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- Question 21, Multiple choice below. 21. The financial aid director of a large college reports that 38% of the students enrolled are receiving some sort of financial aid. A researcher claims the percentage is lower and finds (from sampling) 29 out of 116 students are receiving some sort of financial aid. At alpha = 0.05, decide whether the financial aid director's report that 38% of the students are receiving some sort of financial aid holds up. For question #21 (multiple choice), choose the alternative hypothesis. For #22, fill in the space provided with your calculated value for p hat. For question #23, fill in the space provided with your calculated z-value from the information provided. For #24, answer True or False with regard to rejecting the null hypothesis.Spgsolve parts b, onlys
- Part B4 Please need help. Show clear solution/answer if possible. Thank you4. During a given exercise in class data on the heights of fathers (X) and of sons (Y) was collected. The following results were then obtained: Σχ= 71, ΣΥ = 70, Σ χ2555, Σγ?526 and ΣΧΥ-527 %3D Check for the level of association between the heights of fathers 10 and of 10 sons
- Question 2Question 1 A study was conducted on time taken (in seconds) for an algorithm to finish running, y, and processing power of a machine, r. A linear model was fitted using the statistical software R, producing the following output: Coefficients : (Intercept) 98. 81082 -0.75263 Estimate std. Error t value Pr(>|t|) 29.8 1.74e-09 *** -17.6 1.1le-07 *** 3.31574 0.04277 Signif. codes: 0.001 0.01 0.05 '.' 0.1 1 Residual standard error: 4.304 on 8 degrees of freedom Multiple R-squared: 0.9748, F-statistic: 309.7 on 1 and 8 DF, p-value: 1.1le-07 Adjusted R-squared: 0.9717 (a) From the R output, compute the sample correlation coefficient and interpret its value. (b) From the R output, obtain the equation of the estimated regression line. (c) Interpret the slope coefficient. (d) Discuss whether the simple linear regression model obtained does a good job of explaining observed variation in the time taken for an algorithm to finish running. (e) Using information from the R output, compute the sum of…2
- Q. 29 unit 4QUESTION 14 CardioGood Fitness Treadmill Products Data The market research team at CardioGood Fitness retail store wants to investigate whether there are differences across the product lines of treadmills sold; TM195 (low-end model), TM498 (medium grade model) and TM798 (high-end model) with respect to customer characteristics. The team decides to collect data on individuals who purchased a treadmill at a CardioGood Fitness retail store during the past three months. One question the team is interested in is if there is a difference in the miles of intended use of the treadmill between males and Females. t-Test: Two-Sample Assuming Unequal Variances MaleMiles Female Miles Mean 112.81 89.99 Variance 2991.43 2006.76 Observations 104 76 Hypothesized Mean Difference df 176 t Stat 3.0732 P(T<=t) one-tail 0.0012 t Critical one-tail 1.6536 P(T<=t) two-tail 0.0025 t Critical two-tail 1.9735 In the essay box, clearly answer questions 1-5 below: 1. Is this conducting a one-sided test or a…Ch. 6.1 CI What sample size is needed to give the desired margin of error in estimating a population proportion with the indicated level of confidence? (16) A margin of error within +/- 1% with 99% confidence. (18) A margin of error within +/- 2% with 95% confidence. An initial small sample has p-hat=0.78