A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 520 babies were​ born, and 286of them were girls. Use the sample data to construct a 99​% confidence interval estimate of the percentage of girls born. Based on the​ result, does the method appear to be​ effective?  ________________________<p<______________________ does the method appear to be effective?

Out of 200 people sampled, 78 had dogs. Based on this, construct a 95% confidence interval for the true population proportion of people with dogs. give your answers as decimals to three places  ________ < p < _______

We wish to estimate what percent of adult residents in Ventura County like chocolate. Out of 500 adult residents sampled, 429 like chocolate. To construct a 99% confidence interval for the proportion (p) of adult residents who like chocolate in Ventura County, you need to use which one of the following calculator? Hypothesis Test for a Population Proportion Confidence Interval for a Population Mean Given Data Confidence Interval for a Population Mean Given Statistics Chi-Square Test for Independence Hypothesis Test for a Population Mean Given Data Two Dependent Sample Means Comparison Given Data Confidence Interval for a Population Proportion Hypothesis Test for a Population Mean Given Statistics One-Way ANOVA Two Independent Sample Means Comparison Given Statistics Two Independent Sample Means Comparison Given Data Two Independent Proportions Comparison Chi-Square Test for Goodness of Fit Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents)…

Question3:   It is known that the population wellbeing level follows a normal distribution. The wellbeing levels of 9 male is shown below.      2 | 247   3 | 34569   4 | 7     Use the sample data to calculate the 95% confidence interval                 Would we reject the hypothesis that the male has a statistically significant different wellbeing level from female at a 1% significance level? (hint: use the data above to conduct a statistic test, specify 4 steps)

Question:     Part B. Construct a 95​% confidence interval of the mean pulse rate for adult males. __bpm <u<__bpm Multiple Choice: Compare the results. A. The confidence intervals do not​ overlap, so it appears that adult females have a significantly higher mean pulse rate than adult males. B. The confidence intervals​ overlap, so it appears that adult males have a significantly higher mean pulse rate than adult females. C. The confidence intervals do not​ overlap, so it appears that there is no significant difference in mean pulse rates between adult females and adult males. D. The confidence intervals​ overlap, so it appears that there is no significant difference in mean pulse rates between adult females and adult males.

If n=19, ¯x(x-bar)=34, and s=12, construct a confidence interval at a 95% confidence level. Assume the data came from a normally distributed population.Give your answers to one decimal place. ________________< μ <_____________________

Help with question 3 and 4

If n=400 and X=80​, construct a 90​% confidence interval estimate for the population proportion.   ______≤π≤_____ ​(Round to four decimal places as​ needed

In a recent poll, 430 people were asked if they liked dogs, and 94% said they did. Find the Margin of Error for this poll, at the 95% confidence level. Give your answer to four decimal places if possible.   ______________________

In a survey, 28 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $44 and standard deviation of $6. Construct a confidence interval at a 98% confidence level.Give your answers to one decimal place._______________  ±  _______________Interpret your confidence interval in the context of this problem.