community psychologist selects a sample of 16 local police officers to test whether their physical endurance is better than the median score of 74. She measures their physical endurance on a 100-point physical endurance rating scale. Performance Scores 92 54 53 63 96 94 95 78 72 84 81 75 88 90 79 86 Based on the data given above, compute the one-sample sign test at a 0.05 level of significance. x =

Based on the following data for the current year, what is the number of days' sales in receivables? Assume 365-Day year.

Round your answer up to the nearest whole day.

a.31

b.74

c.67

d.140

One of the benefits of a linear regression model, is that it’s relatively easy to create a confidence interval on the mean response. Imagine you created a linear regression model from a dataset with n = 12, that applies over the range 0.0 ≤ x ≤ 10.0, where the mean value of x = 5.0 , the fitted model is Y = 74 + 15 x, Sxx = 0.75, and σ2. = 1.5 At what value of x does the minimum width of the 95% confidence interval on the mean response occur?

Two sections of a class in statistics were taught by two different methods. Students’ scores on a standardized test are shown in Table 5.12 . Do the results present evidence of a difference in the effectiveness of the two methods? (Use α = 0.05.)

Class A: 74, 97, 79, 88, 78, 93, 76, 75, 82, 86, 100, 94

Class B: 78, 92, 94, 78, 71, 85, 70, 79, 76, 93, 82, 69, 84

Include R code.

The sample data below are the typing speeds (in words per minute) and reading speeds (in words per minute) of nine randomly selected secretaries. Here, x denotes typing speed, and y denotes reading speed.
  

At the 10% significance level, predict the reading speed for a typing speed of 74 words per  
minute.

Use the given degree of confidence and sample data to construct a confidence interval for the population mean µ.

The data below consists of the test scores of 32 students. Construct a 99% confidence interval for the population

A community psychologist selects a sample of 16 local police officers to test whether their physical endurance is better than the median score of 72. She measures their physical endurance on a 100-point physical endurance rating scale. Performance Scores 87 83 78 74 51 88 84 75 89 82 61 86 76 58 77 80 Based on the data given above, compute the one-sample sign test at a 0.05 level of significance. x=

Given the following prices and quantities

Compute and interpret the Laspeyres price index number for the year 2018 with 2008 as base.

Compute the interpret the Paasche’s price index number for the year 2018 with 2008 as base

The data show systolic and diastolic blood pressure of certain people. A) Find the regression​ equation, letting the systolic reading be the independent​ (x) variable. B) Find the best predicted diastolic pressure for a person with a systolic reading of 148. C)Is the predicted value close to 64.1​, which was the actual diastolic​ reading? Use a significance level of 0.05.