The mean value of land and buildings per acre from a sample of farms is $1700, with a standard deviation of $200. The data set has a bell-shaped distribution. Ass the number of farms in the sample is 71. (...) (a) Use the empirical rule to estimate the number of farms whose land and building values per acre are between $1300 and $2100. 67 farms (Round to the nearest whole number as needed.) (b) If 23 additional farms were sampled, about how many of these additional farms would you expect to have land and building values between $1300 per acre and $2100 per acre? farms out of 23 (Round to the nearest whole number as needed.) a

The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 44 ounces and a standard deviation of 10 ounces. Use the Empirical Rule. Suggestion: sketch the distribution in order to answer these questions. a) 99.7% of the widget weights lie between and b) What percentage of the widget weights lie between 24 and 74 ounces? c) What percentage of the widget weights lie above 34? Question Help: DVideo D Post to forum E Calculator Submit Question

Diastolic blood pressures are assumed to follow a normal distribution with a mean of 85 and a standard deviation of 12. What proportion of people has diastolic blood pressures less than 80? A)0.661 B)0.338 C)0.50 D)0.75

The distribution of male height (X) in the US is known to be normally distributed with mean of about 70 inches and variance of 25 inches. What is the IQR? (hint: think about what the IQR represents in a boxplot with regard to percentiles). The z tables can be found at the bottom of the written portion of the exam or at the end of Lecture Note 10. a.) 5.0 b.) 9.0 c.) 7.3 d.) 10.0 e.) 6.7

According to a recent​ publication, the mean price of new mobile homes is $65,100. Assume a standard deviation of $7700. Let x denote the mean price of a sample of new mobile homes.   a. For samples of 50 mobile homes, the mean and standard deviation of all possible sample mean prices are $_________ and ​$__________​, respectively. ​(Round to the nearest cent as​ needed.) b. For samples of 200 mobile homes, the mean and standard deviation of all possible sample mean prices are ​$________and ​$_________​, respectively. ​(Round to the nearest cent as​ needed.)