hello i need help with these statistic questions thank you all questions are provided below in order

question 19

During routine conversations, the CEO of a new start-up reports that 25% of adults between the ages of 21 and 39 will purchase her new product. Hearing this, some investors decide to conduct a large-scale study, hoping to estimate the proportion to within 3% with 90% confidence. How many randomly selected adults between the ages of 21 and 39 must they survey? The number of adults that should be surveyed is (Round up to the nearest whole number.)b. Obtain a normal probability plot, boxplot, histogram, and stem-and-leaf diagram of the data. Choose the correct normal probability plot below. B. O C. OD. O A. O 3 3 37 38 8 Z-score Z-score z-score Z-score -34 -34 -34 240 400 240 400 240 400 240 400 Time Time Time Time Choose the correct boxplot below. O B. XC. O D. O o o 240 400 240 400 240 400 240 Time Time Time Time the histooChoose the correct histogram below. 1t- X .5. .5. .5. 5. g g g a 0| 0| 0| W a, e. a, e. a, e. a, e. E E E 2 LL LL LL LL 3 I I I I I I I /' G I I I I I I I /' {i I I I I I I I /' C I I I I I I I x' 250 380 D 250 330 D 250 330 D 250 330 D Time Time Time Time Choose the correct stemandIeaf diagram below. 1* 2 5 8 X 15 c. 25 5 II 25 2 2599 If: 2:3 159'} 26 2 (a 8 9 1? IT f: it 9 2 Eli 4 18 I 28 4 2 2') 34469 19 S 29 3446'; 2 30 3 4 3E! 3!] 3 4 3t] 1 33 3;. 3 4 3i 3% 3 4 33 5 33 3446' 33 33 3446'; 34 I 34 4 34 54 4 35 35 c. it 9 35 55 r: s 9 36 3f: 2599 3:3 36 2599 33' (J 33' 5 it 3T 3? 5 8 1:. Remove the outliers [if any) from the data and then repeat part (a). If there are no outliers. then enter the confidence interval from part (a). The condence interval is from 2'352' months to 2939' months. (Type integers or decimals rounded to one decimal place as needed} cl. Comment on the advisability of using the zinterval procedure on these data. x Since the data do not contain any outliers. it is advisable to use the zinterval procedure. Although the data do not contain outliers and the data appear normally distributed, the sample size is moderate and there is no mention that the population is normally distributed. so using the z-intenral procedure here is not advisable. Since removal of the outlier does not appreciably affect the confidence interval and because the sample size is moderate. it is advisable to use the zinterval procedure. * Although removal of the outlier does not appreciably affect the confidence interval. using the z-interval procedure here is not advisable because the sample size is moderate. the data contain an outlier, and removing the outlier is notjustified. A random sample of 20 maximum sentences for murder yielded the 254 342 303 297 271 data, in months, presented to the right. Use the technology of your 264 333 286 choice to complete parts (a) through (d) below. 298 268 269 307 373 293 278 264 258 295 278 295 a. Find a 95% confidence interval for the mean maximum sentence of all murders. Assume a population standard deviation of 35 months. The confidence interval is from months to months. (Type integers or decimals rounded to one decimal place as needed.)b. Is the one-proportion z-interyal procedure appropriate? Select all that apply. V. The procedure is appropriate because the necessary conditions are satised. 3' The procedure is not appropriate because the sample is not a simple random sample. The procedure is not appropriate because n :r: is less than 5. x The procedure is not appropriate because 3:: is less than 5. c. Select the correct choice below and. if necessary, fill in the answer boxes within your choice. The sets condence interval is from core" to uses". [Round to three decimal places as needed. Use ascending order.) The oneproportion zinteryal procedure is not appropriate. d. Select the correct choice below and. if necessary, fill in the answer boxes within your choice. The margin of error is ccss'. The sons confidence interval is c.1sc' e coss'. [Type integers or decimals. Ftound to three decimal places as needed.) The oneproportion zinteryal procedure is not appropriate. Given below are the number of successes and sample size for a simple random sample from a population. x = 12, n =50, 90% level a. Determine the sample proportion. b. Decide whether using the one-proportion z-interval procedure is appropriate. c. If appropriate, use the one-proportion z-interval procedure to find the confidence interval at the specified confidence level. d. If appropriate, find the margin of error for the estimate of p and express the confidence interval in terms of the sample proportion and the margin of error. a. p = (Type an integer or a decimal. Do not round.)