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 118 and standard deviation of 24 .Someone qualifies as having Stage 2 high blood pressure if their systolic blood pressure is 160 or higher.a. Around what percentage of adults in the USA have stage 2 high blood pressure? Give your answer rounded to two decimal places. ________%b. If you sampled 2000 people, how many would you expect to have BP> 160? Give your answer to the nearest person.________ peoplec. Stage 1 high BP is specified as systolic BP between 140 and 160. What percentage of adults in the US qualify for stage 1?________ %d. Your doctor tells you you are in the 30th percentile for blood pressure among US adults. What is your systolic BP? Round to 2 decimal places._______ lbs
37. Find the standard deviation and coefficient of variation from the following data: No. of Students Marks No. of Students Marks Up to 10 12 Up to 50 157 20 30 60 202 99 30 65 70 222 40 107 ed blo 80 230
Given the following data set for the amounts of sugar in a sample of 8 cereals (measured in grams): 12 8 4 9 16 8 6 10 Compute the Standard Deviation for the amount of sugar in this sample of cereals. You can use the functions built into your calculator or use the formula to compute this result. Round your final answer to one decimal place (the nearest tenth). ? = _______ grams of sugar
number 10
16
The WAIS is an IQ test. Scores on the WAIS for the 20-34 age group are normally distributed with a mean 110 and a standard deviation of 25. Scores for the 60-64 age group are normally distributed with a mean of 90 and a standard deviation of 25. Find the percent of 20-34-year-olds that have an IQ greater than 120. a. 16% b. z= 0.4 or 40% c. 0.6554 or 65.54% d. 0.3446 or 34.46%
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Suppose baby kittens' weights are normally distributed with a mean of 10.7 and a standard deviation of 1.7. Find the baby kitten weight that corresponds to the following Z-scores. Round your answer to 3 decimals. a. Kitten a: Z = 0.75, weight b. Kitten b: Z = 1.92, weight c. Is Kitten a overweight, underweight, or exactly average? Exactly Average O Overweight Underweight d. Is Kitten b overweight, underweight, or exactly average? O Overweight O Underweight O Exactly Average
According to a recent publication, the mean price of new mobile homes is $60,400. Assume a standard deviation of $7900. Let x denote the mean price of a sample of new mobile homes. a. For samples of size 25, find the mean and standard deviation of x. Interpret your results in words. b. Repeat part (a) with n=50. a. For ________________________ (Samples of 25 mobile homes, the 25 mobile homes sampled ) the mean and standard deviation of _____________ (all possible sample mean prices, the prices of the mobile homes) are $_______________ and $________________, respectively. (Round to the nearest cent as needed) b. For ________________________ (Sample of 50 mobile homes, the 50 mobile homes sampled) the mean and standard deviation of _____________ (all possible sample mean prices, the prices of the mobile homes) are $_______________ and $________________, respectively. (Round to the nearest cent as needed)
Suppose that the speeds of cars travelling on California freeways are normally distributed with a mean of 55 miles . The highway patrol's policy is to issue hour miles tickets for cars with speeds exceeding 75 The records show that exactly 1% of the speeds exceed this limit. Find the standard deviation of the speeds of hour cars travelling on California freeways. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place. miles hour
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