1.According to survey data collected from 500 students in a recent Stat class, the histogram for...

1.According to survey data collected from 500 students in a recent Stat class, the histogram for the number of hours of sleep they typically got per night is close to the normal curve with an average of 6.3 hours and a SD of 1.4 hours.

a) Find percentage of students who sleep between 7 and 8 hours

b) A student who sleeps only 5 hours per night is at the _______th percentile of the score distribution

2.Consider the following set of ten numbers: 5, 5, 5, 7, 7, 7, 7, 3, 3, 1a) Find the average and the media of these numbers

c) Find the standard deviation

d) If you were to cut every number in the list in half (i) the new average would be
(ii) the new median would be
(iii) the new standard deviation would be

Classes	Count (frequency)	Percentage of data

e) Now suppose you add the number 10 to the original list (so the new list has 11 numbers)
(i) the average would be

(ii) the median would be

Expert Solution

------------------------------------------------------------------------------------------------------------------------------

orchestra answered 1 year ago

2. According to survey data collected from 500 students in a recent Statistics class, the histogram...

2. According to survey data collected from 500 students in a recent Statistics class, the histogram for the number of hours of sleep they typically got per night is close to the normal curve with an average of 6.5 hours and a SD of 1.4 hours. a) Find percentage of students who sleep between 7 and 8 hours b) A student who sleeps 7 hours per night is at the _______th percentile of the score distribution c) Find the first...

python3 Design a class named Histogram to display a histogram of data. The Histogram class contains...

python3 Design a class named Histogram to display a histogram of data. The Histogram class contains the following A number of instance variables/fields to store a histogram of data. You can design them by your own. A constructor that creates a histogram with the following a list of data. It may have more than 2 columns. x_width: the width of the 1st column in the horizontal histogram. The default value is 5. y_width: the width of the 2nd column in...

The following data were collected from a survey of 10 randomly selected college students: Find the...

The following data were collected from a survey of 10 randomly selected college students: Find the mean, median, mode, variance, standard deviation, the five number summary report of the hours per week of the sample of students’ studied. Show your work. Student ID Facebook # hours of study per week 244701130 Yes 8 302896051 no 5 734077249 yes 11 891072704 yes 5 730265917 yes 9 894866913 no 6 644678646 no 1 369417477 yes 1 388511718 yes 2 554470987 no 1

1. (10pts) Suppose from a class survey of 35 students, 6 students states they believe in...

1. (10pts) Suppose from a class survey of 35 students, 6 students states they believe in Bigfoot. Answer the following questions. (a) Obtain a point estimate for the population proportion of students that believe in Bigfoot. (b) Determine the critical value needed to construct a 98% confidence interval for the proportion of students that believe in Bigfoot. (c) Determine the standard error estimate (SE-est) for the confidence interval. (d) Construct a 98% confidence interval for the proportion of students that...

A simple random sample of 70 Stat 20 students is taken from my class of 340...

A simple random sample of 70 Stat 20 students is taken from my class of 340 students; the average number of units these students is taking is 16.1, with an SD of 1.9. Last spring I taught a smaller class with only 96 students, and those 96 students took an average number of units of 15.5, with an SD of 2.2. Do a hypothesis test to decide whether the average number of units for this semester's Stat 20 class is...

In a recent college statistics class, data was collected on each student's height and their shoe...

In a recent college statistics class, data was collected on each student's height and their shoe size. The first three tables of the regression output are below the conclusions. Please agree or disagree with the conclusions and, of course, state your statistical reasoning. There is sufficient evidence to believe that a statistically significant relationship exists between a student's height and his/her shoe size. About 80% of the variation in shoe size is determined by the variation in height. For each change...

According to a recent survey conducted at a local college, we found students spend an average...

According to a recent survey conducted at a local college, we found students spend an average of 19.5 hours on their smartphone per week, with a standard deviation of 3.5 hours. Assuming the data follows the normal distribution. a) How many percent of students in this college spend more than 15 hours on their smartphone per week? b) If we randomly select 12 students, what is the probability that the average of these students spending on the internet is more...

A survey of 600 high school students in our stat showed that 216 felt unsafe in...

A survey of 600 high school students in our stat showed that 216 felt unsafe in their local school. Construct a 95% confidence interval for the proportion of students who felt unsafe.

A survey of 700 high school students in our stat showed that 216 felt unsafe in...

A survey of 700 high school students in our stat showed that 216 felt unsafe in their local school. Construct a 95% confidence interval for the proportion of students who felt unsafe.

In a survey of 500 females and 500 male students, 345 and 365 female and male...

In a survey of 500 females and 500 male students, 345 and 365 female and male students respectively, reported that they decided to attend college in order to make more money. Is ther population of female students who decided to attend college in order to make more money less than that of male studenst? Conduct the test with a significance level of 0.05.

Question