Internet providers: In a survey of 700 homeowners with high-speed Internet, the average monthly cost of a high-speed Internet plan was $54.56 with standard deviation $11.96. Assume the plan costs to be approximately bell-shaped. Estimate the number of plans that cost between $30.64 and $78.48. Round to the nearest whole number. The number of plans that cost between $30.64 and $78.48 is

The average depths in feet of four oceans are 13,215, 12,881, 13,002, and 3953. Calculate the mean and median of these depths.

A company wants to determine the frequency of the occurrence of invoice errors. Suppose that in a sample of 100 sales invoices, 10 contain errors. construct a 90% CI for the proportion error.

A local travel office has 10 employees. Their monthly salaries are given below. $1520, $1730, $1690, $1100, $1420, $1560, $1830, $1350, $2800, $5500 ... (a) Find the mean. The mean is $

Do these calculations using Excel, a graphing calculator, or an app. Type the data in different columns and use Excel to find the means, standard deviations, and the calculation for r. An outbreak of the deadly Ebola virus in 2002 and 2003 killed 91 of the 95 gorillas in 7 home ranges in the Congo. To study the spread of the virus, measure " distance" by the number of home ranges separating a group of gorillas from the first group infected. Here are data on distance and number of days until deaths began in each later group:   Distance   xx   1 4 6 5 5 6 Days   yy   4 20 34 44 48 47 Use a calculator or software to find the following values. (a) Find the mean and standard deviation of   xx. MEAN:   STANDARD DEVIATION:    (b) Find the mean and standard deviation of   yy. MEAN:   STANDARD DEVIATION:    (c) Find the correlation rr between xx and yy. r:    Speak

Jim Smith, a marketing student, observed how much each customer spent in a local convenience store. $ 20.72 $ 16.97 $ 3.16 $ 19.41 12.67 2.60 10.39 9.51 14.95 22.28 5.10   2.47 15.97 5.59   Intervals                 Frequency $0-5.99                     ? $6.00-11.99               ? $12.00-17.99            ? $18.00-23.99             ? Please answer the "?" for the frequency's

The speed, in miles per hour, of Mario's serves during tennis practice is shown in the stem-and-leaf plot below. a. What is the range of the speeds, in miles per hour, of Mario's tennis serves?  Show or explain how you got your answer. b.What is the mode of the speeds, in miles per hour, of Mario's tennis serves?  Show or explain how you got your answer. c.What is the median speed, in  miles per hour, of Mario's tennis serves?  Show or explain how you got your answer. d. The speed of one additional tennis serve will be added to Mario's stem-and-leaf plot.  What is the greatest amount, in miles per hour, the median speed can change?  Show or explain how you got your answer.

A marketing company is interested in the proportion of people that will buy a particular product. Match the vocabulary word with its corresponding example

I'm having trouble understanding what to do after I apply the formula to this problem. Any help would be awesome. Thank you.

The tuition and fees (in thousands of dollars) for the top 14 universities in a recent year are listed below. Find the mean, median, and mode of the data, if possible. If any of these measures cannot be found or a measure does not represent the center of the data, explain why. 46 44 44 44 46 47 41 46 ㅁ 44 35 41 44 46 39