5 of them smoked 21 or more cigarettes during pregnancy. Test the researcher's statement at the a =0.05 level of significance. the null and alternative hypotheses? V versus H, tegers or decimals. Do not round.) e npo (1-Po) =O 10, the normal model to one decimal place as needed.) V be used to approximate the P-value. e P-value. e=(Round to three decimal places as needed.) re sufficient evidence to support the obstetrician's statement? A. No, do not reject the null hypothesis because the P-value is greater than a. There is not sufficient evidence to conclude that the percentage of mothers who smoke 21 or more cigarettes during pregnancy is less than 6%. 3. Yes, reject the null hypothesis because the P-value is less than a. There is sufficient evidence to conclude that the percentage mothers who smoke 21 or more cigarettes during pregnancy less than 6%. C. Yes, do not reject the null hypothesis because the P-value is greater than a. There is sufficient evidence to conclude that the percentage of mothers who smoke 21 or more cigarettes during pregnancy is less than 6%. D. No, reject the null hypothesis because the P-value less than a. There is not sufficient evidence to conclude that the percentage of mothers who smoke 21 or more cigarettes during pregnancy is less than 6%. O Time Remaining: 01:59:27 Next MacBook Pro SC G Search or type URL

Do the given data provide convincing evidence that the mean number of hours per day spent using electronic media was greater in 2009 than in 1999? Test the relevant hypotheses using a significance level of 0.01. (Use ?2009 − ?1999.) Find the test statistic. (Round your answer to two decimal places.) t =  Find the df. (Round your answer down to the nearest whole number.) df =   Use technology to find the P-value. (Round your answer to four decimal places.) P-value =    Construct and interpret a 98% confidence interval estimate of the difference between the mean number of hours per day spent using electronic media in 2009 and 1999. (Use ?2009 − ?1999. Round your answers to three decimal places.) (______,____)hours

Consider the following data for a dependent variable y and two independent variables, x, and X2. X1 | X2 y 30 12 93 47 10 108 17 112 51 16 178 40 94 51 19 175 74 7 170 36 12 117 59 13 142 76 16 213 The estimated regression equation for these data is ý = -20.24 + 2.04x, + 4.78x2. Here, SST = 15,563.6, R = 14,417.6, = 0.2488, and = 0.9548. zas 25

You may need to use the appropriate technology to answer this question. Consider the data. 6 13 20 16 11 27 21 (a) What is the value of the standard error of the estimate? (Round your answer to three decimal places.) (b) Test for a significant relationship by using the t test. Use a = 0.05. State the null and alternative hypotheses. O Ho: Po-0 O Hạ: B, 20 H: B, <0 O Hgi B, -0 O Hgi Po0 H B. -0 O Ho: B, +0 H: B, - 0 Find the value of the test statistic. (Round your answer to three decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value - State your condusion. O Do not reject H. We cannot conclude that the relationship between x and y is significant. O Reject Hp. VWe conclude that the relationship between x and y is significant. O Reject Hg. We cannot conclude that the relationship between x and y is significant. O Do not reject Hp. We conclude that the relationship between x and y is significant.